800-946-2642
Shop by Car
Engine
Replacement Engines for your Classic Mini at Mini Mania
Created: September 09, 2016
Rebuilt engines with upgrades! Only at Mini Mania.
The Mini Mania Engine Shop
Created: January 20, 2015
Now Open! Mini Mania Engine Shop. Trust the experts.
Created: October 03, 2014
Fan belts for your Classic Austin Mini Cooper.
Created: March 28, 2014
Our engine had been rebuilt, our ancillaries completed, and our subframes restored, so we decided to combine all the pieces together to try to run our Mini without attaching the body
King Bearings
Created: March 28, 2014
Founded in 1960, King Engine Bearings is a world-class developer and manufacturer of engine bearings for automobiles, light to heavy-duty trucks, marine, aviation, standby power and other types of internal combustion engines. King’s only product is engine bearings. As a result of its specialization and focus, the company is recognized for producing the highest quality engine bearings available in the market today.
Created: March 14, 2014
Starting Our Mini's Engine Rebuild
Created: March 14, 2014
Building the lower End
Engine Cost Estimator Mini Cooper
Created: February 28, 2014
Estimate the cost to have us build your dream Mini Cooper engine
Created: January 27, 2014
The proper end gap assures a good combustion seal (minimum blowby) and allows adequate clearance between the ends of the rings so they do not butt up against each other and cause the rings to scuff or bind.
Mini Tec Honda VTEC Conversion Kit and Accessories
Created: December 12, 2013
Mini Tec Honda VTEC Conversion Kit and Accessories
Austin Mini Flywheel Problems
Created: September 11, 2012
When installing a flywheel onto a engine/crankshaft I strongly recommend that you "lap the interface surface" between the flywheel and crank. The objective of this process is to insure an absolute perfect fit on the tapper. If for any reason this is not the case you will probably NOT be able t...
Motor Oils - It Is So Very Misunderstood
Created: August 23, 2011
I think it is time to go over passenger car automotive engine oils in detail. I will be writing several articles to be published soon so I will try to get some of it out here. I feel this is a very general topic for all car owners on this board.
Motor Oils - It Is So Very Misunderstood - part 2
Created: August 23, 2011
I think it is time to go over passenger car automotive engine oils in detail. I will be writing several articles to be published soon so I will try to get some of it out here. I feel this is a very general topic for all car owners on this board.
Mini Mania Crankcase Ventilation Kit, C-2A265
Created: February 03, 2011
This kit provides an internally baffled housing which enables the fuel pump port on the engine block to be used to vent the crankcase. The kit also includes fasteners and gaskets to mount the fitting but does not include a hose fitting and hose.
LUBRICATION - Oil, what it does and how
Created: February 03, 2011
It’s criminal. Folk spend fortunes putting together super-sonic motors, only to skimp on the oil they use. Why? Oil’s oil right? Wrong. Even if it’s a standard engine, it deserves TLC considering it's extremely hostile working environment.
LUBRICATION - Temperature critical
Created: February 03, 2011
The correct running temperature of the oil is perhaps even more important than the water/coolant temperatures - so let us consider how to control them. Mainly because it seems to be the most misunderstood of the whole process, and oil cooler fitment almost a reflex when over-heating occurs where a tuned engine of any type is concerned. And in many cases on standard production road cars for that matter.
Detailing The Engine & Under The Hood
Created: January 25, 2011
Did you know a detailed engine increases the resale value of your car?  It's a well-known fact that people who take the time and effort to detail their engines also take better care of their cars.
Created: September 21, 2010
...
Longer Connecting Rods in a Mini Cooper
Created: August 05, 2010
Longer rods provide for a longer dwell at piston TDC, keeping the combustion chamber small for a longer period as the expanding gases push against the piston. This extracts more power from a given air/fuel mixture thus increasing combustion efficiency.
Mini Automatic to Manual Conversion Basic Information
Created: February 24, 2010
Mini Automatic to Manual Conversion Basic Information The following is an overview of the steps to convert a Mini from an automatic transmission to one with a manual transmission/gearbox. It is not a step by step description of all the possible combinations you ma...
Created: November 06, 2009
The MTAA-B Series Kit was designed to install Honda’s B Series DOHC engines into the Austin America, Morris, MG, Riley, Vanden Plas, Wolseley, 1100's, and 1300's. , upgrading the Classic Austin America's A-Series engine with today’s most trusted engines built by Honda.
VTEC Conversion Kit MTK Installation Manual
Created: March 19, 2009
VTEC Conversion Kit MTK Installation Manual courtesy of MiniMania.com
VTEC Conversion Kit MTB2 Installation Manual
Created: March 19, 2009
VTEC Conversion Kit MTB2 Installation Manual
“BACKWARD COMPATIBILITY” IN NEW ENGINE OILS ?
Created: November 27, 2007
This newsletter is going to cover a recently discovered subject matter of the very most importance to everyone who owns vehicles of any kind, be it, automotive, trucking, construction equipment, etc. The results are in with very dismaying reports concerning the newest API engine oil specifications, SM / CJ-4
MTD Installation Manual for Classic Minis 1959-2001
Created: October 04, 2007
The purpose of this kit is to make your Honda VTEC installation easy and hassle free. We have taken the research and development headaches out of the install so that you do not have to deal with all of that.
Mini Cooper Harmonic Damper
Created: January 25, 2007
MINI Cooper Harmonic damper is designed to balance our the vibrations inherent in all engines. The same theory of operation applies to both Classic and BMW MINI Coopers
Created: January 08, 2007
About a year ago I read about the reduction of zinc dialkyl dithiophosphate (ZDDP) in the oils supplied with API approval that could affect sliding and high pressure (EP) friction in our cars. The reduction of these chemicals in supplied oils was based on the fact that phosphates reduce the effectiveness and eventually damage catalytic converters and introduce minute amounts of pollutants into our atmosphere.
Created: September 22, 2006
Last time we chose a manifold based on flow volumes, and a carbie based on personal choice, but which combination is best on this engine?  With the engine finished, it is time to look at a variety of carburettors, inlet manifolds and exhaust extractors, to fnd the most suitable combination. There are a lot of fgures, but they are necessary, so bear with me.
Project Small Bore, Part 2: Cylinder Head
Created: July 24, 2006
Last time we started building a small-bore engine for maximum power. But there is no point having a good engine and putting the wrong head on it. I'm going to use the 12G202 head, as these are the best to modify for our purposes. They are a bit smaller than the 12G295 or 12G206 heads, which gives you a bit more metal to play with when grinding. As far as a standard head goes, you can't go past the 12G295 or 12G206.
Created: July 21, 2006
We all long for the power and torque available from a 1275cc engine, but with these becoming more expensive and harder to find, we’ll take a look at how to get some decent power from the smallbore engines. Graham Russell of Australia shares his ideas.
Upgrades for Fuel Injected Minis
Created: March 24, 2006
We at Mini Mania have been very satisfied with our experience of being able to help almost any Mini Cooper owners when asked the question ‘How do I make it better’.  With our 30+ years of owning and racing Minis we think we have done almost anything you can imagine.
Created: March 10, 2006
Celebration Special: Order any of the Swiftune products for delivery in the middle of April and save hundreds of dollars.
Spark Plugs Overview Classic Mini
Created: March 08, 2006
The following article was originally found on the NGK web site here. Spark plugs are one of the most misunderstood components of an engine. Numerous questions have surfaced over the years, leaving many people confused. This guide was designed to assist the technician, hobbyist, or race mechani...
Created: January 30, 2006
DEVES rings and ring sets are based on detailed engineering drawings as well as actual engines. They are manufactured for almost all current American and Foreign engines, with some model coverage as far back as 1928! All DEVES rings are checked for fit by a specially-designed light-beam microscope (if light doesn't get through, neither will oil), and they meet or exceed SAE, DIN or BNA standards.
DEVES Piston Ring Installation
Created: January 30, 2006
Are Deves Rings Hard to Install? NO! They install just like any other piston rings. To make it easy, we set up the rings and sets in envelopes and boxes.....
ARP Bolts & Fasteners
Created: January 28, 2006
Fastener Retention Overview There are three methods that can be employed to determine how much tension is exerted on a fastener; using a torque wrench, measuring the amount of stretch, and turning the fastener a pre-determined amount (torque angle). Of these methods, use of a stretch gauge is the most accurate.
Created: August 08, 2005
While the ULTRIK VTEC Subframe makes an engine swap easier, there are still several challenges to overcome when installing the Honda engine in your Classic Mini.
Created: August 06, 2005
Complete 1380cc Supercharged Motor Serious Horsepower for the serious driver! Mini Mania has developed and produced the ultimate in bolt-on performance for the A-Series motor. Modern technology in compressors, modern manufacturing and Mini Mania engineering have resulted in serious performance improvements unheard of in A-Series history.
Pistons - Mega piston performance report- Classic Mini Cooper
Created: July 14, 2005
Pistons - Mega piston performance report The two other articles I have done on this site concerned what pistons are all about, different design and construction pros and cons, material specs, ring set-ups and so on. Under 'Pistons - Favourable features for maximum performance' it would seem that th...
Engine - Metro engine identification data
Created: August 12, 2004
A word of warning - whilst the data given here is as accurate and complete as I could make it without 6 months-worth of hermit-like investigation, there are bound to be oddities. Austin/Morris, BL/Austin Rover Group/Rover were never dedicated at keeping 100% correct records, particularly post 1970 - that's why Heritage really struggle with trying to identify cars manufactured after 1969. The Metro data - or lack of it - proves the point. It's nothing like as comprehensive as the Mini stuff.
Mini Cooper Supercharger Pulley HP Benefits
Created: December 09, 2003
Mini Cooper Supercharger Pulley HP Benefits
Crankshaft - Standard production crank identification
Created: October 27, 2003
Below is a list of crankshaft identification data by forging or stamped numbers - yes, contrary to what many say/express, all cranks are forged. None are cast. They wouldn't last 2 minutes in an engine if they were cast - they'd be way too brittle. The differences are in the material used,...
Engine - Identification Data UPDATED
Created: September 05, 2003
If you have the engine tag still attached to the engine - just in front/below the thermostat housing - or perhaps the original engine number in the log book then the following should help you determine which engine you have. For Metro units, see 'Engine - Metro identification data'.
Engines from Mini Mania
Created: August 01, 2003
Our new Engine Cost Estimator tool enables you to choose which parts you want to use to build your engine and then to get an estimated price based on those parts. Simply select the parts required, and then click on the 'Get an estimate on this build now!' button and the total estimated price will be calculated and emailed to you.
MinComp 1380
Created: August 01, 2003
...
Oil Gallery Plugs
Created: July 23, 2003
...
Created: September 19, 2001
Some folk have tried the suggestions regarding lowering induction charge temperatures - and have been astonished at the results. Others have got the wrong end of the stick, and found a myriad of problems. So here's a quick trip through what it's all about to add real on-track performance at a modest outlay.
ENGINE - 1098, Initial Tuning
Created: April 03, 2001
The 1098 (1100) engine has had a lot of bad press over the years - largely because of early experiences when trying to tune the motor brought about problems with the then standard components available - they simply were not up to taking any real punishment as experienced in racing.
ENGINE - 998 TUNING, FURTHER OPTIONS
Created: March 05, 2001
Following on from the easily bolted on performance enhancing components out-lined in the stage one section, we need to consider where to go to get more power output.
ENGINE - 998 TUNING, BOLT-ONS (STAGE ONE)
Created: March 05, 2001
The 998cc engine is a very robust and tunable unit. It is also the most common engine found in standard Minis. Despite the lure of the much-advertised 1380cc alternatives, many simply want to get a little more from what they have at reasonable outlay.
LUBRICATION - Oil pumps
Created: January 24, 2001
Essential to the well being of every engine is its oil pump and oil. Much in the same way as the heart and blood is deemed relatively important to us humans! It’s also another of those greatly misunderstood and, unfortunately, misrepresented subjects connected to engines.
Created: January 19, 2001
This is another of those subjects that crops up on the message board frequently. I am constantly surprised by the number of engine builders - or people who charge other folk for building engines at any rate - that never hand out such an information sheet. It seems pretty daft to me that having taken a wad of money off of a customer for an engine you've lovingly put together, you'd want to help that person get the very best out of the engine.
Centre Main Cap Strap Fitting Instructions, CMS10
Created: December 05, 2000
This strap is used to give support and strengthen the centre main bearing cap on small-bore engines (850/998/1098cc). It helps counter the problems caused at higher rpm where crankshaft flex (‘whip’) causes the standard cap to move (‘shuffle’) leading to bearing failure and possible breakage of the main bearing caps. In particular, where higher rpm than standard will be the norm – i.e. in excess of 6,000rpm. Especially where this is for extended periods.
Austin Mini FLYWHEEL & CLUTCH- General information
Created: November 27, 2000
If there's one subject that gets washed over when transplants or modifications are discussed its the flywheel and clutch assembly. There also seems to be a widely held belief that up-rating an engine from anything other than standard automatically requires a ‘competition clutch’. This, as with many other subjects concerning the Mini, is a myth.
FLYWHEEL & PRESSURE PLATE- Technical advances
Created: November 27, 2000
Great leaps forward in technology since the Mini’s inception have been constantly applied to all forms of automotive applications. The Mini flywheel and pressure plate are no exceptions. If for no other reason than weight reduction - an admirable one considering the effects it can have (see 'Flywheel & Pressure Plate - Effects of lightening' for benefits of lightening).
FLYWHEEL - Verto type, injection
Created: November 22, 2000
The advent of ECU-equipped fuel injection saw the need for a trigger system to provide the ECU with information on engine speed and piston position. In their infinite wisdom, Rover decided to fit a reluctor ring into the rear of the already humungous iron flywheel section. Identical in all aspects to the non-injection flywheel except for this reluctor ring and the raised ridge it is fitted into.
FLYWHEEL & PRESSURE PLATE- Effects of lightening the assembly
Created: November 22, 2000
How does this affect performance? Not as many folk believe, that’s for sure. For a start, lightweight flywheel/clutch assemblies don’t necessarily give rough running at idle, particularly where a performance cam is used.
FLYWHEEL - Pre-Verto types
Created: November 21, 2000
With the exception of the fact the two-piece flywheel is two pieces bolted together - this and the later one-piece cast item can be treated as the same thing. They will universally fit all transverse engine cranks from 1964 onwards, so that should be easy enough. If all you can get is the hulking great 1300 type, then this too is as universal to fit, but I highly recommend you get that extra cast lump machined off of the outer edge as a bare minimum.
FLYWHEEL - Verto types (not injection)
Created: November 21, 2000
There is only one version of this flywheel as standard, and fits all A+, Verto or Valeo (same type, different manufacturer) installations. And it’s heavy. Very heavy. Those up-rating power outputs in later Minis bearing this set-up were stuck with it. It is possible to shave a few ounces off this chunk of iron, but is difficult - especially for the DIY-er - and not cost effective when paying to have it done.
Created: November 03, 2000
Engine mountings are a whizz to fit as the Mini ones fit straight onto any of the other units. Just remove the Metro/AA/1300GT ones and swop the mounts over from the Mini unit. If they’re split, fit new ones, they’re cheap. If using the AA/1300GT unit - it's advisable to cut off the 'wings' on the front plate that carried the engine mounts on the radiator end.
ENIGINE TRANSPLANTS - Changing FDs and speedo drive ratios
Created: November 02, 2000
If you’ve decided the FD fitted isn’t what you want, changing the FD is possible without separating the engine from the gearbox. Removing the diff case will allow you access to the diff assembly to change the crown-wheel, and access to the gear-change linkage.
ENGINE TRANSPLANTS - Clutch and flywheel assemblies
Created: November 02, 2000
To go in to all the possible permutations would take a few chapters on it’s own. Suffice to say that the Metro had a few weirdo fitments such as cable operation, an in-line ‘damper’ (some got fitted to Minis too - eek), and ‘top-hat’ plunger and rod bearing operation. The Mini only has two -
ENGINE TRANSPLANTS - Engine to gearbox fitment
Created: November 01, 2000
Assembling the engine to gearbox (transmission) is explained and simplified in this article. Contrary to popular mis-guidance, all BBUs will fit all four-syncro gearboxes. It was only the three-syncro boxes that varied in casting dimensions causing hassles where 1275s were applied to 850/998 gearbox casings. The longer throw and bigger crank and rod assembly dimensions fouled the sculpted areas in the gearbox case,
Classic Mini Cooper ENGINE TRANSPLANTS -
Created: October 31, 2000
Is this familiar? - You take the small one out; you put the big one in. In, out, in, out, shake your fist about, you do the hokey-cokey and you turn around, that’s what it’s all about...kinda sums up the situation many folk find themselves in when attempting to endow their beloved Mini with a more impressive turn of speed.
1275cc A Series Engine Color Schemes, Sprites & Midgets
Created: June 19, 2000
Only engines bearing a 12CC engine no. prefix were painted in British Motor Corporation Engine Green (the color somewhere between sage green and olive green applied to the power units in most BMC motor vehicles, including all the Sprite and Midget variants prior to 1967). This equates to roughly the first year of 1275 production.
Mini Engine Performance Enhancement
Created: June 19, 2000
Standard Minis have always been slower than their handling was capable of. Fortunately, many people have devoted their careers to making Minis go faster. As a result, you can fit your Mini with a double overhead cam 16 valve cylinder head, a turbocharger, and programmable electronic fuel injection.
Cooper Engine Tuning Data
Created: June 14, 2000
The tables below shows the factory tuning specifications for the various models of Mini Cooper. If your engine is modified, these settings may no longer be valid or provide safe operation of your engine. These specifications are those as given by British Leyland at approximately the end of Mini Cooper S production in 1971.
Cooper Engine Data
Created: June 08, 2000
A comprehensive and detailed table of Mini Cooper engine specifications.
Installing Mini Main Studs
Created: April 10, 2000
On 2" inch main 1275 engines the use of main studs gives a solid improvement over the stock bolts. Factory bolts, at the very best, only have 65% of the clamping force of an ARP stud, and consider that the combination of the firing load and inertia at RPM cause loading's that amount to thousands of pounds. On the 1275 Mini there is something to look out for that doesn't arise on an inline engine. Due to the proximity of the gear box webs at both ends, there is not enough clearance for the nut.
Created: April 07, 2000
When Omega quit making A-Series pistons, Mini Spares took it upon themselves to design and build a better Piston. Recruiting the AE Hepolite Group for their unquestionable and renowned design and manufacturing expertise, the goal was to produce the most robust piston possible given reasonable cost and weight limits. Applying current technological advances incorporating their very latest hi-spec AE109TF lightweight alloy and special double heat treatments, the result is an extremely durable piston that will withstand greater cylinder pressures at higher RPM than any other currently available.
Created: February 15, 2000
"Turbo" main bearings were designed by Leyland’s engineers to meet a perceived need. It was decided probably by both theoretical calculation and practical test that the turbo Metro engine with its increased bearing loads needed a better bearing, so what they did was remove the oil groove from the bottom bearing shell giving roughly 30% more bearing area.
Torsional vibration damper ring 12A367
Created: January 30, 2000
This is designed to fit either the original type Cooper ‘S’ crank ‘V’ pulley or tooth belt water pump drive pulley. Each pulley should be balanced with its respective crank assembly. It is strongly advised that each component should be balanced individually and check balanced as an assembly.
Piston Fact File
Created: January 30, 2000
Over the years, there have probably been a dozen "stock" 1275 pistons. Currently, three different designs are available from AE/Hepolite as "stock" replacements. All have an 8.4cc dished top, but compression ratios are carried by changing pin height (Pin height is the distance from the top of the piston to the center of the wrist pin- see dimension "A" shown here).
Water pump toothed belt drive, C-AEA536
Created: January 30, 2000
This system has been designed and developed for use primarily for racing where a positive drive system is demanded to avoid fan belt loss problems caused by out of line pulleys and ill fitting belts.
Toothed belt drive for charging system C-AEA536A
Created: January 30, 2000
The large alternator/dynamo pulley is driven from the water pump pulley by a separate belt, thus ensuring the vehicle is still driveable should the charging system belt fail as the water pump will still function. Do not over tighten belt. Correct tension is when you can easily twist the belt through 90°.
Sureflow oil pump C-AEG413
Created: January 30, 2000
Being the heart of the engine, it is obviously essential that the pump is in prime condition when fitted. Due to robotised manufacture of the commercially produced pumps, tolerances have been opened up to facilitate rapid production and assembly.
Steel four bolt main cap, C-AGA619
Created: January 30, 2000
This cap has to be line bored and thrush washer faces machined before use. It is uni-directional and must be fitted with the ‘F’ stamped in one side facing towards the front
Steel four bolt main cap set C-AGA621
Created: January 30, 2000
These caps must be line bored and thrust washer faces trued up before use. They are not suitable for ‘S’ blocks. The centre main must be fitted with the ‘F’ stamped in one side facing the front (water pump) end of the block.
Oil Pressure Regulating Kit, HPS4
Created: January 30, 2000
This kit includes a new oil galery plug with an adjustable knob and a washer which is used as a spring seat in the plug against the relief spring. This makes a playform for the adjuster bolt to adjust the engine oil pressure.
Oil Pump information & part#
Created: January 29, 2000
Being the heart of the engine, it is obviously essential that the pump is in prime condition when fitted. Due to robotised manufacture of the commercially produced pumps, tolerances have been opened up to facilitate rapid production and assembly.
Belt drive for charging systems C-AEA536
Created: January 29, 2000
This kit is an ‘add on’ for the C-AEA534 toothed belt water pump drive for the charging system. The large alternator/dynamo pulley is driven from the water pump pulley by a separate belt, thus ensuring the vehicle is still driveable should the charging system belt fail as the water pump will still function.
Engine Run-in, MINI
Created: January 29, 2000
Installing a new rebuilt engine in your car will give it a major “shot in the arm” in any number of ways. In order to get the most of this change we suggest that you take the time while the engine bay is empty to
Engine Stabliz
Lower Engine Stabilizer, MSSK1
Created: January 30, 2000
This kit is designed to greatly improve engine stability on all Minis, and derivatives utilizing the engine and front subframe assembly from the Mini. It is particularly useful on the later rod - change type gearbox
Mini engine stabilizer steady bar, MSSK1300
Created: January 30, 2000
This is an auxiliary steady bar kit and should not be used to replace any other standard fitment parts that have broken. 2.Remove the radiator support bracket from the radiator and the thermostat housing.