× 1-800-946-2642 Home My Account Social / Forum Articles Contact My Cart
Shop Now
Select Your Car Type Sale Items Clearance Items New Items
Classic Mini flywheel pressure plate strap

Classic Mini flywheel pressure plate strap

Classic Mini flywheel pressure plate strap

Classic Mini flywheel pressure plate strap

Classic Mini flywheel pressure plate strap
Part No: 2A3658
Fits the following:
Classic Mini
These are the straps held on by 2A3659 bolts on the diaphragm type flywheel. There are 2 per bolt making 6 in total as standard but on performance flywheel and clutches we recommend 3 straps per bolt to minimize stretching. Although these are genuine check the holes and finish so bolts enter freely as they sometimes are roughly finished.Only use C-2A3659 and C-2A3659 bolts for anything other than standard as they are flanged and in high grade material.

If the pressure plate clutch plate friction face needs re-surfacing, get it machined to clean it up. Make sure the engineering company doing the job records the amount taken off, as the recorded amount needs removing from the tops of the 'horns' that stick up to ensure proper clamping force is achieved. If this is not done, clutch slip is inevitable. If using a pressure plate of unknown history, it is IMPERATIVE the clutch drive straps are set at the correct height. Many get this wrong and end up with a slipping clutch for some seemingly unfathomable reason. The following should also be carried out if the flywheel has been machined, or is also of unknown history:


-         Place the pressure plate 'horns' upper-most on something to hold it off of the work surface but not interfere with clutch plate of flywheel


-         Place the clutch plate in position, with the protruding primary gear spline boss on the underside facing the work surface


-         Place the flywheel in position


-         If the drive straps are holding the flywheel up, or are under tension pressing on the pressure plate 'horns', more spacer-washers/shims are needed between the drive straps and flywheel


-         If there's a gap between the drive straps and pressure plate horns, the spacing between the straps and flywheel needs reducing


-         If no drive straps are fitted, using a straight edge or drive strap fitted to one of the horns, measure the existing gap between flywheel surface and underside of straight edge/strap, and make suitable spacers to this measurement


-         Where extra drive straps are fitted, as in racing (3 on each location instead of the original two), it is essential to machine the thickness of the drive strap off of each pressure plate 'horn' and spacer to regain correct diaphragm clamping action to avoid clutch slip


The idea is to set the straps so that when they are in their 'as assembled' position, they are neither under tension, nor well clear of the pressure plate horns. They should be JUST touching. Under tension the clutch will slip due to decreased clamping pressure. Too far clear may cause disengagement problems.


Related Technical Articles:
Classic Mini Cooper Flywheels & Clutch page 40
Created: December 21, 2018
View the selection of Flywheels & Clutches for the Classic Mini Cooper from the Mania Catalog as a PDF. Find a Part No. in the catalog. Type or copy/paste it into the search box to find it on the website.
Austin Mini Cooper 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.
Classic Mini Clutch Design and Technical description
Created: February 16, 2000
One of the more common questions asked by Mini owners is "why doesn't my clutch disengage properly?" or "why is it hard to engage gears?" The usual symptom is that the clutch engages right at the floor and you find yourself embedding the pedal in the carpet to avoid grinding gears. Given that the clutch worked properly when the car left the factory the obvious answer is 'wear'.
DIAPHRAGM SPRING - Pre-Verto types
Created: December 04, 2000
These are the shallow cone-shaped objects that the release bearing pushes on, with a steel band (disc spring) on the underside that presses against the flywheel. This provides the force on the clutch plate that ultimately passes the torque to the wheels, and is available with different spring rates/tensions dependent on the application.