Triple Groove A-plus Exhaust Valve 29.5mm Race Quality

Triple Groove A-plus Exhaust Valve 29.5mm Race Quality

Triple Groove A-plus Exhaust Valve 29.5mm Race Quality
Selected: C-AEG105
Triple Groove A-plus Exhaust Valve 29.5mm Race Quality
Exhaust Valve, Triple Groove, 29.5mm (1.16") Race
Qty:
$33.95
1.158" (29.4) dia exhaust valve for 12G940 casting.
Our race valves are produced in EN214N steel and rquire Manganese/Silicon bronze alloy valve guides. They are stellite tipped and use the later narrow, single collet groove and current valve head shapes. These valves are heat treated to eradicate wear from unleaded petrol As it is possible, even common, to swap one head for another on 1275 engines, Be aware that if the head has been worked on previously, it may have oversize valves; it may have undersize if seats have been installed. Unless you are 100% sure what is in your cylinder head, it is a good idea to remove a valve for accurate measurement. There are two lengths used (nominally 3.52" & 3.57") three different keepers, (wide, narrow, and three-groove) and many different head diameters! These valves are in stock at Mini Mania!
Note that 12G1316 (Smog-Type), all variations of the 12G940, and the latest CAM head castings all use the following 3.57" long valves. As it is possible, even common, to swap one head for another on 1275 engines, be aware that if the head has been worked on previously, it may have oversize valves, it may have undersize if seats have been installed. Unless you are 100% sure what is in your cylinder head, it is a good idea to remove a valve for accurate measurement. There are two lengths used (nominally 3.52" & 3.57") three different keepers, (wide, narrow, and three-groove) and many different head diameters.
Loading...
Loading...
Loading...
Related Technical Articles:
CLEARANCE
Created: October 27, 2016
Browse our selection of Classic Mini clearance items.
Classic Mini Cooper Intake & Exhaust Valves & Cam Followers - 30
Created: January 03, 2019
Standard Production & Competition Valves for all Classic Mini cylinder heads available in sizes to fit. Over-sized options with various collet designs will suite every need. Cam followers both stock, High Performance or race versions are also available.
Valve Stem Keepers
Created: October 10, 2011
Call them cotters, collets or keepers, these little items are often overlooked during a head rebuild. If yours are worn and need to be replaced, make sure you order the right ones. Minis used three different versions over the years.
Cylinder head - What can easily be achieved
Created: February 03, 2011
The engine build I recently covered in previous Mini Magazine issues developed into a bit of an ongoing 'project'. During a discourse with the editorial staff at Mini Mag, it was decided the build feature presented an ideal opportunity to demonstrate just exactly what such an engine build is capable of in days where it's generally believed you have to have an all-singing, all-dancing 1380cc engine to have an enjoyable road burner - leaving those with very limited budgets a little depressed.
MSE4 - Post 1992 unleaded stage 2 (Road Rocket) large-bore head
Created: October 23, 2000
Modified to give maximum performance gain for cost. Combustion chambers, inlet and exhaust ports extensively re-worked. Stone-ground finish in ports promotes ultimate fuel atomisation. Three-angle valve seats in head. Cooper S size valves with current maximum flow profiles and Tuftrided for durability/longevity when used with unleaded fuel (hence 'black' finish).
MSE3 - PRE 1992 unleaded Stage 2 (Road Rocket) large-bore head
Created: October 20, 2000
Modified to give maximum performance gain for cost. Combustion chambers, inlet and exhaust ports extensively re-worked. Stone-ground finish in ports promotes ultimate fuel atomisation. Three-angle valve seats in head. Cooper S size valves with current maximum flow profiles and Tuftrided for durability/longevity when used with unleaded fuel (hence 'black' finish).
Loading...
Loading...
Loading...
Recently Viewed Items