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The cap'n The cap'n is offline
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Join Date: Nov 2001
Location: Santa Maria, CA
Posts: 1,051
914 and 2 liter 911 clutches are the same. At one time the 914 had a different disc (4 springs vs. 6), but they interchange. Same release bearing. A bus pressure plate (or "cover") is different, and uses a different release bearing in a different bell housing. It also lacks provision for the dowel pins that locate it on the flywheel. The bus flywheel 'may' be cut differently, as the ring gear step is used to center the cover in lieu of the missing pins. The bus cover won't work with a 914/911 setup because of differences in the configuration of the fingers of the spring, which will not accept the flatter bus release bearing design. At least one bus disc will work with the 911/914 pressure plate, and in fact it's offered as a lower cost option by some popular suppliers. The 2.2 engine, which made its debut in the 1970 MY, uses a "flat" unstepped flywheel and a completely different clutch assembly, utilizing a release bearing that is pulled toward the transmission, not pushed toward the flywheel. Any engine up to the 2.7L can be retrofitted with the 2 liter flywheel and used in conjunction with the 901 transmission and clutch. As the crankshaft bolt pattern is clocked differently on the 2.4 and 2.7 engines, the flywheel TDC mark will be in the wrong place when backdating the flywheel.

The Cap'n
Old 05-17-2014, 12:56 PM
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