Server Lease Renewal/Software Licenses
Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 6th, 2021. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help... THANK YOU!
Welcome to RennTech.org Community, Guest
Search the Community
Showing results for tags '2.7'.
A few months ago I got lucky and picked up two non running Boxster engines for little money. One M96.21 (2.7 L) with a failed IMS and piston / valve collision. The other 2.5 had a dropped sleeve that had resulted in a shattered piston on #1. In order to be able to "mix-and-match" remaining good parts I am trying to figure out (beyond part numbers from PET) what the real differences are in terms of basic internals between these two engines. From comparing / measuring, I believe the following parts are identical: - Case halves - Heads with valves and valve covers - Connecting rods and bearings, wrist pins etc. - IMS to exhaust cam chains - Chain guides, tensioners etc. Slightly different (but interchangable) are: - Crank carrier; the main bearings are mirror images 2.5 vs. 2.7, but offsets and angles are the same. Also the 2.7 has a different design for the chain that runs from crank to IMS shaft; gear vs. double row of teeth. - IMS shaft, for the same reason as the cranks are different. So AFAIK, the only real difference is in the pistons. Kind of important to have this reconfirmed before mixing-and-matching parts... The forum's input would be very welcome. Joost