How do I tension the timing belt an 87 or later car using the built-in tensioner?
The self-tensioner on ’87 and later 944, S, Turbo and S2 allows accurate tensioning of the timing belt without tool P9201. The assembly achieves this by means of a spring whose preload is fixed to create the proper tension while the engine is cold. Loosening the correct bolts frees the spring up to do this task before retightening. The entire job is done from above the engine. You gain access to the belts by removing various things depending on which 944 variant you have. The 944, S, Turbo and S2 are all a little different. In each case you are removing hoses or boxes which carry air. The 944 has a coolant hose which may get in the way. The Turbo needs to have some of its plumbing removed. Once you have a clear view of the top portion of the two piece plastic belt housing, remove the 10mm bolts holding it in place and finagle it out. You now have a view of the tensioner assembly and belts. The belt should look fresh and not show cracking or shining. The next phase would, by some, be co
