 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / Porsche / Porshe 944 / August 2006timing belt - anyone had this happen?
been channging the front seals on a 944S (seemed like a good idea), got all new rollers too (also seemed like a good idea), and decided to change the belts while it was all appart (yep, seemed like a good idea) - I've done this before, its usually easy to put the belt on - relive the tension, put the belt on, release the tensioner (or if early car, apply proper tension) and you are done - well not this time - it took me over an hour to get the belt on, finally I got it on by rotating the engine by putting a wrench on the cam shaft and pulling it onto the gears - it's now on, the car is properly timed, and it runs - but ----- the tensioner (this is an 87) is held hard against the stop by the belt tension - I don't hear that tell-tale whine, so belt is not too extremely overtinght, but it bothers me that the tensioner doesn't even come off the stops one iota - I suppose the belt is just a MM or two too short, though the teeth fit in the slots on the gears correctly - could there be any other cause that I should look for? I don't really want to break a belt on a 16V car, but then again ....  Signaturebill to email me, to to my web page, www.wbnoble.com and find my email or unscramble the following by removing spaces and correcting the obvious spelling errors wil lia m_b_n obl e at msn daught com -- Posted via a free Usenet account from http://www.teranews.com following up on this - I tried putting the original belt and original tensioning roller back, the and had the same problem - not long enough - WTF??? so, I took the tensioner assembly to my mill and enlongated the slot so it could retract another 3/16 or so - that helped, but still not long enough - I didn't have to fight to get the belt off when I removed it to change the seals - what the heck could have happened ? I'd really like to get this to where the tensioner actually is not on the stop. oh, by the way, the "S" cars use a wider and longer timing belt than the non-S cars, and a different tensioning roller. any suggestions, anyone?? > been channging the front seals on a 944S (seemed like a good idea), got > all new rollers too (also seemed like a good idea), and decided to change [quoted text clipped - 12 lines] > should look for? I don't really want to break a belt on a 16V car, but > then again .... SignaturePosted via a free Usenet account from http://www.teranews.com Could one of the rollers be larger than the one removed by a slight margin? > following up on this - I tried putting the original belt and original > tensioning roller back, the and had the same problem - not long enough - [quoted text clipped - 25 lines] >> that I should look for? I don't really want to break a belt on a 16V >> car, but then again .... I put all the original parts back, and it still didn't fit - taht's what baffles me - any clues? oh, and I miked the tensioning roller and the new one is about .010 larger - about what I'd expect for wear, so I don't think it's the roller - I don't see any way I could assemble this thing incorrectly - and moreover I've changed belts on 944s before - this is just baffling, but something must be interacting with the belt layout - darned if I can figure out what..... > Could one of the rollers be larger than the one removed by a slight > margin? [quoted text clipped - 28 lines] >>> there be any other cause that I should look for? I don't really want to >>> break a belt on a 16V car, but then again .... SignaturePosted via a free Usenet account from http://www.teranews.com Autistic perception? Not a mechanical problem! well, this is interesting - in my 85.5 NA manual, it says that the drive gear for the cam belt has a flange that must go away from the engine (next to the drive gear for the balance shaft) - so, thinks I - "Aha! that must be it" - I figured I must have put this drive gear in backwards - so, I pull the belt off, pull the gears struggle mightily to get the gear off the crankshaft without removing the plastic that forms the back of the timing belt cover - and guess what - there is no flange on the gear at all - so that isn't it - I have the gear sitting in front of me - it seems symetrical front to back as you would expect, the notch for the keyway is centered under a tooth, etc. But here's the interesitng part - it is cast with the part number 944-105-125-05. So, just to be safe, I look up in PET 6 (and also in the PDF you can DL directly from Porsche), and (it's MG1, SG 2) you find this part, item 14 on the exploded view, and the part number is 944-105-125-06. Well, there's another WTF moment. I'm going to put it back together and omit the balance shaft drive sprocket and see if I can see any reason why it isn't fitting right - this is very perplexing. There must be SOME answer to this problem.... > Autistic perception? Not a mechanical problem! SignaturePosted via a free Usenet account from http://www.teranews.com |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.