928newb

Can someone please tell me the correct timing belt tension (in ft/lbs or nm)
for a 1986 928 S?

Thanks in advance

dprantl

The correct tension is set using the factory P9201 belt tension tool ($$$) or the Kempf "bending" tool. Don't try to do it any other way (especially not on a 32v 928), the Kempf tool is only ~$60 and is very easy to use.



http://members.rennlist.com/pirtle/tbelt.html

Dan
'91 928GT S/C 475hp/460lb.ft

jeff spahn

Or put a porkensioner on and forget about having to worry about keeping your tension set.

dprantl

^^^ or that. I have one on my car now for over 40k miles/4 years now with no issues.

Dan
'91 928GT S/C 475hp/460lb.ft

928newb

I will get a pk tensioner.

For educational purposes, does someone have the tension data?

davek9

the only tension data would require the Porsche tool and that's listed in the shop manual.

Replace the static tensioner with the dynamic Audi unit and forgetaboutit

dr bob

There is no simple lbs/ft method of adjusting or verifying the tensioner settings. On some cars you can adjust a spring tensioner arm preload with a torque wrench, but that's not an option with the compressed-belleville-washer tensioner design on the 928. Instead, the tension on the belt itself is measured, based on its resitance to bending (the newer factory tension tool $$$ method) or resistance to twisting (using the aftermarket Kempf tool). The Kempf tool is more consistent especially if you do the work infrequently, and significantly less expensive to buy.

The PKTensioner mentioned above is a more self-adjusting tensioner, using a proven Audi mechanism and pulleys on a 928-specific mounting. If this is your first time doing this (sounds ike it is...), you can probably install the PKTensioner for a cost roughly comparable to buying a factory rebuilding kit for the original tensioner, all the rollers, bearings and bushings, plus the tensioner tool. The 'wearing' parts of the PKTensioner are readily available, when you rack up enough miles to do a couple more timing belt replacements. With no oil-filled cavities an boots to deteriorate, the PKTensioner maintenance is much less frequent than the factory pieces.

Leon Speed

With the original tool it is 5.0 +/- .25 I believe (this is without checking the WSM). Don't know what measure

Randy V

There is no 'tension data' per se, other than the tension readings on the Porsche tensioner or Kempf tensioner tools.

You have chosen a proper forum name - perhaps after a few years in the trenches we'll upgrade you.



Read through the New Visitor...FAQ thread posted at the top of this forum to get off to a good start.

Avar928

Really need the Kempf tool to check tension if it's correct.

GregBBRD

If only it was this simple.

The Porsche factory 9201 tool is calibrated in "belt units", which have never been defined, by anyone.

Guessing is impossible.

928newb

OK I hear you, gents. Gotta get myself one of them pktesioners then...

GregBBRD

That's simple.

Roger at 928 R Us.