Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

Belt tensioner rebuild thread?

Thread Tools
 
Search this Thread
 
Old 03-12-2019 | 12:43 PM
  #1  
vanster's Avatar
vanster
Thread Starter
Rennlist Member
 
Joined: Sep 2010
Posts: 2,328
Likes: 178
From: Oakland CA
Default Belt tensioner rebuild thread?

Is there a thread on rebuilding the belt tensioner? It looked good at first but I just noticed the rubber nipple is brittle.
Old 03-12-2019 | 03:06 PM
  #2  
rjtw's Avatar
rjtw
Burning Brakes
 
Joined: Oct 2002
Posts: 1,070
Likes: 106
From: Los Altos CA
Default

Old 03-12-2019 | 04:11 PM
  #3  
Chalkboss's Avatar
Chalkboss
Rennlist Member
 
Joined: Oct 2012
Posts: 2,402
Likes: 184
From: California
Default

Be careful to get the belleville washers stacked in the correct orientation. On mine someone before me had done it wrong.
Old 03-12-2019 | 07:09 PM
  #4  
Jim Devine's Avatar
Jim Devine
Three Wheelin'
 
Joined: Apr 2010
Posts: 1,272
Likes: 32
From: Sacramento, Ca.
Default

Not sure if it's your year or not, but as I understand it the early rubber boot on the tensioner is NLA. Greg Brown makes an adapter to use the later boot, but no personal experiance so double check.
Old 03-13-2019 | 02:53 PM
  #5  
vanster's Avatar
vanster
Thread Starter
Rennlist Member
 
Joined: Sep 2010
Posts: 2,328
Likes: 178
From: Oakland CA
Default

This is an 81, and Roger has just put a rebuild kit in the mail. Last one I tried to rebuild I knocked all the disk on the floor. Then I was at a complete loss so I bought a Porken. This time I'm going to be very very careful. I know GB likes the original unit better than the PT.
Old 03-13-2019 | 03:10 PM
  #6  
Ad0911's Avatar
Ad0911
Rennlist Member
 
Joined: Jan 2003
Posts: 1,965
Likes: 67
From: Netherlands
Default

I am following because hopefully some good info will be gathered. My stack of discs also came apart. I have everything cleaned and have a new rubber boot and a new Porkensioner (the old version). But I kinda lost faith in it since all this discussion about the travel of adustment not being long enough after a head reconditioning.
Old 03-13-2019 | 07:51 PM
  #7  
rjtw's Avatar
rjtw
Burning Brakes
 
Joined: Oct 2002
Posts: 1,070
Likes: 106
From: Los Altos CA
Default

Even if your stack of discs comes apart just assemble them in groups of five, there is no reason the washers themselves are not interchangeable. My ‘83 had seven such groups. I think I saw a thread mentioning that the earliest version(s) used six such groups. They must be oriented as shown. The key is the orientation, from the bolt end on left to boot end on right it’s this:
((((()))))((((()))))((((()))))(((((

And of COURSE if you haven’t seen my thread already where I rebuild the tensioner, redo seals and hoses and more, check it out: https://rennlist.com/forums/928-foru...oses-83-a.html

Btw in the above thread I refer to this link too, more great info: http://jenniskens.livedsl.nl/technic...4/mytip416.htm

Old 03-13-2019 | 09:17 PM
  #8  
Ducman82's Avatar
Ducman82
 
Joined: Nov 2009
Posts: 6,983
Likes: 18
From: Marysville WA
Default

i liked to slide all the discs on to a zip-tie as they came off. and cleaned them that way.



Quick Reply: Belt tensioner rebuild thread?



All times are GMT -3. The time now is 05:25 PM.