Notices
924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
Sponsored by:
Sponsored by:

quick timing belt question

Thread Tools
 
Search this Thread
 
Old 09-26-2009, 04:42 PM
  #31  
Reimu
Drifting
 
Reimu's Avatar
 
Join Date: Jun 2006
Location: NC Triad
Posts: 2,599
Likes: 0
Received 1 Like on 1 Post
Default

Since we're on the topic of timing belts...

Do they often just strip without warning or is it common for something to seize and rip out the teeth?
Mine ripped out a bunch at around 4krpm with no warning on a 3 year old belt, just wanting to diagnose.
Old 09-26-2009, 06:47 PM
  #32  
944meister
Pro
 
944meister's Avatar
 
Join Date: Apr 2008
Location: NW
Posts: 521
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by CameronKame
Mine ripped out a bunch at around 4krpm with no warning on a 3 year old belt.
and there's your problem, replace belts every 30k(early)-45k(late) miles or two years, wich ever comes first.
Old 09-26-2009, 08:00 PM
  #33  
944Ross
Rennlist Member
 
944Ross's Avatar
 
Join Date: Dec 2008
Location: NM (ABQ)
Posts: 2,238
Likes: 0
Received 7 Likes on 7 Posts
Default

Originally Posted by CameronKame
Since we're on the topic of timing belts...

Do they often just strip without warning or is it common for something to seize and rip out the teeth?
Mine ripped out a bunch at around 4krpm with no warning on a 3 year old belt, just wanting to diagnose.
I've got two belts removed from cars with documentation showing them to be 6 - 8 years old, 20-25k miles and they have absolutely no evidence of cracking or wear. Would I use them? Hell no. But like I said earlier, I'm convinced failures like yours are most often tensioner or water pump problems that ruin the belt.
Old 09-26-2009, 08:16 PM
  #34  
roman944
Drifting
Thread Starter
 
roman944's Avatar
 
Join Date: Oct 2007
Location: Rochester, NY
Posts: 2,684
Received 17 Likes on 12 Posts
Default

Originally Posted by CameronKame
Since we're on the topic of timing belts...

Do they often just strip without warning or is it common for something to seize and rip out the teeth?
Mine ripped out a bunch at around 4krpm with no warning on a 3 year old belt, just wanting to diagnose.
well, I am pretty sure that my failure was caused by the balance shaft belt

my car still ran fine, I wish I had known what to check for - I would have checked the belts first thing and taken out the balance shaft belt - would have been MUCH cheaper and faster then what I ended up with

oh well, live and learn

rebuilding the head here at home - what parts would be needed? new valves obviously, springs, guides? what can be done to the head itself as far as machine work (nothing extreme)?
Old 09-26-2009, 08:19 PM
  #35  
jderimig
Racer
 
jderimig's Avatar
 
Join Date: Jun 2006
Location: North Canton, OH
Posts: 368
Received 3 Likes on 3 Posts
Default

What about age of the belts on the shelf?
Old 09-26-2009, 10:22 PM
  #36  
Reimu
Drifting
 
Reimu's Avatar
 
Join Date: Jun 2006
Location: NC Triad
Posts: 2,599
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by 944Ross
I've got two belts removed from cars with documentation showing them to be 6 - 8 years old, 20-25k miles and they have absolutely no evidence of cracking or wear. Would I use them? Hell no. But like I said earlier, I'm convinced failures like yours are most often tensioner or water pump problems that ruin the belt.
Yeah that's what I was thinking. Guess I'll just replace the pump/thermostat, wouldn't hurt to have a good one in.



Quick Reply: quick timing belt question



All times are GMT -3. The time now is 05:28 PM.