View Poll Results: Have you had any of the following failures
Timing belt failure
![](https://rennlist.com/forums/images/polls/bar2-l.gif)
![](https://rennlist.com/forums/images/polls/bar2.gif)
![](https://rennlist.com/forums/images/polls/bar2-r.gif)
![](https://rennlist.com/forums/clear.gif)
15
23.08%
Counter shaft belt failure
![](https://rennlist.com/forums/images/polls/bar3-l.gif)
![](https://rennlist.com/forums/images/polls/bar3.gif)
![](https://rennlist.com/forums/images/polls/bar3-r.gif)
![](https://rennlist.com/forums/clear.gif)
8
12.31%
Cam chain tensioner failure
![](https://rennlist.com/forums/images/polls/bar4-l.gif)
![](https://rennlist.com/forums/images/polls/bar4.gif)
![](https://rennlist.com/forums/images/polls/bar4-r.gif)
![](https://rennlist.com/forums/clear.gif)
3
4.62%
Does your engine have 8 valves?
![](https://rennlist.com/forums/images/polls/bar5-l.gif)
![](https://rennlist.com/forums/images/polls/bar5.gif)
![](https://rennlist.com/forums/images/polls/bar5-r.gif)
![](https://rennlist.com/forums/clear.gif)
27
41.54%
Does your engine have 16 valves?
![](https://rennlist.com/forums/images/polls/bar6-l.gif)
![](https://rennlist.com/forums/images/polls/bar6.gif)
![](https://rennlist.com/forums/images/polls/bar6-r.gif)
![](https://rennlist.com/forums/clear.gif)
12
18.46%
Voters: 65. You may not vote on this poll
Poll - T Belt, Ctr Shft Belt, Tensioner Failure Poll
#1
Burning Brakes
Thread Starter
Join Date: Nov 2003
Location: Bay Area, California
Posts: 1,208
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Since misery loves company I would like to know how many others have suffered a belt failure. I personally had a counterbalance belt failure that dislodged the timing belt so I am including that in the poll. I have also seen three other 944S websites that show pictures of cam chain tensioner failures so I am including that.
I have been thinking about my event. There was an initial pop of the counter balance shaft breaking. For a few seconds before the engine quit, there was the buzzing sound of what I now believe to be timing belt teeth rubbing the broken counter shaft belt or something stationary. My boy I wish I had done that is this, suppose at the first sign of trouble I had depressed the clutch and switched off the engine? I did have time to do that, would I have saved the cost of a head rebuild? If just that balance shaft belt broke and I had stopped the engine in time the valves would not have hit the pistons. What do you think?
I have been thinking about my event. There was an initial pop of the counter balance shaft breaking. For a few seconds before the engine quit, there was the buzzing sound of what I now believe to be timing belt teeth rubbing the broken counter shaft belt or something stationary. My boy I wish I had done that is this, suppose at the first sign of trouble I had depressed the clutch and switched off the engine? I did have time to do that, would I have saved the cost of a head rebuild? If just that balance shaft belt broke and I had stopped the engine in time the valves would not have hit the pistons. What do you think?
#2
Big thirst, Sore Thumbs
Rennlist Member
Napoleon
Rennlist Member
Napoleon
![](https://rennlist.com/forums/images/ranks/veteran_marine_corp.png)
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
None for me.
But shutting off the engine definetely would have saved it
Porsche also should have run the waterpump off of the Balance belt rather than the T-belt
But shutting off the engine definetely would have saved it
Porsche also should have run the waterpump off of the Balance belt rather than the T-belt
#3
Burning Brakes
Thread Starter
Join Date: Nov 2003
Location: Bay Area, California
Posts: 1,208
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Sorry about that. I wanted to separate out the 16V cam chain tensioner failures from the rest of the data. You can only select one item.
#5
Burning Brakes
Thread Starter
Join Date: Nov 2003
Location: Bay Area, California
Posts: 1,208
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally posted by Fishey
I put - Does your engine have 16 valves?
because I was thinking you were asking if all my valves were ok (also known as no I have had no problems)
I put - Does your engine have 16 valves?
because I was thinking you were asking if all my valves were ok (also known as no I have had no problems)
Oh well I hope it is interesting.
#6
Drifting
Join Date: Nov 2003
Location: Vancouver, BC, Canada
Posts: 2,310
Likes: 0
Received 6 Likes
on
3 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Heh, I recently changed my belts, water pump, and front end seals...I discovered they hadn't been done in 10 years (car was in long-term storage) When I took it in to have the belts changed, the balance belt had already snapped...lord knows how long I was driving around like that...and the teeth were just starting to peel on the timing belt.
Man, I'm a lucky bastard.
Man, I'm a lucky bastard.
Trending Topics
#8
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Join Date: Nov 2001
Location: Dayton, Ohio
Posts: 7,262
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I have a 16V. No failures but it had a leaky waterpump when I bought it. I changed it out right away and this spring it's getting new belts. The belts are in good shape now but I need to do the front seals and it's worth it to put new belts on since I'll have it all apart anyway. The car also has a new chain tensioner pad and the PO gave me a spare new one (thanks, Joel).
#14
Burning Brakes
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
On my N/A, when I first bought it the PO told me he had just done the belts and produced the receipt for the parts (he worked as a tech at a Porsche dealer). A few months later I was driving it and it had a sudden loss of power. I parked, opened the hood, and saw belt "powder" around the timing cover, so I called for a flatbed and had it taken home (100 miles away). After opening it up, I discovered that the PO HAD changed the belts, but never replaced the rollers and tensioners, ( he bought 'em, wonder what he did with 'em) resulting in a frozen balance shaft belt roller, which shredded the teeth from the belt. Fortunately no damage to the timing belt so I just ordered the kit from paragon and replaced everything at one time. Hope he did a better job on customers cars...........
![Confused](https://rennlist.com/forums/images/smilies/confused.gif)