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V6 new timing belt tensioner failure (catastrophic)

3.4K views 6 replies 6 participants last post by  phil3315  
#1 ·
Hey, I just wondered if anyone else here has heard about problems with the timing belt tensioner on the V6 Passat (mine is ATQ). I had mine replaced 10,000 miles ago, along with the timing belt, water pump, drive belt, and drive belt tensioner, all of which were genuine VW parts from the dealership. Then today, it just failed today at 3000rpm on the interstate, so needless to say, the engine is toast :mad: . I did have a few minutes of warning, but I thought the ticking/thumping noise was coming from the alternator, or A/C clutch, and I was on my way to work, so I didn't think another mile or two would kill the alternator, etc. So you can imagine my surprise when the engine sudenly got very loud and lost power, along with the CEL illuminating. I thought I was doing the right thing by getting the timing belt and tensioner replaced, as the car had 117,000 miles, and there was no record of it being done. So now I paid $1100 to get that done as "preventative maintenance", and it broke anyway! The shop that I had it towed to said they've had alot of problems with the tensioners on these engines, and that VW should be responsible, as a premature failure of this type could only be a manufacturing/design defect. So I'm wondering if anyone else here has had a problem with the tensioners going bad at an early age, and if so, did you have any luck getting VW to replace it, or pay for catastrophic damage to the engine. I'm just puzzled, the car seems engineered and built very well, so how could they screw up on one of the most important parts in the engine, and then continue to produce defective ones until it gets the reputation that the shops are telling me about? So now I'm back to driving my 17 year old Cadillac for a few days, it has a horrible crash test rating, but it has 242,000 miles on it, and it's never had any catastrophic failures, or even left me on the side of the road, except for the two times let it run out of gas, but that wasn't the car's fault.
 
#2 ·
Damn, sorry to hear that Phil. I never came up with that problem myself, but i have heard of problems with tensionners on the B5's, includine 1.8T and V6. There was a few post in Club B5 on that, you might want to do a search on it. You probably have some recourse on this, check into it. Good luck with the repairs and keep us posted......................Rah.
 
#5 ·
What was the cause of the timing belt failure. My guess with new parts failing would be an error in installation. If the mechanics new the tensioners have a history of premature failure, shouldn't they warn you? I've heard of the AEB underdesigned tensioner, and experienced it. My wifes 1.8T's timing belt is so loose you can move it with one finger on the pulley, let alone push in 1.5" of slack. My V6 tensioner is still holding tight even 10,000 miles over it's scheduled TB change. The new TB kit was purchased for the V6, and it has an expiration date on the belt. This has leads me to believe it's not exactly the miles put on the car, but the age of the belt that is more important. IMO, you may have received an outdated belt, or something wasn't installed correctly. It may need to be taken up with the company who installed everything. Hope it is all taken care of for you in a low cost expediant manner. Good luck
 
#7 ·
Stranded In Daytona said:
Damn dude. . . I haven't heard of that either. My Cam chain tensioner is clicking... and out of two dealerships i have taken it to they said not to worry about it. Where in NC are you located at? I'm from the Wilmington Area.

Cam
I'm in Statesville, NC (near Charlotte) Interesting that you mention the cam tensioner, as I thought it was all on the timing belt, but I learned earlier today that there are separate cam chains on the back of the engine. It is possible that one of them broke, as they haven't taken the timing covers off the front of the engine, as it got towed into the shop at 5:30pm on Friday. They are going to check it Monday morning, and let me know, the timing belt tensioner was an educated guess on their part, since they've seen and heard of alot of problems with them. I spoke to the mechanic that installed the tensioner, and he said it was the new design tensioner that came in the kit, and he hasn't heard of failures with the new type tensioner. So I'm hoping that it really is the cam chain, because that will probably confine the damage to one cylinder head, and it will be covered under my warranty, as it falls under the "internally lubricated parts" coverage clause. So thanks for the glimmer of hope there, now I just have to wait until Monday to find out for sure.