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V-Belt torn twice in a week

Old 09-16-2018, 02:57 PM
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vchris1987
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Default V-Belt torn twice in a week

Hello fellas,

keeping it short.
My 2008 CTT has been in the garage for a month replacing both Turbos, valve cover gaskets, blow off valves, coils, and every fluid including PDCC reservoir. Shop is super experienced and the Job they did is superb apart from 1 thing.
When I went to pick up the car the V-belt was torn between the 3rd and 4th line. Shop was shocked, left it there and they replaced it. Picked up the car on Wednesday, after a small trip and back around 75 miles I parked the car in the garage.

Today I wanted to take it for a ride again and once I cold started same noise as the first time the belt was torn. I am sure that the belt is torn again although due the limited space I canĺt see evidence.

any thoughts what might be the culprit?
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Old 09-16-2018, 10:37 PM
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deilenberger
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Chances are a pully has been damaged or the idler is shot.
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Old 09-17-2018, 01:17 PM
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Petza914
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Originally Posted by deilenberger View Post
Chances are a pully has been damaged or the idler is shot.
...or the tensioner has a problem and is allowing some slack in the belt either upon initial motion or when it needs to spin quickly. Could also be that the alignment of a pulley or roller is not quite right (usually from bearing wear) and is allowing the belt tracking to move and contact something.
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Old 09-17-2018, 01:27 PM
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TRINITONY
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Why are you replacing both turbos? Just curios as I've read on here that they never go bad....
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Old 09-25-2018, 05:09 AM
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vchris1987
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Originally Posted by TRINITONY View Post
Why are you replacing both turbos? Just curios as I've read on here that they never go bad....
The engine has 120K miles, I had an oil leak from the left turbo and when we dropped the engine to take a better look there was a hairline crack. Even my mechanic had never seen a crack in a 957 turbocharger but I decided to replace both. We did some extra work since the engine was out and apart from this small issue with the belt the car works great.

All the parts and labour included the sum came to 2,400.00 Euros. Comparing to the prices I see hear for that amount of work, I am very pleased.
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Old 09-25-2018, 05:11 AM
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vchris1987
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Regarding the belt torn twice, we replaced again (no charge) belt tensioner and pulleys. Car is running great now.

The new headache is to sort out the outdated HU the car has but without compromising sound quality.
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Old 09-25-2018, 10:08 AM
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Originally Posted by vchris1987 View Post
The engine has 120K miles, I had an oil leak from the left turbo and when we dropped the engine to take a better look there was a hairline crack. Even my mechanic had never seen a crack in a 957 turbocharger but I decided to replace both. We did some extra work since the engine was out and apart from this small issue with the belt the car works great.

All the parts and labour included the sum came to 2,400.00 Euros. Comparing to the prices I see hear for that amount of work, I am very pleased.
Good to know, thanks!
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Old 09-25-2018, 02:32 PM
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Yes, your mechanic is very economical and it sounds like you did it right!
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