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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old August 4th, 2010, 21:36   #1
sawedoffgolf
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Default Did my turbo just **** the bed?

Well this morning went to take our 99 jetta tdi for a drive and got this nasty sound coming from the turbo area, can be heard distinctly through the air filter.

A local vw specialty shop was telling us that it's an "exhaust leak" which does not make sense to me because:
1. its only under partial throttle
2. its somewhat intermediate
3. the exhaust is not loud, same level of noise it has always been

Anyone got any input? heres a quick youtube video - http://www.youtube.com/watch?v=WOROhw66y6k
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Old August 4th, 2010, 21:55   #2
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Sounds like a cracked EGR pipe. Pull off the engine cover and you should be able to inspect both of them ("accordian" tubes) with a mirror. Follow the soot.
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Old August 4th, 2010, 22:49   #3
sawedoffgolf
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Will pull it out and check it tomorrow. Wouldn't that god awful sound be constant then if it was a egr tube? or only when the egr operates? because then i could just pull the line to test it.
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Old August 4th, 2010, 23:00   #4
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negative. Upstream of the EGR valve (towards the exhaust ports) you build manifold pressure independant of EGR flow.
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Old August 5th, 2010, 00:07   #5
Sbeghan
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I've had a similar problem. From 1000-2000 rpm under load it would make sound. Eventually tracked it down... twice... to a cracked EGR flex pipe (they don't really flex, they look like they do) and to a poorly installed gasket on the EGR system.
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Old August 5th, 2010, 07:06   #6
sawedoffgolf
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Yeah i am leaning towards the egr system right now thanks to greengeeker.
Tuesday afternoon i changed the shifter box and cables and removed the downpipe/egr stuff and cleaned out the valve and intake, I likely didnt tighten a bolt/nut, missed a gasket or even cracked one of the pipes(would be a great time to delete the egr)
Drove it all tuesday evening trouble free and then first thing wednesday morning it made that sound.

Will check the egr pipes after work and then update.
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Old August 5th, 2010, 12:10   #7
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Quote:
Originally Posted by sawedoffgolf View Post
.
Tuesday afternoon i changed the shifter box and cables and removed the downpipe/egr stuff and cleaned out the valve and intake,
pertinent information that should have been included in post #1.
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Old August 6th, 2010, 23:21   #8
sawedoffgolf
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Wasn't anything EGR related. I had some block off plates made and new gaskets, still makes the noise.
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Old August 6th, 2010, 23:31   #9
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all your intake manifold bolts tight?
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Old August 7th, 2010, 07:25   #10
sawedoffgolf
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One of them was a little loose, second to the far left while looking at the front of the car, tightened it at the same time.
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