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cesarblanco

Vibrations and bad sound after coolant Pipe Replacement

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Hello, after coolant pipe replacement in a S V8 the engine sounds like this and I can feel small vibrations. I would appreciate any advice.

Regards

César

Edited by Loren

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The only thing that can affect the engine behavior, after replacing the plastic cooling pipes, is a leaking intake manifold gasket, a leak in the thin plastic tubes into the V of the engine or a small leak somewhere between both MAF and the manifold. If the CEL is not lit, is it still advisable using a diagnostic device, such as PIWIS, to check the engine actual values.

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Thank you very much for your support, RFM, I appreciated a lot your help.

I have removed the manifold to install it again very carefully (with new gaskets). In addition to that I will check the other two points you mentioned as possible origin of the problem. The thin plastic tubes into the V of the engine is this coolant vent line (94810601693) Picture 1? And the small leak somewhere between both MAF and the manifold could be in this part (Picture 2)?

247634_x600.jpg

nq1n.png

Thank you

César

Edited by cesarblanco

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Also check under the Y air intake. It is very easy to get the vacuum connection under there to hit the fan.....

Steve

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So as to see and hear on your movie, it can be only a small detail. It is not that one of the cylinders is missing or so, therefor the engine does not shake enough. Check all the specified items, including the theottle/manifold connection. If you cant see anything, use a PIWIS or similar diagnostic tool to find out whats wrong.

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PROBLEM SOLVED.

Thank you for all responses. After reinstall the manifold very carefully with the help of a friend, now everything seems to work OK. In my first installation, with no help, probably the gasket at the rear side was bent slightly.

Here the engine with the new sound:



https://www.youtube.com/watch?v=PjOowlPzDoQ

Thank you for your support!

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