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2010 V70 3.2 NA Sounds like a diesel

Help, Advice, Owners' Discussion and DIY Tutorials on the third generation Volvo V70 wagon and XC70 crossover, and second generation S80. Are you an owner? Prospective owner? Get in here and join us! Start a new topic or comment on an existing thread.

2008-2016 V70
2008-2016 XC70
2007-2016 S80

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Year and Model: 2010 V70
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2010 V70 3.2 NA Sounds like a diesel

Post by avmedco » Mon Aug 22, 2016 11:16 am

Trying to diagnose engine noise, gas motor sounds like a diesel. 80k miles non-turbo 3.2 inline 6, runs well no error codes.
Car was not well maintained previously with long oil change intervals and had been running with clogged oil trap for a while. Sound is present from idle, hot or cold and varies with engine speed.

Seems to be emanating from top driver side in area of timing chain cover. I put a long screw driver to my ear at alternator, sounds normal. Did same with READ unit area. Noise is present but not as clear or loud as timing cover. Also it seems to be concentrated more towards the front of the two cam timing chain sprockets about where the vacuum pump mounts. I was guessing its timing chain tensioner and possibly guides.
Having read about the READ unit and not being familiar with this car I paid local dealer to diagnose. They said it was the vacuum pump and wanted $800. Did pump myself with new gaskets in ~2 hours. Noise is same.

I’ll it take back to dealer and demand the proper diagnosis I paid for (may be a battle) but hoping to have more info to leverage.

Anyone have experience changing timing chain, guides and tensioner? Costs?

Could the sound be conducted up through the chain drive from a bad READ and be louder out of the thinner metal of timing cover?

Thanks in advance for help/comments.

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Re: 2010 V70 3.2 NA Sounds like a diesel

Post by kcodyjr » Mon Sep 26, 2016 2:27 pm

I don't know the first thing about the 3.2 engines, but one time my old man thought my boss's van had a bad water pump, until he found out it was a diesel. Any seeping around the WP?
1997 850 GLT sedan, 152K and WHOOHOO!
RIP 1996 850 wagon, 201K, hit by a runaway 4-wheeler
RIP 1996 850 GLT sedan 5spd, 260K, rearended someone
RIP 1986 245 boring, 200K, rusted beyond inspectability
RIP 1981 242 turbo 5spd, 300K, serious teenage crash

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