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04 xc70 engine noise

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R
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famfeld
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04 xc70 engine noise

Post by famfeld »

I was told the knocking is the drive belt tensioner. Not sure because it goes away in N or P. The squeaking is constant, but clunking aound goes away. At idle only, goes away when revving or driving

https://drive.google.com/file/d/1kxNrYy ... p=drivesdk
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jonesg
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Post by jonesg »

famfeld wrote: ↑25 Apr 2023, 16:01 I was told the knocking is the drive belt tensioner. Not sure because it goes away in N or P. The squeaking is constant, but clunking aound goes away. At idle only, goes away when revving or driving

https://drive.google.com/file/d/1kxNrYy ... p=drivesdk
Remove the belt and listen again, if you wait it will soon shred the belt.
When it shredded the belt it made a real mess on mine.
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famfeld
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Post by famfeld »

I'm going to be doing that tomorrow. Just occurred to me. I guess i panicked because i don't want any transmission or engine issues
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famfeld
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Post by famfeld »

Just checked belt and found crank pulley loose with center bolt missing. Strange how 2 trusted professional mechanics misdiagnosed this!
Thanks for the help
Feld
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BlackBart
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Post by BlackBart »

Good catch!
ex-1984 245T wagon
1994 850T5 wagon
2004 XC70 wagon BlackBetty
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jonesg
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Post by jonesg »

famfeld wrote: ↑26 Apr 2023, 10:33 Just checked belt and found crank pulley loose with center bolt missing. Strange how 2 trusted professional mechanics misdiagnosed this!
Thanks for the help
Feld
Its a center nut no ?
32mm I think, something big.
Don't run it.
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abscate
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Post by abscate »

30 mm Hex on the P80 and I think P2 is the same.
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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
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vtl
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Post by vtl »

I lost that nut not so long ago, too. My 450 ft-lbs electric impact wrench failed me.
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jonesg
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Post by jonesg »

vtl wrote: ↑27 Apr 2023, 11:35 I lost that nut not so long ago, too. My 450 ft-lbs electric impact wrench failed me.
same here, bought a new nut and applied blue loctite. 2 yrs, fine so far, I do check it occasionally.
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Blacklab467
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Post by Blacklab467 »

Perhaps this is another good reason to not remove the crankshaft bolt and pulley when changing the timing belt.
2003 XC 70 (sold)
2007 XC 70, 1970 Dodge Charger R/T.
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