Question about 2000 Volvo S80

1 Answer

Knocking noise

The engine knocks on start up and continues until turned off. Digital reader says cylinder 1 is misfiring. Been told by a few people that the lifter might be collapsed or stuck, could this be the problem, and is there a way to fix it with out having to rip it all apart to change the lifter?

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  • Jillian Tevis Sep 04, 2013

    Update... It is not the lifters they were all good looking and it was not the variable valve timing pulley either. Looking for more reasons why it would be knocking, going to try the vacuum pump next like Akitanovic suggested and yes Reynaldo the oil was the first thing I checked it is fine still clean looking and no silver bits in it.

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  • Volvo Master
  • 21,873 Answers

Yes the lifter or one of the valves could be damaged. No the valve cover and maybe the cylinder head would need to be removed to repair depending on what the actual problem is.

Posted on Jul 17, 2013

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

emissionwiz
  • 74896 Answers

SOURCE: Car is knocking

Sounds like a bad connecting rod bearing or a carbon knock, de-carbon the engine and retest for noise, if it is still there the engine will need to be torn down the crank refinished and new bearings installed.

Posted on Oct 31, 2008

  • 1 Answer

SOURCE: knocking vvt pulley?

Variable Valve Timing

Posted on Nov 10, 2009

duane_wong
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SOURCE: My Volve XC90 is making tapping or knocking noise

Sounds like the engine may have some worn bearings inside either on the crankshaft or the camshaft.

Posted on Jan 14, 2011

cansmo
  • 2431 Answers

SOURCE: my volvo v70 engine has started knocking and

Engine knock check the oil is it deeply black with metallic substance like silvery or aluminumish.Is it turbo and used all the oil. if there is no oil put some in it if there is oil then youll need to replace the engine or rebuild it

Posted on Apr 23, 2011

  • 1 Answer

SOURCE: Hello! I have V70 TDi 1999. I have knocking noise

The knocking noise of these engines is usually from vacuum pump. Just remove the 6 torx screws from vacuum pump cover with a hot engine and let the oil drain from it overnight. Be careful not to loose any part of vacuum pump - has 2 metal one way valves, one plastic valve and two rubber parts one big seal and a washer. Remember how it was installed and clean those parts with care before assembly. The hose on vacuum pump cover doesn't need to be removed - rub clean cover with cotton cloth. The tractor-like knocking sound was gone on my car!

Posted on May 31, 2012

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