Having problems with your 1998 Volvo V70 ?

Hello! I have V70 TDi 1999. I have knocking noise some times from the engine. What it can be?

Posted / edited by AnonymousUser on : 12-04-2021

Answers :

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!
Weak oil pressure, and or wrist pin clearance.try heavier weight oil.if you use 10w-30 try 20w-50 can band aid the problem..but this may help just about all gm 1500's 2000 up to 2009 have the same problem from the show room floor
Repair Help & Product Troubleshooting for 1998 Volvo V70

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