When I start the engine it runs smooth, but.

Tiny
ANONYMOUS
  • 2006 CHEVROLET
  • 160,000 MILES

When I start the engine it runs smooth, but some times I heard noise like tappet sound in idling, but if I raise the rpm, then it become smooth running, Then sound like injection & tappets, How can I clean the lubricating system with out open an engine. Please, advice me.I changed water pump, coolant belt, new battery, belt tensioner, flushed oil system with flushing oil, and replaced new high quality oil with filter, previous owner not maintained well, Oil removed from engine was black stick, My car is Chevrolet Lumina model 2006[commodore]

Thursday, October 18th, 2012 AT 8:51 PM

1 Reply

Tiny
ASEMASTER6371
  • EXPERT
  • 25,554 POSTS

Change the oil every 5000 miles for 2 times and see if it helps. Otherwise it will have to opened up to see which lifter is sticking.

Roy

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Thursday, October 18th, 2012 AT 9:07 PM

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