2001 Pontiac Sunfire engine noise. The noise can be described as a ticking noise that accelerates with additional throttle. Engine cylinder head was replaced right before the noise began. I have already replaced the oil with little luck. The noise seems to start when the engine warms up and quiets down at high speeds. Any suggestions.

10

Asked by Sep 06, 2012 at 12:55 PM about the 2001 Pontiac Sunfire SE

Question type: Maintenance & Repair

140,000 miles. New Remanufactured Cylinder Head Installed. Replaced all Gaskets and Bolts. Recent Oil Change after Head Install.

One Mechanic said it could be valve slap and may go away over time. I do not trust his answer.

10 Answers

2,985

thats an overhead cam engine, so a leaking valve follower, or excessive clearance in one of the valves, pull one spark at a time to attempt what cylinder the noise is coming from

1 of 1 people found this helpful.
10

It is not an overhead cam engine. It is the 2.2 liter engine.

1 of 1 people found this helpful.
18,765

sounds like a lifter is stuck or sticking. Woulda been easy to do with the head out...

1 of 1 people found this helpful.
10

If I take the valve cover off, will I be able to see the sticking lifter? Or will I need to replace them all?

7,395

mine went away.. it took 50k miles though.

175

Sounds like either a stuck lifter, rocker or pushrod. I'd have someone try and re-adjust the rockers.

18,765

If you tale the valve cover off you may be able to see if a rocker doesnt move with the engine running. However this will sling oil everywhere. But lifters can fail but still move the rocker. Pushrods dont tend to stick. They can bend. Both should have been replaced when the head work was done.

675

low oil pressure will cause this problem.. sounds like the oil may also be thinning out too much when warm.. what oil did you put in it? 10 w30? synthetic?

2 of 2 people found this helpful.
10

I am havin the same problem mine has 141,354 miles on it and it starts ticking as soon as i crank it.

1 of 1 people found this helpful.
10

I'm sorry it doesn't tick until it warms up.

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