grand cherokee

jf3218 · 06-28-2009, 09:28 AM

Hi,
Problem with my grand Cherokee 2000 with a 4 liter.

I had a problem with one spark plug, the inside drop in the engine on the high way.. I replaced all the spark plug and start the engine I’ve noticed a valve problem. I removed the head and replace 1 valve and at the same time changed all the lifter hydraulic du to other problem with them . I start the engine and run well.

But a week later the engine have started to knock or a tap.. That more noticeable when the engine is in cold condition and when the engine got warmed I can hear a little bit the knock and if i play with the throttle i hear it from the top but not sure

really hard to pinpoint

so what do you think about it?

thanks

pat mcgroin · 06-29-2009, 06:08 AM

Is it a tapping noise or a knocking noise?
My first thought would be that since you replaced the lifters that they may not be adjusted correctly.
If you have a real long screw driver or another long piece of metal you can put one end on the valve cover and put your ear to the other end. The sound will transmit through the bar so that you can hear it and you can then move the bar around to different areas to try to find the source of the noise.

06-28-2009, 09:28 AM	#1 (permalink)
jf3218 Registered User Join Date: Jun 2009 Posts: 1 OS: xp	grand cherokee Hi, Problem with my grand Cherokee 2000 with a 4 liter. I had a problem with one spark plug, the inside drop in the engine on the high way.. I replaced all the spark plug and start the engine I’ve noticed a valve problem. I removed the head and replace 1 valve and at the same time changed all the lifter hydraulic du to other problem with them . I start the engine and run well. But a week later the engine have started to knock or a tap.. That more noticeable when the engine is in cold condition and when the engine got warmed I can hear a little bit the knock and if i play with the throttle i hear it from the top but not sure really hard to pinpoint so what do you think about it? thanks Last edited by jf3218; 06-28-2009 at 09:30 AM.

06-29-2009, 06:08 AM	#2 (permalink)
pat mcgroin Registered User Join Date: May 2009 Location: Toledo Oh. Posts: 475 OS: XP Professional SP2 Vista Ultimate SP2	Re: grand cherokee Is it a tapping noise or a knocking noise? My first thought would be that since you replaced the lifters that they may not be adjusted correctly. If you have a real long screw driver or another long piece of metal you can put one end on the valve cover and put your ear to the other end. The sound will transmit through the bar so that you can hear it and you can then move the bar around to different areas to try to find the source of the noise.