Noise in new 4.7 engine
Thread Starter
Joined: Aug 2004
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Noise in new 4.7 engine
Hi everyone. New to this forum. I do have an issue that the dealership just can't put a hand on and hoping someone here might have something to input on this. I have a 2002 with a 4.7 in it, which I hear is practically bullet proof and has had no issues since its arrival in 99. Every morning and afternoon when I start it up I get a knocking from within the bottom side of the engine that lasts anywhere from 15-45secs and then goes away. Anyone out there have any input on this. I have had it in the dealership about 4times and they do not understand where it is or what it is. Have been told wrist pin but they won't be rock solid on that. Looking for any input. Thanks, Jim Vannatta
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Joined: Aug 2004
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RE: Noise in new 4.7 engine
I drive a 4.7 Dakota, and also happen to be a Jeep technician. 4.7 engines have proven to be quite reliable (I've only been inside about 15 of them since Jeep got them in the 99 WJ).
Mine doesn't make any odd startup noises. It sounds from the description that this only occurs after it sits for a few hours. If so, I'd think about trying a different brand oil filter. I use a K+N, and most of the vehicles I work on have Mopar filters on them. Over on JeepForum, there have been multiple threads about startup noises, many involving Fram filters. I wont start an oil filter debate, but many say that that was their problem. Changing to a different brand got rid of the noise. Suspected issue was a anti-drainback valve that was poorly designed.
Of course, you could have a problem that is much uglier, but the filter is worth a shot.
Mine doesn't make any odd startup noises. It sounds from the description that this only occurs after it sits for a few hours. If so, I'd think about trying a different brand oil filter. I use a K+N, and most of the vehicles I work on have Mopar filters on them. Over on JeepForum, there have been multiple threads about startup noises, many involving Fram filters. I wont start an oil filter debate, but many say that that was their problem. Changing to a different brand got rid of the noise. Suspected issue was a anti-drainback valve that was poorly designed.
Of course, you could have a problem that is much uglier, but the filter is worth a shot.
Professional
Joined: Aug 2004
Posts: 209
Likes: 5
From: Laquey, MO
RE: Noise in new 4.7 engine
I'll second the anti-drainback valve issue. I had similar problems with a 97 Neon but I'm not sure which brand I wound up eliminating, but switching to a different brand (no matter which one) is worth a try. Find a good auto parts store that's willing to look it up in the reference book to find one with a drainback valve.
Good Luck
D. Pershing
Good Luck
D. Pershing
