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General Forums => The Mess Hall => Topic started by: Android20 on March 11, 2008, 11:38:35 PM

Title: 94 YJ 10000Kms on rebuilt engine and valve train tapping noise ????HELP
Post by: Android20 on March 11, 2008, 11:38:35 PM

I would like some advice on what the tapping sound could be and how to fix it. It's only noticeable when idling and started about a couple days ago I put some engine oil treatment specifically designed to get rid of valve noise but that did not work. Thanks for your help

Title: Re: 94 YJ 10000Kms on rebuilt engine and valve train tapping noise ????HELP
Post by: Jeffy on March 12, 2008, 01:07:45 PM

Is this your first Jeep?  2.5L's as well as 4.0L and 4.2L's have noisy valves.  It should die down a bit once the oil pressure is up.  Although an exhaust leak could be a possibility as well.  The rear most exhaust manifold stud tends to break off causing a leak.

If you know how to check the valves then it wouldn't be that big of a deal to do with only 16 valves to check.  Although it should have been checked when it was rebuilt.  6000 miles is nothing.

Title: Re: 94 YJ 10000Kms on rebuilt engine and valve train tapping noise ????HELP
Post by: jcsanders79 on March 12, 2008, 03:20:14 PM

My TJ had a tapping at 114000 that started out like that and it ended up throwing a rod.  Don't just write it off as noisy valves.  These guys are quick to say Jeeps are noisy but if you notice something differernt get someone to look at it.

Title: Re: 94 YJ 10000Kms on rebuilt engine and valve train tapping noise ????HELP
Post by: Android20 on March 13, 2008, 01:46:36 PM

thanks a lot for your advice