Join Date: Jul 2002
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Re: Name that engine noise...Please help!
Well I thought I was on the right track there with exhaust leak at the manifold. Went thru the trouble of pulling the intake and exhaust manifold to put in a gasket. For the archives, I got a Fel-Pro MS90949 manifold gasket set ($22) that comes with the 2 manifold gaskets (exhaust and intake) and a rubber o-ring like gasket and roundish paper gasket. I have no idea what the o-ring and round gasket were for so I didn't use them. Anyway, all in all the job wasn't too bad notwithstanding the 2 broken manifold bolts. One came out easy with the screw extractor, on the other I broke my screw extractor in the broken bolt [img]images/graemlins/cussing.gif[/img]. (Also, for what it's worth, there is no exhaust manifold gasket there from the factory...just metal to metal. There was an intake gasket there though.) Put it all back together minus the one exhaust manifold bolt, and guess what? The sound...chit, chit, chit... is still there. Oh well. Chaulk it up as a "been there, done that" experience. My Jeep buddy laughed at me and said "I told you so". "That noise is just the sound of a high mileage 258." I don't know, maybe he's right. But I'm not giving in just yet. When I get some time again, I'm probably gonna pop the valve cover and check the upper valve train for a broken spring or some valve abnormality. I'll also investigate the other leads by checking my plugs and timing again.