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There wasn't a reason for the engine to be hot? Preignition sound
and overheating is a head gasket. God Bless America, ßill O|||||||O http://www.billhughes.com/ Jeff debit wrote: > > The last few months of driving my good old Cherokee with a 4.0 engine > and about 300,000 miles has been making a bit of a clicking sound when > the engine is cold. Tonight as I was driving along the clicking sound > got a lot worse, and the engine was hot. > > As this engine has a BUNCH of miles on it I'm really afraid it might be > a rod bearing letting go, but I'm hoping it might actually be a lifter. > The noise is now always there, and it seemed to be getting worse as I > drove, it is somewhere between a click and a clatter. The oil pressure > is at least good enough the idiot light stays off, and of course the > crankcase is full. Under moderate to heavy acceleration the noise goes > away, it's always there under light acceleration and when cruising or > idling. > > Is there a quick and dirty check? I seem to recall if you pull the > spark plug wires off one by one and the problem really is a bad rod > bearing it will quiet down when that cylinders wire is pulled, but if > it's a lifter pulling wires won't make any difference. > > If it is the rod bearings what kind of luck have you guys had with used > engines vs rebuilt. I have neither the money or the inclination to buy > a new Jeep and plan to keep this one for as long as I can. (Well, a new > Wrangler Unlimited with a hardtop would be really cool, but that's only > going to happen if the Prize Patrol shows up!). > > Jeff DeWitt |
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