Rod barring on its way out
SOURCE: have a1997 2.5 jeep wrangler.
If a knocking sound occurs at idle, a bearing for the camshaft or the crankshaft may be bad.
SOURCE: I have a 1997 2.5 jeep wrangler.when you first
It may be piston slap. This is caused by either engine wear with the piston bores being too large for the pistons, or by poor manufacturing tolerances, or a combination of both.
To test for this, start the engine up first thing in the morning and run it for about thirty seconds while you listen carefully and memorise the sound and
intensity. Turn the engine off quickly, remove the spark plugs and put two
squirts of motor oil into each cylinder. Reinstall the plugs, start the
engine up again and listen. If you have piston slap the noise will have been greatly reduced or even
eliminated for about thirty seconds seconds and then returns.
The fix is to rebuild or replace the engine, but if it works just fine then don't worry. Many slappy engines keep going for tens of thousands more mile. The fact that your knocking is only at idle suggests your crankshaft is not to blame.
SOURCE: I have a knocking noise
I HAVE SAME JEEP SAME PROBLEM...I have found out after research that all these jeeps like yours and mine have a common problem with engine clogging and the valves sticking and the rocker arms coming off.....This is true I pulled my valve cover off and the rocker arm had come off because the valve was stuck ....Pressure between the rocker and the cam and the valve is the only thing that will keep the rockers from falling off......And when the valve starts to stick the rocker falls off.....This is sad but true.....Also it is badly clogged with black chuncks of burnt oil....I dont know what causes this other than the wrong weight oil....but I only used the wrong oil maybe 2 times...
There should be a recall on these because the rocker arms shouldnt come off.....I think the rockers are wrong from the factory....I am a level 2 chrysler tech.and also ASE certified.......It makes me angry that they built these so weak !! ....All you can do is remove the heads and have a complete valve job done and clean the oil pick-up tube in the oil pan as well....then a complete engine flush..
.....ONLY use 5w20 weight oil also........If you dont have the cash dont tear it down cause I almost guarantee you have the same problem as I.............Hope this helps.................Metalpoet
SOURCE: clicking noise , what is it , and how do i fix it?
I had this noise and found that the fan shroud was being hit by the fan. Renoved the fan shroud and the noise stopped. The shroud had broken into two pieces.
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