'98 TJ 4.0L Manual
Have developed a rattle somewhere in the engine. Has gotten progressively more noticeable at idle and very low RPM. Just can't seem to pinpoint it over the engine noise. Any typical problems I should look for? Its not in the tranny since the noise can be heard at idle. Water pump is new. Maybe the AC compressor bearings, but AC works fine.
AC compressor is tested by listening to it with the compressor off and the compressor on. If the noise goes away with the compressor on then it's the electric clutch. If the reverse, then it's the compressor bearings.
Initial thought is a cracked exhaust manifold. Usually around the lower collector or back on cyl 5/6.
How's the cat? is the rattle coming from it?
Also check the motor mounts to make sure they haven't gone byebye and let the engine or exhaust rattle up against something.
That was my first thought... exhaust manifold.
-jenn
The rad fan clutch will/can make a rattle when it fails.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail >
I'm disappointed. I thought you would find some way to blame a bad ground strap
LOL
Chris
It can if the loose ends and banging around the valve cover...
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