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jwhiz27 07-29-2010 02:53 PM

ticking under the hood
Have a ticking noise and I can't tell where it is coming from it goes away once temp hits 210 and stays there. But man its loud at start up. Some days it doesn't happen some days just a bit but yesterday it was really loud since it is intermitent I don't think its a rod. But what else could it be. Oh its an 02 sport with the 4.0 thanks hopefully all you smart people will reply.

flatline 07-29-2010 03:06 PM

lifter or injector. rare case piston slap.

jwhiz27 07-29-2010 03:48 PM

What's the best way to diagnose that.

jwm1986 07-29-2010 04:35 PM

Sounds like an exhaust leak to me. Be it a loose manifold bolt or possibly a small crack somewhere in the manifold.

hillbilly101 07-29-2010 04:40 PM

Have an 87 yj that used to do that ended up being the back lifter. seems it worked loose I tightened it back down and bye-bye tick.

cswusc_03X 07-29-2010 11:52 PM

my tick comes from the camshaft position sensor , but I don't think the 02 has that.

castorj29 07-29-2010 11:56 PM

My 2008 does that. When i am driving in high gear.And i give it some gas is when i hear it the most.

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