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Unread 03-23-2013, 07:13 PM   #1
FOXXX0126
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1990 YJ Wrangler 
 
Join Date: Jun 2011
Location: Randolph, Vermont
Posts: 115
1990 4.2 tick

I've been having issues with a very elusive tick coming from my engine. it ticks sporadically at idle and consistently under load. I've pulled the water pump, checked the fins and bearings, and that wasn't the issue. i pulled the harmonic ballancer and timing cover to check that it wasn't an issue with the timing chain, it wasn't. as i was putting everything back on, i noticed the negative battery cable to the block was not tightened down all the way. could this cause a ticking sound?

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Unread 03-23-2013, 07:39 PM   #2
CB10101
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1988 YJ Wrangler 
 
Join Date: Feb 2012
Location: Canton, Michigan
Posts: 182
It could be if its arcing. If you're sure its on that side of the block and not an exhaust leak. Also check your spark plug boots. The insulation can wear out on cheap wires and jump through the boot to your head. If you check at night, in the dark, you'll see sparks.
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Unread 03-23-2013, 07:47 PM   #3
FOXXX0126
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1990 YJ Wrangler 
 
Join Date: Jun 2011
Location: Randolph, Vermont
Posts: 115
the plug wires are brand new and so are the plugs. ill tighten down the bolt to the block and see if that changes anything
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Unread 04-04-2013, 09:29 PM   #4
gsnfl
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1988 YJ Wrangler 
 
Join Date: Apr 2013
Location: Plattsburgh, NY
Posts: 21
Any luck? I'm fighting a similar demon. Drive shaft u-joints?
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Unread 04-05-2013, 03:33 AM   #5
JCashen
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1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: Fort Worth, Texas
Posts: 225
Check everything even if it doesn't seem like it has anything to do with your problem.

I had noises from the rear every time I took off or shifted. I thought well differential or u-joints. Turned out the u-bolts on the leaf springs wiggled loose, quickly tightened them up and the noise went away.
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Unread 04-05-2013, 05:16 AM   #6
roadyrob
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1987 YJ Wrangler 
 
Join Date: Apr 2007
Location: west palm beach fl
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try to pin point the noise with a piece of garden hose or mech stethyscope. I had one that about drove me crazy finding, turned out to be the power steering belt.
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Unread 04-05-2013, 11:02 PM   #7
FOXXX0126
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1990 YJ Wrangler 
 
Join Date: Jun 2011
Location: Randolph, Vermont
Posts: 115
I've narrowed it down to the transmission. I've gotten my hands on a new to me ax15 that ill be rebuilding to swap the old one out. if you've had you're clutch off recently make sure you've put it on the right direction, I've heard if its on backwards the springs will catch the bolts on the fly wheel and create such a ticking noise.
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