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ticking noise?

J

Jeepster4wd

NAXJA Forum User
Location
socal
im trying to figure out what the hell this ticking noise is i keep hearing? its comming from the motor and clicks faster depending on how much throttle i give it ??? any ideas? nothing is rubbing or anything so it isnt that.

its comming from the bottom of the motor so i dont think its valves any ideas?

this is on a 93 4.0 XJ

:repair: ??


Someone off another jeep forum mentioned mabey a piston skirt? any ideas ?

thanks.
 
If it's a 4.0 it's probably good ole piston slap. It happens when the piston skirt slightly touches the cylinder wall. My '94 does it,as well as the wife's 2000 model. It's a very common thing on 4 liter's,and nothing to be concerned with. That is,unless it's a REALLY loud knock,then you got some problems:D
 
I would have to agree...my 89 and my 96 do the same darn thing!
 
my jeep has never ticked before and its pretty loud ticking noise you can really hear it pretty loud when you are under the jeep. i dont think it sounds normal. :confused: any ideas?
 
Is the noise coming from the front or the back of the engine? Auto or manual transmission? How many miles on the engine, and how many of the vehicle?

If the noise is from the front, it could be a timing chain slapping the front cover. If it's coming from the rear, it could be loose bolts holding the torque converter to the flex plate, or it could be a cracked flex plate.
 
its a automatic with 136k miles on engine and vehical. and its a 1993 4.0HO with police package. the wierd thing is it sometimes it doesnt tick. but when it does tick you can really hear it.and it goes faster as the rpms increase. il try and get a sound clip of it today.
 
depending on how the ticking sounds,..... I'd say don't rule out the belt and pulleys (or rather bearing on the pulleys).... If it's loose (belt) it can give you a bit of a ticking (I had some sort of a tick that went away after I retightened the belt to spec)

Kejtar
 
What about the exhaust manifold gasket??? mine ticks when on the gas gets faster.....well this was before the bearing issue
 
Exhaust manifold leak
 
well il let you know what happens im planning on having some jeep specialist dude look at it and see whats up. cause i cant really pinpoint anything.
 
Hey, I just had that same problem I think you are describing. I spent 3 hours trying to find it. Had to take it in and they found a faulty starter was the cause. I had replaced it about a month ago and it seems that the spring that pulls the shaft that engages the flywheel had broke and was loose in the starter. It would hit the flywheel. Luckily it was under warranty but the parts supplier wouldn't pay the diagnostic fee. Good Luck.
 
what makes a police package a police package?

any performance upgrades/additions?

when my tranny computer (ECU) went bad last fall i had the chance to get the police package ECU but the jeep parts guy didnt know if it would be compatable with a regular 4.0 etc etc, so i got the regular one

CaptTrev
 
yea its supost to have a beter ecu that ugrades shift points and stuff. it feels very quick. iv also got a highflow cat 40 series muffler and a K&N intake i made. the police package also has a column shift which is unique for jeeps. I have a big hole were the shifter would of went. im planning on just putting my light switches thier. it also has a high extended idle buttom which raises the idle speed when you are going to idle for a long time.
 
Probably an exhaust leak, especially if you have a tubular manifold. Mine cracked at the lower 2 into 1 junction at the edge of a weld. I took it off and rewelded it, seems to be holding up fine, but I have plans to replace with a header made of thicker guage tubing. Apparently cracking is common on the tubular exhaust manifold. But then again, your engine may be about to grenade, so take this for what it is worth, just another step in the process of elimination.
 
not to get too far off topic but you said i has the "police package" whats all that involve. once again no to steal the thread.:eek:
 
I have an occasional lifter clatter or tick on my 89, usually after startup. Guessing that I have a lifter that leaks down when sitting for a while. I recently developed an exhuast leak that ticks as well, 2nd one for me so the welded up stock manifold fix lasted almost 3 years.......header time.
Good luck........if nothing else helps, try sprinkling some Hartz Tick and Flea killer under the hood...........:D
 
well i took it in should know shortly whats up with it.


il try and get some pictures up off it.

im planning on a clayton longarm setup mabey coil overs or just coils and triple bypasses :)
 
well it looks like my motor is done. looks like its alot more serious than i thought. im going to need a rebuild or a new motor...
:smsoap:
 
damn... that sucks. Good luck to ya. I thought for sure it was a pully or exhaust leak. Was it one of the main bearings??
 
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