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ECGS Black Friday Sale!!6th Annual, Beat Your Wife to the Credit Card Sale!50 in light bar /A pillar mount less than 500 at JeepHut.c

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Unread 11-27-2004, 12:18 AM   #1
nashmd454
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Question for TEXAS ZJ1 or WVD

I have searched the forum for similar problems and haven't found much luck except for the fact that you 2 seem to know your JGC's. I have a 96 with the same mods as WVD with a few more tricks up the sleeve too. I just got done taking the valve covers off and sand blasting them and powder coating them too. They came out great but now notice a ticking sound near the covers once I turn her off. I also have a problem with her shutting off at times when I get off the gas, no matter what speed. I had to make a temp fix on the hose that goes from the intake to the left side valve cover (pcv valve???) because the original broke apart trying to remove the cover for the powder coating job, could it be a vacume leak but it seems like a good fit. I have also had the tranny replaced and truly wished I had learned more about them because I am lost listening to you guys tell the forum what to do....but my problem is a clunking noise either when I accelerate or when I let off the gas. Can you guys offer me some advice.

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Unread 11-27-2004, 12:39 AM   #2
Meerkat
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Nash,
My first guess is that you still have a vacuum leak at the throttle body, intake manifold, or one of the vacuum hoses. Probably happened when you pulled the valve covers.
I bet those valve covers look really sharp. I am wanting to black powder coat my differential covers, and some other bits and pieces.
What other mods have you got in there? I've been thinking hard about a new intake manifold, but I haven't really decided what I want to end up with. Additionally, I have been thinking I really need to build my transmission and transfer case up before pumping any more horses through them.
Post up the specs and some pics, bud!
The clunking sounds suspiciously like bad U-joints.

HTH
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Unread 11-27-2004, 07:49 AM   #3
Texas ZJ1
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The clunking noise could also be (I just love diagnosing problems over the net, it is soooooo scientific) a broken motor mount.

The engine would move under the torque or release of torque and move.

Hunter
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Unread 11-27-2004, 12:07 PM   #4
Meerkat
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Quote:
Originally Posted by Texas ZJ1
The clunking noise could also be (I just love diagnosing problems over the net, it is soooooo scientific) a broken motor mount.

The engine would move under the torque or release of torque and move.

Hunter

ooooooooooo good call!

I didn't even think of motor mounts!

Hey guys, just because Nash is picking on Hunter and me doesn't mean you can't chime in! Let's hear some more ideas!
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Unread 11-27-2004, 02:12 PM   #5
LJ_Cool
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clunking

Is the clunking present when the vehicle is not moving? Ie, if everything is in neutral, and you rev it, does it clunck?

that might narrow it down to the enginemounts,

otherwise, you may want to investigate the driveline and Transfercase

Regards
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Unread 11-27-2004, 02:16 PM   #6
matt.x
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Do you have 2WD or 4WD? And if 4WD, does the problem only happen in 4WD or does it always occur?? Course, this wont narrow the problem down if you have the Quadra-Trac (full time) case (4HI - N - 4LO). However, I only have clunking in 4WD and I believe it to be u-joints in the knuckles of the front axle.

Matt
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Unread 11-27-2004, 04:26 PM   #7
greasefingers
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Typically when you place the shifter from Park to drive and hear a clunk itís the U-joints. If you hear a clunk when punching the accelerator while already cruising, then itís the CV joints. But CVs are very strong and usually do not wear out unless they have split and slung the grease everywhere. Easy to check. However if you have a CV on the front drive shaft, someone here maybe Hunter, has indicated that it is weak. Make sure that the drive shift splines have been greased with a grease gun lately. I just did mine this weekend. Usually I do this 2-3 times a year.
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Unread 11-28-2004, 01:30 AM   #8
nashmd454
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I can't thank you guys enough....I went ahead and got a new hose and pcv valve and so far so good. As for the clunking noise it is while I am driving and not at idle. I will take your inputs and look to see if it is in the drivetrain and or t-case. My other problem I have is the front seems to rattle over the littlest bump in the pavement. I have posted the problem on the forum before and the only thing I noticed was that when I take the tires off to investigate the rotors and calipers move easily. I was told this is normal but yet in all my tinkering on cars have never known this to be true. I took it in to a local tire place and they said the driver side steering hub is going bad. Oh and that a flaw on this model Jeep is that once the pads get worn enough that they vibrate/bounce around inside the caliper and the retaining clips are banging into the calipers making the noise. Back to you WVD...I will admit that I don't go off roading and used to be one of those racer car kinda guy. I moved up in class to the JGC and went back to my old ways of boosting power and so on. I don't have the K-N FIPK like you...I went with AEM and I also went with a 160 degree t-stat. I have the stage 2 jet chip and throttle body spacer. I here you guys bad mouth them but in my Jeep I have noticed the increase. My next step is the ignition upgrade from Kevinsjeepparts.com. I have been searching for chrome parts to dress up the engine bay but had no luck so now I am using the Dremel to polish each piece. I have pics but do not know how to post. Do you have an email address...I will send them to you.
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Unread 11-28-2004, 06:53 PM   #9
JoshGC4
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another vote for motor mounts
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Unread 11-29-2004, 01:28 PM   #10
Texas ZJ1
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....but my problem is a clunking noise either when I accelerate or when I let off the gas. Can you guys offer me some advice.



That statement is a perfect broken motor mount indicator.

Hunter
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94 5.9 Laredo 6.5 RE lift with 35 Maxxis Bighorns
and 33 Bridgestone Duelers
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Unread 02-10-2005, 02:05 PM   #11
acrscotland
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I was just surfing through old posts and came across this one. I think I'm suffering the engine mount issue - I experience the clunk occasionally when lifting off the gas or if I am a little too violent on starting off I get a clunk - I always assumed it was something to do with power transfer. My question is, where are the motor mounts located so I can have a look and how hard are they to replace? Do I need proper hoists etc? Thanks.
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[B]1995 ZJ Limited 5.2L[/B]
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Unread 02-10-2005, 02:32 PM   #12
greasefingers
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Quote:
Originally Posted by Texas ZJ1
....but my problem is a clunking noise either when I accelerate or when I let off the gas. Can you guys offer me some advice.
It's time to clean up the jeep. Throw out the empty beer cans that you throw over your shoulder.
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Unread 02-10-2005, 03:18 PM   #13
O Holy P
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Could it be slop in the rear gears? I have a Ford 9" with a nascar style locker in it and they are notorious for making lots of noises (this is in my Camaro btw )....and one happens to be when you let off the gas and get back on it at say highway speeds, they just clunk in and clunk out...nothing to worry about, just backlash settings. Just another possibility. Anyway, good luck w/ it.


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Unread 02-10-2005, 03:22 PM   #14
acrscotland
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Quote:
Originally Posted by greasefingers
It's time to clean up the jeep. Throw out the empty beer cans that you throw over your shoulder.
...and there was me getting worried about my transmission... It probably is just a quirk - as O_Holy_P describes is - it's when you wind up and down. It's probably not a bad idea for me to check the mounts in any case. Thanks!
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Unread 02-10-2005, 03:57 PM   #15
Meerkat
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The motor mounts are most visible from underneath. If you look up at the passenger side of the engine, you can easily see the oil filter, just forward of that is the motor mount. In line with that on the driver's side is the other motor mount. Oddly enough, they are the only things that connect the engine to the frame, so they are even easier to identify. They look like sideways cans filled with rubber and a metal shaft imbedded in the center. If you still can't fine 'em, let me know, and I'll try to further confuse the issue.

HTH
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