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Thread: Clunk When Starting

  1. #1
    I am a chapter of one sincitycj's Avatar
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    Default Clunk When Starting

    It seems that the CJ has developed a new problem. When ever I go out to start it I get a clunking sound from the right side. I'm thinking it's the starter being as the only time I hear it is when I'm starting it. Anything else I should be considering?
    Quote Originally Posted by usnavymitchells View Post
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    Time n Money Ghost00TJ's Avatar
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    Default

    did you check the starter, my buddy had a ford that the starter bolts would loosen up often.
    F'it, aint my Jeep!
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  3. #3
    I am a chapter of one sincitycj's Avatar
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    Quote Originally Posted by Ghost00TJ View Post
    did you check the starter, my buddy had a ford that the starter bolts would loosen up often.
    I'll be checking those when I get home from work. I'm hoping I can get one of the mechanics to take a look at the motor when I start it so I can rule out the mounts.
    Quote Originally Posted by usnavymitchells View Post
    went to google to see if I too was a dumb ass!!! Well actually I am.

    http://www.sincityrubs.com/

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    Senior Member jeepdreamer's Avatar
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    Two things coming first to mind are 1) Yes, the starter bolts. These are fairly notorious for loosening up. If one fell out the starter will "wrack" in the opening when the key is turned. I (unknowingly) drove about 800 miles while missing a bolt. It started klunking as I left for my Atlanta to Colorado trip one year. Only noticed it when the other bolt came out and the starter started banging around going down the highway! DUH! Lesson learned. Now I use a lock washer and a tiny drop of loktite!
    The other possible is a bad motor mount. These are failure prone as well! They will often seperate internally and look "normal" unless you know what you are looking for. Try using a long prybar to raise the pass side of the engine up at the mount area. The torque of the 4.2 can eat the pass side one faster (pulling versus the compression of the dvr side) and even a little extra movement can cause some strange things to come into contact causing a bump or bang...

  5. #5
    I am a chapter of one sincitycj's Avatar
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    I had one of our mechanics here at work take a look when I hit the key. After a few times he said the starter itself was going, probably the drive gear banging on the case from the inside. He had me put my hand on the starter when he hit the key and even when it didn't clunk loudly you could feel it through the case. Guess I'll have to spend $50 and replace it. The motor wasn't pitching either way so the mounts are looking good for now. I'll be getting those replace as soon as I save some cash, probably end up going with poly to survive the heat we get here a little longer anyway.
    Quote Originally Posted by usnavymitchells View Post
    went to google to see if I too was a dumb ass!!! Well actually I am.

    http://www.sincityrubs.com/

  6. #6
    I am a chapter of one sincitycj's Avatar
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    Well it wasn't the starter. I'm going to recheck the mounts here shortly. A few people on JF mentioned the flywheel. Is there an easy way to check the fly wheel?
    Quote Originally Posted by usnavymitchells View Post
    went to google to see if I too was a dumb ass!!! Well actually I am.

    http://www.sincityrubs.com/

  7. #7
    Senior Member jeepdreamer's Avatar
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    You may have to be a little creative to see exactally where the issue is...esp if it is the mount. They can sometime look really normal but once removed you can usually see the problem. Also, check the tranny mount while your at it. Depending on how much has been done to yours over the years some stuff may have been moved around. Something like a non-factory exhaust hanger or tubing could be close enough that a tired but not dead mtr mount could allow enough movement to cause contact. May find that putting it on the lift, pulling th coil wire and having some one turn it over while your under it proves useful...? Luck! Keep us posted!

  8. #8
    I am a chapter of one sincitycj's Avatar
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    It ended up being a combination of things. The motor mounts were weak and the extra vibratin from the motor caused a couple of the bolts on the cross member to loosen, that's where the banging noise came from. I ended up having both motor mounts and the trans mount replaced. All is good now.
    Quote Originally Posted by usnavymitchells View Post
    went to google to see if I too was a dumb ass!!! Well actually I am.

    http://www.sincityrubs.com/

  9. #9
    Senior Member jeepdreamer's Avatar
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    Yea TEAM! Now get out there and wheel it till you break 'em in! LOL! Just to give you something to do now you may just want to go through and give it all the once over. Make sure exhaust bolts and hangers are good (didn't get rattled too), check driveshatf U-joints, make sure no seals sprung a leak...yet. And how long has it been since you serviced your wheel bearings? Completely unrelated but I have been going ove a to-do list on mine and realized I am very forgetful of some stuff until a breakage occurs...:0

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