1979 CJ7 Body Mounts - JeepForum.com
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post #1 of 16 Old 07-11-2010, 11:19 AM Thread Starter
QuickCj
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1979 CJ7 Body Mounts

I am looking to install these in a few days and it does not seem like the hole sizes match up. I have looked around the forum and found bits and pieces of info but I wanted to re-ask the question to get a sure answer.

The body mount replacements I got are from quadratec and made by energy suspension. There are a couple different diameters and they all seem to be smaller than the body mount holes on the frame.

Is this normal to have a little play? What have you'll done in the past to correct this?

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post #2 of 16 Old 07-11-2010, 02:17 PM
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are you saying they are smaller than the actual frame mounts or that the bolts are too small for the tub bolt holes? if its the frame mounts are they rusted out? if so you may have to replace them as i did. if its the bolt issue you may have a yj tub as the bolts on a yj are bigger.

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post #3 of 16 Old 07-11-2010, 03:02 PM Thread Starter
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Originally Posted by TheRyans33 View Post
are you saying they are smaller than the actual frame mounts or that the bolts are too small for the tub bolt holes? if its the frame mounts are they rusted out? if so you may have to replace them as i did. if its the bolt issue you may have a yj tub as the bolts on a yj are bigger.

What I am trying to say is that when i put the top piece of the bushing and bottom piece of the bushing on the frame mount there is a lot of play. i.e. the outer diameter of the bushing that goes into the hole is smaller than the diameter of the body mount hole on the frame.

Not sure if that cleared things up, I will post pictures tonight if that does not make more sense.
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post #4 of 16 Old 07-11-2010, 05:28 PM
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I have seen alot of body mount holes that were enlarged due to rust and being thin? Might weld a thick washer or metal plate if good surrounding metal?
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post #5 of 16 Old 07-11-2010, 05:43 PM Thread Starter
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I have seen alot of body mount holes that were enlarged due to rust and being thin? Might weld a thick washer or metal plate if good surrounding metal?
Don't get me wrong, a majority of the body mount holes are decaying and enlarged due to rust. However, with having some holes intact they measure around 1 5/16", where the outer diameter of the bushings are maybe 7/8". Again, there is a lot of play. Is this normal? Will it pose a problem?
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post #6 of 16 Old 07-11-2010, 06:01 PM
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What are the current inside diameter of your frame mount holes?

There will be some play when installed but once you torque your bolts down to spec, it will crush the rubber bushing down and allow them to bulge out against the inside diameter of the frame holes. You didn't mention if your new body mounts are OEM rubber or aftermarket poly but my guess would be poly since they are from Energy Suspension. Poly bushing won't bulge out when the bolts are tightened and will amplify unwanted vibrations through the frame and into the body tub where you will feel them while driving vs OEM type rubber bushings.


I'm not near my CJ so I can't recall the correct diameter of the frame holes but I think they are around 1.25".

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post #7 of 16 Old 07-11-2010, 06:08 PM Thread Starter
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What are the current inside diameter of your frame mount holes?

Well i measured the intact holes with a tape measure and got 1.25" but when i got a 1.25" hole saw it was to small. So I am guessing 1 5/16" is the true size.

I did get poly bushings. Should I weld over and re-drill new smaller holes?
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post #8 of 16 Old 07-11-2010, 06:47 PM
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Again, I'm not near my Jeep but maybe the OEM rubber bushings are 1.25" diameter and the holes are 1.312" (1-5/16"). That would make sense.

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post #9 of 16 Old 07-11-2010, 06:50 PM Thread Starter
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Again, I'm not near my Jeep but maybe the OEM rubber bushings are 1.25" diameter and the holes are 1.312" (1-5/16"). That would make sense.
So then the bushings I ordered are the wrong ones? I'd say they are 7/8". And there are 3 different types in the kit, it also says it is for cj7's and cj5's.
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post #10 of 16 Old 07-11-2010, 08:01 PM
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Keep in mind that the early Jeep CJ-5 and CJ-7 frames had a smaller hole on the front Toe Board mount and that was changed about 1982. It's mount #2 in the picture and I think they were 3/4 ID.

There have been a few postings on the frame mounts here so you might find better info if you search "tub mounting" or "body mounts".

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post #11 of 16 Old 07-11-2010, 08:14 PM
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Most of my body mounts were just a little smaller than the holes in the frame so there is just a little room for adjustment and basically stay centered. The two forward most tub mounts are considerably smaller than the hoes in the frame so there is a lot of room for adjustments. My body mounts are from Daystar.

Mike

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post #12 of 16 Old 07-11-2010, 08:17 PM Thread Starter
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Most of my body mounts were just a little smaller than the holes in the frame so there is just a little room for adjustment and basically stay centered. The two forward most tub mounts are considerably smaller than the hoes in the frame so there is a lot of room for adjustments. My body mounts are from Daystar.
Exactly my friend! So did you install them? I assume everything went smoothly? No body movement of any sort?

Sorry for the barrage of questions.
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post #13 of 16 Old 07-11-2010, 08:34 PM
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I have had the tub on and off a few times now with no issues. They definitely hold tight once torqued. The two forward most tub mounts have a lower bushing that fits tight enough to hold itself up to the frame while all others have a lower bushing that fits loose and just falls off without the bolt and washer installed. Does that sound like yours?

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post #14 of 16 Old 05-07-2015, 09:27 AM
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body mounts

Hi there, I'm doing the same thing and replacing the body mounts on my 73 CJ5. I saw the image of the CJ7/Scrambler body mount placement and was wondering if someone can tell me where I can find an image like that for my 73 CJ5. Thank you.
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post #15 of 16 Old 05-07-2015, 03:37 PM
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ernst you might consider starting your own thread to put all of your body mount questions in rather than bumping up an old one for each question you have.

Go to google and do an image search on "CJ5 frame". I can't recall ever seeing one with the body mount detail, but on any '75 and older it's just the one bushing piece between the frame bracket and tub at each mounting location. There's really no need for drawings like the above.
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