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My LTs might be banging a bit.. HELP

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Old Sep 10, 2006 | 11:20 AM
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Default My LTs might be banging a bit.. HELP

ok i jsut put QTP LTs in. looking under the hood on the passanger side you can see that one of the primaries is about 1/8" away from the k member. How can i keep it from touching that. i am not too sure but it might alos be touching the stering link too.. Also there is a little vibration at certain RPMs..does anyone else have this problem too?

any help would be greatly appreciated!
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Old Sep 10, 2006 | 02:00 PM
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solid motor mounts! lol..
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Old Sep 10, 2006 | 02:16 PM
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Yeah, mine bangs/vibrate but not alot. Sounds like I need poly motor mounts.
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Old Sep 10, 2006 | 03:25 PM
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Dremel the K member.
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Old Sep 10, 2006 | 04:51 PM
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yea i may need to do some more work on the k member and possible some new motor mounts. any one else have any ideas??

Bene does your LTs hit your stering link at all?
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Old Sep 10, 2006 | 05:26 PM
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I had mine bent with the same problem.
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Old Sep 10, 2006 | 05:29 PM
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If your motor mounts have some mileage on them or some wear, the motor is moving more than it should. If you have 1/8" of clearance and it still rubs, the motor mounts are shot.
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Old Sep 10, 2006 | 06:06 PM
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Originally Posted by sdbrown84
I had mine bent with the same problem.

what did you have bent?? and where?
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Old Sep 10, 2006 | 06:09 PM
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Originally Posted by Order 66
If your motor mounts have some mileage on them or some wear, the motor is moving more than it should. If you have 1/8" of clearance and it still rubs, the motor mounts are shot.


my motor mounts have 40k miles on them. i did loosen my motor mounts but i swear i tightened them up.. I think that it is hitting some where else
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Old Sep 10, 2006 | 06:11 PM
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also while drivng. at about 2400 RPMs in 4th the car vibrates bad.... what the heck is that?? and while crusing at any speed if you take your foot off the gas and let the MOTOR slow the car down by itself it vibrates. WTF???

Need more HELP!!!!
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Old Sep 10, 2006 | 06:36 PM
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Mine doesn't hit the steering knuckle but it's hitting on the firewall or the floor board. I'll do some investigating tomorrow.
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Old Sep 10, 2006 | 07:18 PM
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Mine hit the K member, get the dremel and grind it off.
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Old Sep 10, 2006 | 10:43 PM
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Originally Posted by bene
Mine doesn't hit the steering knuckle but it's hitting on the firewall or the floor board. I'll do some investigating tomorrow.

Bene, mine is not hitting the stering linkage, it is about and 1/8" away from it. Also it is 1/8 from pasasnger side k member.. i pounded the floor board in.. What i am really concerned about is the mother fvking vibration.. it is slgiht in at any RPM but very noticable at 2400 RPMs what the hell gives?????? i think i need to get it on a drive on lift with the motor running and see what is happening..

any other ideas?
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Old Sep 10, 2006 | 10:44 PM
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Originally Posted by BuBbABFP
Mine hit the K member, get the dremel and grind it off.

hey do you have a sound clip of your set up?? i am thinking of gettign the Sweet Thunders.. my magnaflows are really quiet..
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Old Sep 13, 2006 | 01:50 PM
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here are some pics of my LTs







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Old Sep 13, 2006 | 10:46 PM
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there most be something wrong with the site this never went to pg 1
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Old Sep 14, 2006 | 06:25 AM
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I'm getting some vibration too man after my header install. Mine seems to be only when I'm taking off in the lower RPM arears. I'm going to double check a few things this weekend.
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Old Sep 14, 2006 | 07:41 AM
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Mine is sitting against the fuel line cover bolts. Its waaaay too tuck in. I have to some massaging on the firewall and do some adjustments on that area. That's the only thing I can see thats hitting.
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Old Sep 14, 2006 | 09:56 AM
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wow im jealous.. i wish my headers were coated they look like ****! mine hits the k-member every now and then and i think im going to just shave it down a bit.. the real problem is the floorboard.. my headers/y-pipe rattle the **** out of my floor
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Old Sep 14, 2006 | 11:11 AM
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There are quite a few writeups on this particular subject. It could be that the headers are out of spec (they didn't bend them quite right). This happens and seems to be a common problem.

More than likely though, it's the motor mounts. If you go with LT's, you almost always need poly motor mounts.

I don't know exactly what GM did, but the material they used for the mounts SUX! The motors really bounce around and move in the engine compartment....some much more than others. There's too much travel in the motor and not enough clearance with the headers....simple (but PITA solution).
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