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Problem vith relocating motor mounts (V6 to V8 swap) - holes won't line up

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Old Jun 9, 2003 | 04:44 PM
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Car: '89 RS
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Axle/Gears: 3.42, 10-bolt
Problem vith relocating motor mounts (V6 to V8 swap) - holes won't line up

I'm swapping my 2.8 V6 to 350 V8 and I'm in trouble with relocating engine mounts. The mount and crossmember holes just won't line up. Does anybody have any pictures of your mounts relacated for v8 or do you have any suggestions for me, which holes to use?

Is that correct, that I can reuse my old motor mounts? I bought new ES pads for them.

This is scheme of crossmember holes and previous location of motor mount.

Last edited by max_est; Jun 9, 2003 at 05:19 PM.
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Old Jun 9, 2003 | 09:41 PM
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you have to use V8 motor mounts. your v6 ones wont fit
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Old Jun 9, 2003 | 09:54 PM
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From: Northwestern Pennsylvania
Car: 1985 Pontiac Trans Am
Engine: 355 with stuffs.
Transmission: 700R4
Axle/Gears: 4.10 Posi
there are 2 sets of holes drilled in to the thirdgen engine crossmember. The back set, where your V6 mounts are, is for V6 mounts. The front set (3 holes on each side) are for V8 mounts. V8 mounts are bigger, and when you buy them, you only use 3 of the 4 bolt holes that are there, they stick out of the crossmember just a little bit, so it can get confusing if you've never worked with them before. The brake line you have there on your V6 has to be moved back a little bit to make room for the V8. The holes for the brake line clamps are already there as well, you can gently bend the brake line to fit the spot in the back.
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Old Oct 7, 2005 | 02:22 AM
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Project: 85 2.8 bird's Avatar
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From: BFE, MD
Car: 13 Ram 1500/ 78 Formy
Engine: 5.7 / 7.4
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(dregs up post from the past)

through the POWER of , I found this and think the pic should be added to teh v6-v8 swap sticky.

on another note, I was able to drop the a-arms w/o disconecting the struts. I did disconnect the outer tie rods, and on the driver's side, dropped teh armfrom teh steering knuckle. On the pass side, I left the ball joint hooked up and disconnected the inner tie rod. I did place the jack underneath the control arm to support it while I removed the bushing bolts.

just some alternative ideas for getting to the bottm nuts of the chassis motor mounts.
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Old Oct 15, 2005 | 11:25 PM
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From: Chandler,Arizona
Car: 1985 Camaro RS
Engine: v-8 5.0 tbi
Transmission: 700r4
Could we possibly have to put the motor mounts for the V-6 were the V-8 ones were?? The spot where the V-6 mounts normally are is not working.
When we set the engine down, both sides need to go 2 different ways in order to line up instead of the engine needing to be tilted one direction in order for both sides to line up????
Tried jacking up training and everything else, don't know what else to do!!!!!
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Old Oct 16, 2005 | 12:41 AM
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From: Chandler,Arizona
Car: 1985 Camaro RS
Engine: v-8 5.0 tbi
Transmission: 700r4
In response to the person who said that we need to use V-8 motor mounts... Just talked to the parts store and they said that the V-8 and the V-6 are the same?!?!?!
That's is why I asked the previous question!! Someone please respond, I don't want to work on this car ALL NIGHT AGAIN!!!! HELP!!!!!
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Old Oct 16, 2005 | 12:46 AM
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From: Chandler,Arizona
Car: 1985 Camaro RS
Engine: v-8 5.0 tbi
Transmission: 700r4
Please respond to question under my name..... Sorry< I have a question that refers to this same topic.. I got carried away and desperate to find an answer and I put this under the wrong subject (my question) SORRY!! Been a long week!!
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Old Oct 16, 2005 | 12:46 AM
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From: Rapid City, SD
Car: 89 Camaro RS/SS
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Axle/Gears: 10 bolt with 3.42
I just did what you are doing now. The mounts are different. The v8 ones are way bigger and if you see them you will be able to tell so yourself. Use the forwardmost 3 holes and you will only use 3 of the four holes on the mount. As far as getting the bolts in, I put the bolts in through the bottom with a magnet and put the nuts on top and put some locktite on the threads so that they won't come off.
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Old Oct 16, 2005 | 12:52 AM
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From: Chandler,Arizona
Car: 1985 Camaro RS
Engine: v-8 5.0 tbi
Transmission: 700r4
So, we should use the holes in the front that are normally the holes for the V-8 instead of using the normal V-6 holes?? This makes sense to me but my other half isn't listening and insists that you have to use the V-6 holes, but they aren't even close to getting lined up! One side is always off!!!
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Old Oct 16, 2005 | 01:36 AM
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From: BFE, MD
Car: 13 Ram 1500/ 78 Formy
Engine: 5.7 / 7.4
Transmission: 6sp / TH350
Axle/Gears: 3.55 posi / 3.23
I just finished putting on the v8 mounts on my car. you WILL NOT use any v6 holes.

Also, make sure the v8 mounts have the holes that are spaced teh farthest apart on top. THE bottom forward most hole will line up w/nothing & the edge will hang off the k-mbr
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Old Oct 16, 2005 | 10:15 PM
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Car: 1992 RS
Engine: Vortec Headed 383 9.6:1
Transmission: TKO600
Axle/Gears: 10 Bolt Posi 3.73
This is a pic of the v8 mounts in the right location with the brake lines bent back around them. If it was originally a v6 chances are the brake lines are going right between the holes you need to be using.

As for bolting them down and taking them off, you can get to them with out dropping th A-arm. It just takes time, patience, and some swivel head sockets.
Attached Thumbnails Problem vith relocating motor mounts (V6 to V8 swap) - holes won't line up-motor_mounts.jpg  
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Old Oct 22, 2023 | 09:31 PM
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Re: Problem vith relocating motor mounts (V6 to V8 swap) - holes won't line up

I realize this thread is ancient now but I have to ask, how did you manage to bend and route the brake line like that? Is that still the same one from when it had the V6? I'm doing that same swap and am leery about bending the brake line or even using it for that matter. From what I am trying to do, it seems like if I get the mounts where I need them, the part that goes across the crossmember will be interfering with were the exhaust will run behind it. In your picture, it almost looks like your brake line has been flipped around.
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Old Oct 22, 2023 | 09:34 PM
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Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
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Re: Problem vith relocating motor mounts (V6 to V8 swap) - holes won't line up

Originally Posted by Camaro69Guy
I realize this thread is ancient now but I have to ask, how did you manage to bend and route the brake line like that? Is that still the same one from when it had the V6? I'm doing that same swap and am leery about bending the brake line or even using it for that matter. From what I am trying to do, it seems like if I get the mounts where I need them, the part that goes across the crossmember will be interfering with were the exhaust will run behind it. In your picture, it almost looks like your brake line has been flipped around.
It's not as difficult as you think, and the exhaust is nowhere near it...
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Old Oct 22, 2023 | 09:38 PM
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Re: Problem vith relocating motor mounts (V6 to V8 swap) - holes won't line up

I have been told that by a guy on YouTube as well but I've never been comfortable working with brake lines. What I tried to do today seems like it would work with just simply moving the brake line back enough until there is room for the mounts but then the part of the line that goes across the crossmember is basically in mid-air so I feel like I must be doing something wrong lol.
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Old Oct 22, 2023 | 10:20 PM
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Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
Re: Problem vith relocating motor mounts (V6 to V8 swap) - holes won't line up

Originally Posted by Camaro69Guy
I have been told that by a guy on YouTube as well but I've never been comfortable working with brake lines. What I tried to do today seems like it would work with just simply moving the brake line back enough until there is room for the mounts but then the part of the line that goes across the crossmember is basically in mid-air so I feel like I must be doing something wrong lol.
No part of the brake lines should be "in mid air". Can you post a picture?...
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Old Oct 22, 2023 | 10:23 PM
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Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
Re: Problem vith relocating motor mounts (V6 to V8 swap) - holes won't line up

Should look like this:
Attached Thumbnails Problem vith relocating motor mounts (V6 to V8 swap) - holes won't line up-20190614_152651.jpg  
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Old Oct 22, 2023 | 10:38 PM
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Re: Problem vith relocating motor mounts (V6 to V8 swap) - holes won't line up

Will take a picture tomorrow and figure out how to post it here, lol. Getting frustrated with this project honestly.
Also found out that the bolts from my V6 engine mounts are too short to use on the new Camaro V8 mounts. Short by about 1/2" so that makes it frustrating too.
The engine going into the car is from a '98 Silverado so the engine side of the mount is still from the truck.
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Old Oct 25, 2023 | 06:08 PM
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Re: Problem vith relocating motor mounts (V6 to V8 swap) - holes won't line up

Finally managing to post these pictures.
This is just unbolting the line brackets and moving the line back. No bending as of yet. Also, for some reason, the driver's engine mount seems a little crooked but the bolts aren't tight. Just set there. I might have to tweak the hole if need be.


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