Thread: Motor mounts not lining up

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You might want to try a set from the local chevy dealer.

Originally Posted by Itoldyouso

Man, this is becoming a case for CSI.

Ok, let's get it down to basics. It looks to me like your mounts do not go on the angled portion of the frame like I envisioned, but rather, they go straight up and down on a vertical portion of the frame. Is that correct?

If so, if you put weight on the engine mounts by taking some support out of the engine lift won't the frame portion of the mounts slide down that wall and line up with the holes?

Everytime you install a motor there is some fudging with a picklebar to get the holes to line up, and it looks to me from the pictures you took that those mounts are able to slide down that vertical wall the extra distance you need. Or am I missing something?

Don

No, scrap all of the above. The one picture you posted was throwing me off, I see they do go on an angled portion of the frame, in the other pictures. Hell, just redrill the holes a little higher on each side and be done with it. It's nothing us hot rodders haven't been doing for a million years and a 1/4 inch per side is nothing.

They definitely go on the angled portion of the frame. I have pictures of the old mounts still installed after I pulled the old motor, and they are in the exact same spot.
Honestly, I really thought about redrilling the holes. The reason I haven't done it yet.... First, there is a reason it's not lining up, I didn't want to rig it up. A 350 came out, a 350 should go right back in! Something's wrong, and i'd rather find the issue, if possible. Secondly, if I move my bolts up, that means the engine will sit a bit higher, and I'm not sure if I will have to worry about problems with the transmission and transfer case lining up properly.

Originally Posted by rspears

How about if you slot your MM holes where they bolt to the block toward the top about 1/8" to 1/4", shifting your MM's down on the block a smidgen, which will put them just a bit closer together, dropping them down deeper between the frame rails. I cannot see that a minor slotting will affect your mount in any way as long as it's equal on both sides.

I could also do that. I want to find the problem, first, though. There HAS TO be a reason this isn't lining up. It's almost the same engine going in as what came out. Only difference is they are about 10 years apart.
Let me measure some other trucks, and try to get a hold of the guy who has my original motor mounts. I think I got his number... I'll let you know in a little bit.
Thanks!

Ok im pretty sure it's in the block- side mounts. I can slide my hand between the motor mount and the frame mount on my current one, but couldn't on any other truck I seen. looks like if I get a shorter engine side mount I'll be fine. Unfortunately the guy I sold my block to sent my old mounts to the scrapper.
I'll let you guys know when I get new mounts if thats the problem.
Thanks again for all the help.

What I was wondering on the through bolts was with the old engine - when you pulled that engine did your through bolts come out easy once you had the load off of them, or were they binding which might signify something being bent? Not likely, but we're grasping at straws here.

As far as I can remember, they came out very easy. The old mounts were not bent, either, I think I would have noticed. I looked them over fairly well.

How far south are you from Detroit??? this could be an interesting road trip

I think that nut is there so you put the bolt in from the rear . The fuel pump would be in the way,going from the front.

Very good, glad you got it figured out. Bet you know more about Chevy mounts than you ever wanted to know.


Don

Originally Posted by cffisher

I think that nut is there so you put the bolt in from the rear . The fuel pump would be in the way,going from the front.

Yes, absolutely correct... which is what I did.

Originally Posted by Itoldyouso

Very good, glad you got it figured out. Bet you know more about Chevy mounts than you ever wanted to know.

That's for sure!!!

Just when you think you've seen it all .....

Ran into this delima on a 350 install from a 2wd 1990 suburban into a 4wd 91 Suburban. Big thanks to Clubhotrod forum making the solution public.

where did you find those brackets? do you have a part number for them?

Originally Posted by texas81malibu

where did you find those brackets? do you have a part number for them?

The thread you've posted to was last active in October 2011, and unfortunately the original poster who "solved" the problem was last active two weeks later, November 1, 2011. Back in Post #5 there was a clue with some numbers that might help you....but looking at them on NAPA's site they appear to be the frame portion, not the block so may be no help.

Originally Posted by HWORRELL

Napa lists different number mounts between the two year and engines
They show part # 6021179 for the 86 350 and part number #6021581 for the 89.
The pictures of the two different mounts are very close in appearence.