Okay guys, someone here is putting out bad information about LT1 (95) swaps into Gen 3 Camaros. The placement of the motor mounts to the block is different than the 305 Chevy small block. We put the Camaro motor mounts on the K-member of the Camaro and the towers on the LT1 block. Guess what. The LT1 won't fit into the Camaro K-member motor mounts. So, for those of you that have done this, what motor mounts are you using? Did someone forget to tell us that the placement of the motor mounts to the K-member needs to be relocated?

Disappointed.

 

When I did my Lt1 swap, I just reused the mounts from the original 305 and didn't touch the mounts on the k-member.

 

Here is the problem:



This is the Caprice placement of the motor mounts. Notice the off set. The pass side is slightly rear compared to the driver's side mount.

Here is the Camaro K-member placement:




You can see the motor mounts are not off set.

I took measurements from the back of the LT1 engine where the bell housing bolts to the most rear bolt hole of the motor mount towers and got 14 1/4" on both sides? I'm so confused.

 

post some pics of the block

you might be trying to swap the baby lt1, which is a 4.3L v8 and that may have a different mounting setup than the standard 5.7L LT1

 

Trust me it's a 5.7 block as we just finished boring and stroking it to 383.

 

Here is your issue..... Just use the fwd mounting spot and you will be fine

http://www.jagsthatrun.com/Pages/ima...t-LT1-1736.jpg

 

Interesting mount on that engine. In my case, however, there is only one way the tower can bolt onto the block. Both Caprice's LT1 and the Camaro's 305 use the same motor mount assemblies. We went out and bought a set of OEM motor mounts and we noticed a slight difference between them and the poly inserts we tried. But we will see if it works any better. Thanks for the reply.




After some real detailed investigation, I think I found what was wrong. It appears that I was putting the motor mount tower on upside down on the pass side. I think this is the way it should go:




Not this way:

 

So, to answer the question of motor mounts, in this case, use the towers off the Caprice and the motor mounts are off the Camaro which are the same part # as the Caprice. That's my possible solution so far. I have to see if it fits exactly. Time to get out the hoist again.

 

Yeah, if you had them on upside down it would cause some confusion

 

What you call "the towers" ( I call them the clamshells ) have to be third-gen Camaro versions. GM made a lot of different clamshells that all look the same, but have many different variations in one or more dimensions. This is one good reason to just start with Moroso solids, 62510 with 62610. Then there's no chance of any difficulty, ever.

 

You sure about that,......??

This picture shows the clamshells placed in the CORRECT position; you've even got the pass clam and driver clam on the correct sides. ( many people put them on the wrong side by mistake and then have problems. )



Remove the original LT1 engine mounts - and the stud that seems to be placed in the top/forward pass side mounting hole in your block - then install the 3rd gen clamshells in the forward mounting holes ( as described by Jaysz28 ) and your done.

 

It works. We used the bracket off the Caprice on the pass side and the driver side was either the camaro or caprice bracket (same part #) on the block. Yes we used the front mounting holes where the Caprice used the (upside down) mounting holes which moved the pass side mountings rearward. Just to be clear, we're talking about the brackets that bolt to the block. To put it simply, use the Caprice pass side bracket and the Camaro (or Caprice) driver's side bracket. In our case the Camaro pass side bracket didn't work. Problem solved. Picture to follow.

 

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Just curious, what year is your LT1 throttle body? I'm trying to figure out how your "steam pipe" is attached to the TB. BTW, I like your engine bay.

 

Thanx for the compliments !

That TB is a 95Z TB that I got off E-Bay, it's was a stock TB that was rebuilt/ported to 52mm. I don't recall the seller - but gotta' assume that someone on E-bay is still porting these things.

 

Thanks for the TB answer. Which water pump are you going to use? I was going to use my 92 Vette water pump, but I'm wondering on the 95 water pump where the two nipples go. I assume they both go to the HVAC for heating. On the 92 set up, only one nipple comes out of the water pump while the other hose that goes to the HVAC comes from a "T" off the radiator hose. Hey, thanks again.

 

Here's a closer look at the TB,...... It's basically a fair weather car now so I removed the TB cooling (heating) ports with an aftermarket piece from TPIS:



I also ran a factory ThirdGen Oil Cooler which complicated the cooling a bit. Your car has an AC "diverter" valve on it and I think that what your describing..... My 84 didn't have that from the factory and I didn't add it. ( also converted to AC delete )

I used a 95Z LT1 Water Pump body along with a CSR electric water pump. The factory 4th gen oil cooler port on the water pump (on right side of 95Z pump) was capped off and I ran the cooling lines as required for my set-up. Used a Thirdgen radiator, Vett radiator hose, ect... ) Pretty sure that smaller black rubber line shown under Intake elbow is my steam line running to the 3-way upper radiator hose.



To make dealing with the cooling system easier,....... I began by obtaining a set of factory coolant lines from an MPFI V6 and then cut the end of them to size.



This allowed me to bring both coolant lines from the firewall to an east access location on the pass frame rail. I wanted metal lines in that spot to avoid melting noses ! ( I've moved the wiring since the pic ! ) From there I connected to the oil cooler & everything else as needed.

Honestly; Your final outcome will depend on what you decide to install, re-install, and customize !! Hopefully this helps !?!

 

Thank you very much for the info and ideas. I'll be using a Meziere HD electric pump with the OEM housing. I haven't figured out where to tie in the steam tubing yet. What headers are you using? Are they D ports?

 

The Headers I used are Dyno Dons' LT1 version; Part of the reason was because they were a match to the LT! heads. I had some trouble with mine hitting the cross-member on the drivers side,.... but have heard his headers are fitting better these days.