Engine Mounts
 

Hey all,

Question about engine mounts, were the OEM mount brackets aluminum and the other steel? Why were some both steel?

The FD that I bought was a rolling chassis that was getting converted to an LS swap. So I’m missing most hardware.

I had a 20b built, along with a subframe. I’m looking at probably the Banzai mounts, but not 100% on getting both steel brackets or not.

The original 93's had one aluminum and 1 steel mount. The aluminum was on the driver's side, steel on passenger. I think they may have done that because of the heat of the turbos or something.

The mount was bonded to the aluminum mount, not bolted. That's the big problem - once the mount fails, you have to throw everything out. in '94 or so they went to both being steel with bolt-on mounts so you don't have to replace the whole arm too.

People have tried to make the aluminum arm work with aftermarket mounts, but it really doesn't work. The bolt going through the mount can saw into the mount over time, ovalling the hole out.

Long story short, you should use 2 steel mounts. Or, you can look into the mounts from Full Function Engineering - they are CNC'd aluminum. Gorgeous parts and work great but they are pricey.

Dale

Wow thanks for the info. That’s absolutely everything I was looking for.

Thanks for the insightful info DaleClark! I was wondering about those bipolar mounts too. Got one more question for you...both the driver side and passenger side steel mounts look identical. Can I grab one that was from the passenger side and install it on the driver side then install aftermarket motor mount on it?

Use 2 steel mount arms with your choice of polyurethane mounts. I offer these https://www.irperformance.com/produc...-motor-mounts/

Also, when and if you do buy mounts, a motor mount's harness is measured the same as skateboard wheels. The higher the number the harder the polyurethane.

You can, the steel passenger has a provision to bolt a heat sheild to it, the later steel driver's side mount doesn't have the holes for the heat shield. But you can put a passenger side mount on, it will just have extra unused holes.

Dale

Can I get brand new steel motor mount brackets from the dealer? If so, what's the part #?

I think you can but I don't know if they are available separate from the mounts. Best bet is to just buy used really. You can use a passenger mount on the driver's side too, the only difference is the driver's side doesn't have the holes to screw the heat shield on. You just remove the heat shield when using on the driver's side.

Dale