bp motor mount

[johnboi85]

ok i searched and i couldn't find a direct answer to this. do i need the bp mounts to bold it up to my 93 mx-3 or do i use the bp's?

thanks

[atlantamx3]

Either ones you want to use will be fine. They both bolt up.

[Shady469]

While it is true the motor mount and tranny mounts bolt up, i hope you read about needing the top tranny bracket off the BP tranny (if thats what your using). you use the mx-3 mount that bolts to the drivers side frame rail in compination with the BP top tranny bracket thing and your good to go. Not getting one with my tranny stopped my swap for a couple days until i found one, although you could bolt the rest up in the mean time and start connecting other things. Im rambling... sorry...

[jaydog5678]

Yup, yup...all the mounts will work.

What you need are the brackets that connect the tranny to the mount on the front side (closest to the radiator) and the top bracket which is 2 pieces'. Mazda does not make the cast brackets for the top, so they must come from junk yards.

[LongJohn]

Also, make sure you use the front motor mount (passenger side) from the BP and not from your SOHC. They look the same, but the BP engine is a bit longer and the BP mount is a bit shorter to compensate.

[atlantamx3]

If you are keeping the MX-3 tranny, then ALL of your MX-3 mounts will work just fine.

If you are using the BP tranny, then you combine the top tranny mounts like Justin said, and use the rest of the MX-3 ones.


Geesh-- you guys make things way too difficult.

[LongJohn]

Originally posted by atlantamx3:
If you are keeping the MX-3 tranny, then ALL of your MX-3 mounts will work just fine.

If you are using the BP tranny, then you combine the top tranny mounts like Justin said, and use the rest of the MX-3 ones.


Geesh-- you guys make things way too difficult.

No no NO! Look at my post above. If you keep the "F" series tranny, you still have to use the front mount from the BP. What I mean by that is the cast part with the 3 bolts into the block on the passenger side. The round rubber part mounted to the chassis is alright. This front cast part probably needs changed with the "G" tranny as well, but I have no experience to prove it.

Believe me, I put on all the SOHC mounts, and then after the engine was mostly in, I discovered this problem, and I had to take off the alternator, then the cast mount piece, then put the whole thing back together -- all while the engine was hanging from the roof. Not fun.

While you are at it, make sure you use the SOHC cast bracket for the AC pump, the BP one won't work, and you might have to loosen brackets on the AC piping to get the pump in place (I had to) because the pump will be 3/4" further toward the passenger side and the tubes won't stretch.

AND while you are at it, don't forget that the alternator will need a v-belt pully instead of a ribbed pully. I bought a junkyard alternator to solve this.

<small>[ December 25, 2004, 03:37 PM: Message edited by: John Long ]</small>

[Marlon]

when i did my swap (bp with stock f tranny) i used all stock mounts and brackets

but with the bp and g tranny u need the tranny bracket under the battery tray, and the front bracket off of the g tranny
ohh and when u put there rear mont in u have to put the bolt in the other way so that it dosn't hit your shift linkage
i just shaved the bolt off cause the engine and tranny were already in

[johnboi85]

i'm going to use the bp with the f tranny. i'm confused? everyones saying something different? i would like to hear from typhoonk since he's using the f tranny. thanks

[Marlon]

when i did my swap (bp with stock f tranny) i used all stock mounts and brackets
u must use your stock clutch and flywheel too

i did the swap almost 2 years ago, and was one of the first ones to do that swap on mx-3.com

[atlantamx3]

Like I said above-- I am using the Stock MX-3 Tranny w/my BP and we used ALL the stock MX-3 mounts onthe new motor.

It came with that passenger side mount, but the threads were stripped on the mount. So, we pulled it off an used the one from my SOHC. It WILL work, I HAVE DONE IT, and it works FINE. You dont "Have" to use the BP one.

And Come one people-- Almost all of us have said the same thing about the mount under the battery tray must be changed if you use the G-series tranny--but he is not using that tranny-- so stop saying it!

Also-- save yourself the hassle of changing pulleys-- and just buy a BP Alternator.

And, Marlon, I HIGHLY doubt you were one of the first to keep your stock tranny.

[johnboi85]

thank you atlanta! finally a straight answer. thanks a lot!

[Marlon]

And, Marlon, I HIGHLY doubt you were one of the first to keep your stock tranny.

who eles on mx-3.com did the swap before me using the stock tranny
i never said i was first i said i said i was one of the first

[LongJohn]

It came with that passenger side mount, but the threads were stripped on the mount. So, we pulled it off an used the one from my SOHC. It WILL work, I HAVE DONE IT, and it works FINE. You dont "Have" to use the BP one.

Odd, but when I put my motor in with all the stock mounts from my SOHC, it did not fit. I got the passenger-side mount bolted up, but the other mounts were then missing by about 3/4" and I took off the mount and compared the SOHC one and the BP one. They are different and it makes sense that they are. The BP block is about 3/4" longer, so it makes sense that the cast piece is about 3/4" shorter. I measured them carefully when they were both off, and this was true. They look exactly the same, but you should measure them to see the difference.

I also believe what you guys are saying about using all the stock mounts. My BP came from an escort. Is it possible that the BP from a Protege has different mounting holes on the back side of the block for the passenger side mount?

Somehow we have had different experiences when doing the same thing. That is odd.

I think the best advice would be to be prepared to use whichever one is correct for your situation.