MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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Billava
Bill Heath
Missouri
(15 posts)

Registered:
03/04/2013 09:54AM

Main British Car:
1973 MGB Roadster GM 3.4

Oil pan (sump) interference
Posted by: Billava
Date: March 06, 2016 03:00PM

Hello all!
I have finally started on my V6 project! Since I have owned it for almost 5 years, I thought maybe it was time to start working on it.

A little background:

This is a 1973 MGB roadster that, according to the guy I bought it from, previously had a 2.8L V6 and 700R4 installed. When I bought this car it was in an unfinished state, but came with a new 3.4L GM crate engine, never installed. I have chosen to use the 700R4 as I complete the build. I am using the early CCE motor mounts (Thanks Jim Watson!), and will be fabricating a transmission crossmember.

Todays Problem:

Clearance for the automatic seems to be adequate; however, with the engine lined up front to back and side to side, the engine oil pan hits the crossmember while the upper and lower motor mounts are still about 1" to 1-1/2" too far apart. In searching this site and others, I see 3.4 installs where the oil pan is comfortably behind the crossmember. Are there different oil pans, or do I maybe have something fouled up?

I thank you in advance for the flood of help I know I will receive!

Bill


Charles
Charles Long
McDonald, TN
(177 posts)

Registered:
09/15/2013 08:54AM

Main British Car:
1966 MGB V6 1994 Camaro 3.4L 60V6

authors avatar
Re: Oil pan (sump) interference
Posted by: Charles
Date: March 06, 2016 11:08PM

pictures will help. what did the 3.4 come from? what was it built to go in? is it carb. or FI?

charles


Billava
Bill Heath
Missouri
(15 posts)

Registered:
03/04/2013 09:54AM

Main British Car:
1973 MGB Roadster GM 3.4

Re: Oil pan (sump) interference
Posted by: Billava
Date: March 07, 2016 12:29PM

pictures will help. what did the 3.4 come from? what was it built to go in? is it carb. or FI?

Charles;

No pictures yet.
The 3.4 is a new GM crate engine.
Motor mounts are installed correctly, according to pictures Brian McCullough has posted in the past.
Crossmember to frame mounting pads are new black polyurethane.
I am unable to lower the engine into position because the oil pan hits the crossmember, leaving 2.5" to 3.5" or so between upper and lower motor mounts. The motor mount "cushions" are only about 1.25" to 1.5" thick.
Engine is carb.


Citron
Stephen DeGroat
Lugoff, SC
(365 posts)

Registered:
10/23/2007 09:43PM

Main British Car:
1970 MGBGT V6, 7004R, AC, matching trailer 3.1 liter

Re: Oil pan (sump) interference
Posted by: Citron
Date: March 07, 2016 09:47PM

Do you have the engine and trans level in the car. If the trans is hanging low my engine will not reach the mounts. I put a Jack under the trans and Jack it up into position.

Steve


Billava
Bill Heath
Missouri
(15 posts)

Registered:
03/04/2013 09:54AM

Main British Car:
1973 MGB Roadster GM 3.4

Re: Oil pan (sump) interference
Posted by: Billava
Date: March 08, 2016 05:08PM

Thanks Steve. The transmission is as high in the rear as the current tunnel mods allow. I'll probably have to address that.


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