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74 Doner B for my 80 B Question

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74 Doner B for my 80 B Question #1
mlennan Mark Lennan Ft. Collins, CO, USA Sign in to contact 1979 MG MGB "Bumble-B"	Topic Creator (OP) Oct 19, 2014 06:18 PM Joined 20 years ago 376 Posts

While waiting for my V6 rebuild (thrown rod...) I bought a 74 MGB doner car. New rebuild on the original 4 banger (Parting out the body stuff.) and I noticed that the front engine mounts are quite different. Can I just buy the 75-80 Bracket and Rubber Mounts and drop the engine in? Or is there more to it than that?
The way this project has gone, I'm assuming there's more.....

Thanks.

ML

mark l.
79B

- Impossible things usually don't happen -

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Re: 74 Doner B for my 80 B Question #2
mgbanthony Anthony Henderson Eastern Thousand Islands, ON, Canada Sign in to contact 1962 MG MGB 1974 MG MGB	Oct 19, 2014 06:21 PM Top Contributor Joined 18 years ago 13,238 Posts

You will need to use the front engine plate from a rubber bumper car. Changing it involves removing the front pulleys, the timing chain cover, timing chain and gears, switching plates and reassembling. Not a big deal to do.

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Re: 74 Doner B for my 80 B Question #3
danc Dan Cramp Menifee, Ca., USA Sign in to contact 1967 MG MGB GT 1971 MG MGB	Oct 19, 2014 06:24 PM Top Contributor Joined 19 years ago 4,254 Posts

No, You have to use a 75- 80 front plate. The brackets for the late mounts won't mount to your 74 plate.

I guess I type too slow .Anthony x2

1971 MGB

Edited 1 time(s). Last edit at 2014-10-19 06:25 PM by danc.

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Re: 74 Doner B for my 80 B Question #4
mlennan Mark Lennan Ft. Collins, CO, USA Sign in to contact 1979 MG MGB "Bumble-B"	Topic Creator (OP) Oct 19, 2014 06:31 PM Joined 20 years ago 376 Posts

Thanks guys... Like I said "...More to it..." Damn!

Anyone have an extra RB Front plate?

winking smiley

mark l.
79B

- Impossible things usually don't happen -

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Re: 74 Doner B for my 80 B Question #5
dickmoritz Dick Moritz Philly 'burbs, PA, USA Sign in to contact	Oct 19, 2014 06:38 PM Top Contributor Joined 14 years ago 26,263 Posts

When fitting an earlier engine into a later car, you may find interference between the raised oil gallery boss and the left front motor mount. You can grind away some of the metal for clearance. Before and after photos attached...

Dick

Errabundi Saepe, Semper Certi
(Often wrong, but always certain)

mgb grind off early block to fit RB cars -- Before.jpg 13.1 KB

MGB grind off early 18V block to fit RBcars.jpg 33.2 KB

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