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engine number help needed

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d35 daren wood
herts, UK   GBR
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Hi can any body tell me if any of these engine numbers are 5 bearing engines ive been offered one but need to find this out they are 18gg-we-h2738 18v 847 ho28038 18gb-ru-h80634 its for a mgb gt thanks alot daren

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dickmoritz Platinum Member Dick Moritz
Philly 'burbs, PA, USA   USA
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Daren,

They are all 5-main engines. Main concern is the year of your GT and, specifically, the diameter of the first motion (input) shaft of the transmission. The 18GB may have a smaller hole in the back of the crankshaft for the spigot (pilot) bushing. If it does, and your car is a later car with a larger diameter first motion shaft, then there is a fitment problem. On the other hand, the other engines will have a larger recess for the spigot bushing. So if your car has a larger first motion shaft, then these two later engines will fit no problem. And if your engine has a smaller first motion shaft, you can fit an adapter bushing into the back of the crankshaft of the two later engines that will space the bore down to the smaller diameter. So either way, either of the two later engines are safe choices.

The only other consideration is whether any of the engines, or your GT, are rubber-bumper cars like we have here in the states. If so, then please note that the front engine mounting plate, which lives behind the timing chain assembly, is different for RB cars than for chrome-bumper cars, and so the front engine plate might have to be changed. Otherwise a direct swap...

Dick



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

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d35 daren wood
herts, UK   GBR
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Hi dick my mgb is a 1973 it has the right gear box for that year in it it was just the engine a friend of mine has the 3 of them but i needed to check which one was 5 bearing plus as you say if it will fit

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balloonfoot Platinum Member Lloyd Faust
Novato, CA, USA   USA
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Dick....only the thee main MGB has the small input shaft...5 mains are all the same size.....65-80



Law of Logical Argument - Anything is possible if you don't know what you are talking about.

"Anyone with an intense emotional interest in a subject loses the ability to observe it objectively: You selectively perceive events. You ignore data and facts that disagree with your main philosophy. Even your memory works to fool you, as you selectively retain what you believe in, and subtly mask any memories that might conflict."

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dickmoritz Platinum Member Dick Moritz
Philly 'burbs, PA, USA   USA
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Lloyd,

It was my understanding that, for the first year or two of 5-main, the first motion shaft was of the smaller diameter. Not true? Am I confusing this with the bore in the back of the crankshaft? Or am I just a crank? confused smiley

Dick

In reply to # 3192446 by balloonfoot Dick....only the thee main MGB has the small input shaft...5 mains are all the same size.....65-80



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

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ohlord Platinum Member Rob C
A tiny Island off the coast of Washington State, N.W., USA   USA
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1957 Land Rover Series I "EYEYIYI"
1957 Land Rover Series I "OVRLND"
1971 MG MGB
1971 MG MGB "Bedouin 2"    & more
Any 5-main was a 1965 or later and had the larger first motion shaft spigot end that fit the 5-main



LNDRVR4X4.COM
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1957 Series 1 Land Rover electric VEHICLE CONVERSION

FIXITUPCHAP.COM
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RD3 Radar/ Electronic Warfare Technician
VIETNAM 1969-1972

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ohlord Avatar
ohlord Platinum Member Rob C
A tiny Island off the coast of Washington State, N.W., USA   USA
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1957 Land Rover Series I "EYEYIYI"
1957 Land Rover Series I "OVRLND"
1971 MG MGB
1971 MG MGB "Bedouin 2"    & more
Bush



LNDRVR4X4.COM
Home of Project "INCARN8'


1957 Series 1 Land Rover electric VEHICLE CONVERSION

FIXITUPCHAP.COM
FIXITUPCHAP INCORPORATED

RD3 Radar/ Electronic Warfare Technician
VIETNAM 1969-1972

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balloonfoot Platinum Member Lloyd Faust
Novato, CA, USA   USA
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Dick...senior moment?



Law of Logical Argument - Anything is possible if you don't know what you are talking about.

"Anyone with an intense emotional interest in a subject loses the ability to observe it objectively: You selectively perceive events. You ignore data and facts that disagree with your main philosophy. Even your memory works to fool you, as you selectively retain what you believe in, and subtly mask any memories that might conflict."

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dickmoritz Platinum Member Dick Moritz
Philly 'burbs, PA, USA   USA
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In reply to # 3192467 by balloonfoot Dick...senior moment?

Just one of many... Errabundi saepe y'know... cool smiley

Dick



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

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