5M crank in a 2M?

[johnny blade]

Can i usa a 5M crank whith rods and pistons from a 2M in a 2M? or will it be out of balance?

[gianttomato]

Why? Both are 85mm stroke.

[Ashe]

as a guess, he happens to have one available/cheap?

Other than that I have no idea about the answer to this question.

[gianttomato]

Fair point. Yep it fits.

[johnny blade]

Exactly, I have a couple of 5M cranks and my 2M crank is not so good. And i have a set of new pistons for 2M.
The 5M pistons and rods are about 12-15g heavier than the 2M rods and pistons.

[gianttomato]

One thing though, I do remember that there is something different about the number 1 main bearing - I think it's wider and need to get it turned down?

It has been a while since I played with these things.

Considered trying to find a 7M crank? You need to do a little more machining to the front of the crank to take the chain drive gear (rather than the cambelt drive).

[johnny blade]

One thing though, I do remember that there is something different about the number 1 main bearing - I think it's wider and need to get it turned down?

It has been a while since I played with these things.

Considered trying to find a 7M crank? You need to do a little more machining to the front of the crank to take the chain drive gear (rather than the cambelt drive).

The no1 main bearing is only wider 84<? I have both 83,84 and 85 cranks (from 5M-E), i noticed that i bearing cap was wider on '85(even on my '84 5M-GE).

[gianttomato]

Ya, 5/6/7MGE definately have wider number 1 main bearing journal. My recall on the 5ME was a bit hazy - the only one I had seemed to have the wider journal but then others have told me it wasn't wider so I figured there had to be two types.

Personally I would do a 7M crank, 5MGE pistons and a 41013 head (with a lot of work to the exhaust ports). Maybe source an M-D manifold and fit a couple of Weber downdrafts?

[johnny blade]

Hehe, no no. I couldnt even afford a 7M crank, and i just want to build a "stock" 2M and swap the tired one in my MS55 as soon and sheep as possible.

[EldarO]

Hehe, no no. I couldnt even afford a 7M crank, and i just want to build a "stock" 2M and swap the tired one in my MS55 as soon and sheep as possible.

i gave my old 7M crank away, was in perfect condition

Eldar.O.

[gianttomato]

i gave my old 7M crank away, was in perfect condition

Johnny Blade
Location: Sweden

Probably not thick on the ground there.

[mrshin]

as soon and sheep as possible.

Should be plenty of 7M cranks in NZ.

[EldarO]

Johnny Blade
Location: Sweden

Probably not thick on the ground there.

my bad!

i just assume everyones at least in aus or nz!

Eldar.O.