fbekholden.com

Hi Guys,What is the difference between 138 red pistons and 138 grey pistons. It sounds like the bores are the same (11/8) Would they be interchangeable?. Regards Daz

No, the bores are not the same.

A 138 Grey has a 3.00" bore & a 3.125" stroke.

A 138 Red has a 3.125" bore & a 3.00" stroke.

Dr Terry

aahhh holden had more moves than a tai hooker...
back then...

Thanks for that.Daz.

It there a piston from another make & model vehicle that will fit into a grey motor?

Apparently EIP Vauxhall will do the job, but I guess that they are as hard to find as Grey motor pistons.

EK DAZ wrote:Apparently EIP Vauxhall will do the job, but I guess that they are as hard to find as Grey motor pistons.

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Try nason engines parts for pistons ...they have grey motor pistons and are very reasonably priced ....I bought a set of oversized pistons 3 and 3/16 for my grey recently ...I think about $300.00 for pistons,rings and gudgeons ..I hope this helps mate
Nason Engine Parts ...2/5 Monterey Road Dandenong VIC 3175 (03) 9797 1115....fingers

PS .......Nason is owned by HM Engine reconditioners

HitnMiss engine reconditioners is what i call them Fingers lol theres is a branch here in Adelaide not far from work so I might pop in & see what they have to say for themselves...

EK DAZ wrote:Apparently EIP Vauxhall will do the job, but I guess that they are as hard to find as Grey motor pistons.

DAZ, what the hell is a EIP vauxhall???

I think they were made from 1954 thru to 1957. The Velox was the six cylinder and the Wyvern was the four cylinder and a few were called Vagabonds ,which were the convertibles, which we never got over here, but I have seen a couple in Aussie, Daz