Hepolite G12/31 CSR pistons 15036 what C/R?

CAB · Post by **CAB** » Wed Aug 03, 2011 8:23 pm

Hello
I have seen some new old stock Hepolite +0.060 G12/31 CSR pistons for sale. The part number is W 15036/N.OV but I can't find any references that confirm that these are correct for a G12 CSR and have a 8.5:1 compression ratio.
Can anyone help?
Thanks
CAB

Rob Harknett · Post by **Rob Harknett** » Wed Aug 03, 2011 9:12 pm

W15036 are for 1958/59 G12 CSR & are 8.5 -1 cr. Only you know if they will be OK for your engine as you did not state the year.

Don Madden · Post by **Don Madden** » Wed Aug 03, 2011 9:16 pm

The Welworthy list indicates that the W15036 pistons are for the 1958/59 650cc engine. Presumably they mean fall of 1958 as there was a special model of the 1958 engine with 650cc for export. The 1960-up pistons are very different & do not interchange with prior. So there are 1958, 1959 & 1960-up 650cc engine varients, each with different pistons, barrels, heads & manifold and all not interchangable with each other. What do you have? Cheers, Don.

CAB · Post by **CAB** » Wed Aug 03, 2011 11:02 pm

Hello
Thanks for the replies. Mine is a 1961 G12 CSR.
Regards
CAB

John Donne · Post by **John Donne** » Thu Aug 04, 2011 11:46 am

So now we all know what the famous Don Madden now looks like, after that picture was placed in this months Jampot. Nice to put a face to name.

Merlin · Post by **Merlin** » Thu Aug 04, 2011 1:00 pm

[quote]
So now we all know what the famous Don Madden now looks like, after that picture was placed in this months Jampot. Nice to put a face to name.
[/quot
Should that not read infamous

Don Madden · Post by **Don Madden** » Fri Aug 05, 2011 2:49 am

Cheers, Don.