RE: [alfa] mixing piston types

["Brian Shorey" <bshorey@xxxxxxxxx>]

> 	My GTV needs to have one piston/liner pair replaced
> after the oil ring fell apart and ruined both the liner
> (great big gouges) and the piston (part of the piston between
> the wrist pin hole and the oil ring land disappeared).  I had
> rebuilt the engine 2 years ago and replaced all the pistons
> and liners.  After calling around to various Alfa suppliers
> who only sold the piston/liners in sets of 4, I found IAP
> would sell a single set ($99).  It arrived yesterday where I
> discovered that the piston/liner was made by AE whereas my
> other 4 pistons were made by Borgo.
>
> 	Can I just go ahead and replace the Borgo with the AE
> piston or should I make sure that I have a Borgo replacement piston?

IMO, you're asking for trouble here, unless you take everything apart and
have it all balanced up.

Assuming it's all balanced, and the contour of the piston dome is the same
for all four, I don't think it would make a difference, but that's just mu
opinion, I could be wrong.

But the balance is critical.  If you're just planning on swapping in the new
piston, I don't think you'll be happy with the results, unless you get
incredibly lucky and the balance is perfect.

bs
--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided