21 replies to this topic

[MrBounce]

Agree 100% with Cooperman. I am no expert, but the bores on my 1275 Metro lump looked fine, and I thought I could get away with a hone & some new standard-sized pistons. Took it to a reputed race engine builder and he said there was no way he'd put new pistons in old bores for that very same reason as documented above. As said, tis a false economy.

[samt88]

Okay cheers I'm just trying to take all the different advice I'm receiving from everywhere and make some sense of all of it!

[ACDodd]

Too many people on here seem to miss the point. Utterly useless to tell someone what they need without first having the components inspected and measured up. This inspection directs you on to what needs doing next. You can't even tell the OP what size pistons he needs for a rebore as you don't know how much wear there is. You can't tell of the original pistons are still serviceable because you don't know the ring groove side clearance or skirt and crown condition or dimensions.
There is nothing wrong with old bores and pistons if they measure up!

My advice to the original post is have your bores and pistons measured up/inspected then decide where and how much money is spent.



Ac

Edited by ACDodd, 03 August 2013 - 08:23 AM.

[ACDodd]

by the way always happy to do free inspection and measure up of TMF members engine components.

Ac

[Vipernoir]

Instant rebore ranks up there with must regrind the crank.
If the accurately obtained numbers are correct, why waste money on either ??

[Gr4h4m]

I guess isn't comes down to odds... I would guess more need machining than not with these old engines....let's face it the newest ones are old now.....

[samt88]

ACDodd that'd be really helpful cheers! Wherabouts are you based?