Anybody have any pistons for an AVY or ARC lieing around just pulled mine apart the one I bought and piston one is damaged, not bad but more than I want to rebuild in to a competition engine with. How does it stand using the AFH pistons on AVY rods? do-able?

 

 

 

I don't want to discourage you, but the overwhelming majority of members are regular guys using their cars to go to work or in holidays with their families. It's not like we're keeping high performance parts in the garage. For many of us even the maintenance of our beloved stock cars is a challenge. I think you would be more successful on a forum dedicated to rallies where people sharing your passion meet. Just my 2 cents.

I agree to a degree, these are only standard pistons. From a conversion that a lot of guys over here have done, I'm just hopping some one has some spares and they'll be willing to sell one on.

That piston is fine, i woukd use it personally, sadly these pistons can ojly be bought as a complete set of 4 i believe.

you cannt substitute it for an afh piston, the have a different compression height, and thy dont have a spray jet relief cutout in the skir

Ask on club lupo, somebody might have one.

Although, if you are being super picky, bin them all, theyve all had a touch, obvious timing belt failure/miss time in that engines past.

All of them have been touched? I assume that the valve cut outs are a little big for the inlets then are they, is that how you can tell? I've never seen inside the vw motor before so assumed that was standard lol. Would you honestly reuse them? I was going have an ask on club polo as well, will try club lupo as well, thanks again dude.

No, the impact witness marks are on he exhaust side, and yes i would use them again.

i would only reject one if the upper part above the top ring land is scored or damaged.

OOOOOH yeah so there is, I hadn't even noticed that! but yeah I see.

For the head of the pistons to look like that, they had been exposed to great mechanical and thermal shocks. A visual inspection by naked eye is not enough. A NDT is necessary. The pistons are weakened, cracks will develop fast and it is only a matter of time till they will break the pistons. Yeah, maybe you could use the pistons in a stock car driven by an old woman, but in a rally car it is a disaster waiting to happen.

well that's it, found a set of pistons, bought on there way, what's the point in messing about if I'm going to spend £500 on rebuilding it what's the point in having a piston break up and smash the head to pieces!?!