Hey polo boffins!!!
 

Hope you can help, I have a 1981 mk2 polo with a1.3 hk engine in, recently took the head off as suspected head gasket had gone and it had! Well it’s off to get the head skimmed but in the mean time I found piston4 to have some damage so set about looking for a piston but have been struggling to find one. however I have bought a 1.3 aav engine and was hoping to either use that whole bottom end or remove a piston to put in my HK bottom end, now is this an option? Or am I wasting my time with the aav engine?

 

ive attached a couple photos of the suspect piston

That crown would probably clean up, but you'd  need to keep any crud out of the bore.

What about the rings or skirt of the piston?

 

Double check the part number on 7zap, but I think this fits

https://www.buycarparts.co.uk/ipsa/11877053

- comes with rings too.

 

 

You could use AAV block and swap crank pulley for HK square tooth pulley.

AAV has stronger oil pump than Hk. Do you know its history?

 

Sorry, that' ipsa piston s out of stock. I'm sure it showed as available last night.

Cheers for the reply mate, bores are all clear, cleaned the piston up and seem okay, it ran well before and had compression so it should be the same when I put the head back on I’ll be doing it this weekend so I shall report back