Zaphod

Hi,

as I wrote in the other thread it seems like my engine has a serious problem - supposedly a bad piston.

As it takes some time to order (and receive) all the needed parts, forged rods, forged pistons and arp head studs - what size overbore would you use.
(I think the answer will be - ask the engine rebuilder! But that makes the ordering roces even longer - because it will be end of the week until the engine is torn apart and take another two weeks until the new components have arrived - then install into the engine, install everything back into the car... bloody long time.

So - is there something like a common size (it's a 1,6l with OEM 78mm bore - so the option is 78,5mm or 79mm pistons) I don't think it does matter for the rods as they are the same for even 1,6 and 1,8 cars.

Thanks for your continuous help and advice!

Alta_Racer

iTrader: (4)

To quote Smoky

There is no substitute for cubic inches

the 79mm would be my choice, better chance the bores will clean up with the larger size as well.

hustler

iTrader: (6)

I went .5 over just in case something bad happened so I could hopefully bore again and retry.

juxt3r

iTrader: (5)

I went with the 79mm for my 1.6.

rbluemx6

iTrader: (2)

I would wait to see if your block needs an overbore. On my FE3, the previous owner had cracked a piston. When I sent the bare block to the machine shop, the cylinder walls were still 86mm. So I just had it honed and ready to drop in another set of 86mm pistons.

l_bader

1mm overbore used in my build...

UrbanSoot

iTrader: (24)

85.5 here. dont go more then 1-1.5mm to be on safer side