cut valve reliefs into stock 325i pistons??

[4evere30]

Hey everyone I have the opportunity to get some cheap machineshop work done .Has anyone cut valve reliefs into stock B25 pistons?
If it's able to be done how much would have to be taken off?
I know ide be dropping compression a bit,
I just think it might be a good idea , just incase .I change my belt at the regular service intervals ,just don't really trust that timing belt all that much.....

[nando]

you're going to have to cut them so deep you'll be able to see through them when they're done.

just replace the timing belt and tensioner with quality parts. it's not going to break for no reason. you still see people break them because they either didn't know or they're too damn lazy to replace it even when they know it needs it. the water pump is on the same replacement cycle so it doesn't even save you anything to not do it.

[Vin-barrett]

mine are cut about 1mm on the intake side

[4evere30]

So u had reliefs cuts in you pistons Vin ? Why only on the intake side? Is this on a b25?

[nando]

He cut 1mm. Thats not enough to make it non interference.

[redlightpete]

Additional intake valve clearance is needed to run bigger camshafts. That's why you'd need to cut the reliefs deeper.