Head gasket

Head bolts are often stretch bolts that are once only use. Not on all engines though. I would always use new ones but they aren't always cheap.

Payen gaskets are good quality and I always try to get them. Make sure both head and block are clean and score free and get the head skimmed no matter what.

This should make it a once only job then.

I've read that washing powder in the coolant for a short while will get the oil out of the coolant channels. Car mechanics magazine did it with good results on their octavia project car when the oil cooler split and allowed the oil and coolant to mix. Don't run it for too long with it in though. Sounds like a heath Robinson thing to do but works apparently.

Kirkynut