Blown head gasket question

[hotya100]

Sounds like a plan John. Like everyone says, It's easier to take more off, then replace it. I've been running copper gaskets on my twin for a couple of seasons. I don't know very much about them, I let my engine builder figure it out. I'm pretty sure that all of the puller suppliers can set you up with the gaskets. How's the other project coming along?

Larry

[JOHN SCHUTTE]

Originally Posted by hotya100

Sounds like a plan John. Like everyone says, It's easier to take more off, then replace it. I've been running copper gaskets on my twin for a couple of seasons. I don't know very much about them, I let my engine builder figure it out. I'm pretty sure that all of the puller suppliers can set you up with the gaskets. How's the other project coming along?

Larry

The project is coming along pretty good. Only thing holding me back is cold weather and lack of money.

[Matt G.]

Since the machine shop likely used a milling machine to 'flatten' your head, I'd get a sheet of glass and some 220 wet-dry and sand it flat. Milling the head is often not accurate enough. I removed one head from a tractor that had been 'flattened' with a milling machine, and it was more than 0.010" out of flat

When the head is placed on a sheet of plate glass, a 0.003" feeler gauge should not fit anywhere between the gasket surface and the glass. Any more of a gap and it isn't flat enough. Mine wind up flat to within 0.001". Due to the different expansion rates of the iron block and aluminum head, you need all the help you can get.

[JOHN SCHUTTE]

Thanks Matt for the reminder. I will check it tonight. It was cut on a machine that is designed to cut large heads, primarly diesels. The cutting head is about 1 1/2' dia.