Resurfacing cylinder heads

[jabGT]

I am getting my cylinder heads resurfaced due to some slight warpage (.003 across the entire head, but I want to make sure I don't blow another head gasket) If the machine shop takes off minimum amount (under .010) will the intake manifold need to be milled and will I need to do anything with the pushrod/rocker arm clearence and how would I check this? I already have a valvetrain "tick" when warm.

Also what is the common method/equipment machine shops use to resurface heads? Is one way better than another?

Thanks

 

[351LX]

According to my book"How to rebuild your Small-block Ford" you can mill up to .020 without having to worry about milling your intake.When I had my heads done I had them mill .010 off each and haven't had any problems.As long as the pushrods go in with the lifter pre-load in the right ballpark everything should be fine.

 

[Stang8URMPRT]

If you want to ENSURE not having to mill the intake, you can have the heads angle milled... inwhich they mill it at a very slight angle, and barely take anything off the cylinder head at the intake side. This will keep the intake sitting true, and getting your warpage out at the same time. Ask your machinist about it.

 

[NosPony]

My heads were warped on mine. I just took them to work and lapped them for free. Got the perfectly flat. God I love working in a machine shop.

 

[Killer50stang]

How do you know if they are warped? Isn't this mostly on Alum. heads?

 

[jabGT]

Both head gaskets where blown in the middle two cylinders on both sides. I remeausred them with a straight edge and I can fit a .005 feeler gauge under it in the location of the leaks. I do have the heads at the machine shop right now so they can inspect them. The head gaskets blew right after I retorqued the intake manifold (supercharger off). I have heard that it is not possible to lift the heads by over torquing the lower intake manifold, but now I am beginning to wonder.