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When machining a head basically. Basically just shaves off the head to increase combustion or give you higher compression. This is only a partial answer.
A machine shop will check the head for straightness. If necessary the shop will mill the minimum clean-up to straighten the combustion face (the part that sits on the block) of the head. Usually they will hot tank the heads to remove carbon and grease. Then most shops will check the valve seats and regrind them as necessary. The will also check the valve quides to see if they are worn. If they are they will replace or knurl them to bring them back to specification for stem slop. They should check your valve springs for proper height and check the valves to make sure the stems aren't to worn or bent. If a person desires they will mill the heads to increase the compression ration of the engine. They will also offer services where they check valve to piston clearance on heavily milled heads. Most shops will offer dye penetrant or magnafluxing services to check for cracks in the head (especially important for aluminum heads). They will also install hardened valve seats on older cylinder heads.
What else can I help you with?
Replaced head gasket in kia sportage still not right what could the problem be?
Did you just change the head gasket or did you take the head to a machine shop to be checked? If you didn't take the head to machine shop the most likely answer is the head is warped and not allowing new gasket to seal properly. It's possible that the machine shop can redeck the head and it will be fine. Hope this is helpful!!!
How do you know if engine overheating has warped or cracked the heads or blown gasket?
You will have to remove the head, inspect the gasket for breaks, check the head for flatness, and have a machine shop test the head.You will have to remove the head, inspect the gasket for breaks, check the head for flatness, and have a machine shop test the head.
Can you fix a head?
A machine shop may be able to repair the head but my advice is to replace a cracked head.
Can you fix a cracked head?
A machine shop may be able to repair the head but my advice is to replace a cracked head.
How do you know if you have a warped head after it blew a head gasket?
The head will need to be inspected at a machine shop. They can tell you if it is warped or cracked.
How can you tell if your head gasket broke or your head is cracked?
You would remove the head(s), take the head(s) to a machine shop to be tested for cracks, the head(s) would be repaired, rebuilt or replaced depending on results. If no cracks are found by the machine shop you would reinstall head(s) with new gaskets.
What are the head torque specs for a 1996 5.7 vortec?
It's always best to get torque specs and bolt sequences from the machine shop that performed the work. Since you're discussing head torque specs, I assume the head has been removed. Since the head was removed it should have been checked and if necessary, milled flat by a machine shop (minimum requirements for a removed head). Your machine shop should be willing to give that information to you when you pick up the heads.
How do you you tell a warped head?
You cannot tell by looking. Take it to a machine shop for examination.
How do you tell if you have a cracked head.?
You'll need to take it to a machine shop and have it "magna-fluxed".
How do you repair leaky valve guides?
This is a machine shop procedure which the head has to come off to accomplish.
Can a head be fix if it warps?
A qualified machine shop can resurface the head for you, let them determine if it can be savaged. You have to replace it - depending on how badly warped it is
How can a aluminum head be checked for cracks?
Have the head magna fluxed at your local machine shop. You cannot visually check for all cracks.
