machining
Moderators: daewoomofo, Moderators Group
machining
at the moment my leganza is in a few places. The auto is getting rebuilt and so is the head, due to the timing belt. (the bottom end was done in december). Anyways, the head place say they are going to machine the head. After confering with my mechanic friend, he says they are going to shave it. Is this so?? I would like it if they shaved my cylinder head so i can get some more compression, but is that what they are doing, or are they machining anything else?
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SoulReaver
- Posts: 18
- Joined: Sun Nov 28, 2004 6:30 am
machining the head just means they are making it flat... i had it done to my old falcon and to the cielo when the head gasket blew. they just take off a teeny little but to make sure that it sits nicely ontop of the headgasket. im sure if you want then to take a little more off they could probably do that for you.
i concur with SoulReaver but i have to say that shaving too much from the head can make valve/piston clerance issues so be careful with what you do.
MMamdouh
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GsiTurbo
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I agree with mmamdouh, there is only so much you can shave due to 2 problems:
1) valve clearance (rarely an issue, as the pistons do go down when they open)
2) change of timing. By lowering the head, the effective timing between the bottom and the cylinder head does change. If you want to increase the compression (by shaving quite a bit off the cylinder head), you should remember the timing will change as well. They way to rectify it, is to get some camgears, which are not widely available for the 2.0/2.2 engines.
Tom
1) valve clearance (rarely an issue, as the pistons do go down when they open)
2) change of timing. By lowering the head, the effective timing between the bottom and the cylinder head does change. If you want to increase the compression (by shaving quite a bit off the cylinder head), you should remember the timing will change as well. They way to rectify it, is to get some camgears, which are not widely available for the 2.0/2.2 engines.
Tom
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