Head work and gasket thickness

[Lukem3]

I'm about to have my head sent off to have a valvejob done. Going with arp 2000s, and initially wanted to use a stock gasket. If my head needs to be resurfaced, .005" or less will i run into clearance issues or will i be okay? The next size up i could find is .010" over and id prefer not to take that much off the head

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[sapote]

Does it really need to be cut? I would try to avoid it unless it is warped. If the next size gasket is 0.010 then the head has to be cut the same to have the stock spec.

Why need rebuilt? any gasket leaking between cylinders?

[Lukem3]

Bent valves are the reason for the rebuild. Would prefer not to skim if i dont have to but want to plan for all outcomes. And yes i understand that but my question is with a small skim would there be piston to valve contact on a stock gasket. I understand compression will to up but if there's no contact i would prefer an oe gasket over aftermarket

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[sapote]

Bent valves are the reason for the rebuild. Would prefer not to skim if i dont have to but want to plan for all outcomes. And yes i understand that but my question is with a small skim would there be piston to valve contact on a stock gasket. I understand compression will to up but if there's no contact i would prefer an oe gasket over aftermarket

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For bent valves rebuild, no reason to skim the head.

[Lukem3]

That wasn't my question

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[digger]

0.005” won’t be a problem on stock engine

[F1Dryvr]

When i did my build i was told there was about .015 clearance....or the ability to take .015 off of head or block before danger ..

[sapote]

When i did my build i was told there was about .015 clearance....or the ability to take .015 off of head or block before danger ..

This safety clearance is reduced at high rpm, and the reason for bent valves at red line.

[Robert's_BMW]

I had .004" skimmed when my headgasket blew, I used ARP head studs and a stock headgasket, no issues for a few thousand miles.

[F1Dryvr]

This safety clearance is reduced at high rpm, and the reason for bent valves at red line.

This, plus have a look at a .015 feeler gauge and tell me how safe that feels. Then consider when they took .005 off the block and .003 off the head, which is considered a “cleaning” and not an actual resurface....

[digger]

When i did my build i was told there was about .015 clearance....or the ability to take .015 off of head or block before danger ..

when you install catcams 288/280 which has been done in stock engine many times at point of max inlet advance, exhaust retard (minimum clearance point) you've lost 1.2 mm (0.050") inlet valve to piston clearance and 1.0 mm (0.040") of exhaust valve clearance to the piston. So you're not going to have any problems with 0.005" or even 0.015" on a stock cam engine.

[sapote]

when you install catcams 288/280 which has been done in stock engine many times at point of max inlet advance, exhaust retard (minimum clearance point) you've lost 1.2 mm (0.050") inlet valve to piston clearance and 1.0 mm (0.040") of exhaust valve clearance to the piston. So you're not going to have any problems with 0.005" or even 0.015" on a stock cam engine.

Are these values -- 1.2mm IN and 1.0mm EX -- are the differences measured when piston at TDC?

[180SXTCY]

I've recently had my head rebuilt also with new supertech valves, guides etc... shaved 3 thou off it with no issues.

[digger]

Are these values -- 1.2mm IN and 1.0mm EX -- are the differences measured when piston at TDC?

yes, that's the approx delta between STD and 288/280 catcams at TDC

So the P to V on stock is atleast that amount probably plus another 1mm