Valve Clearance Issue?

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Jan 29, 2018 | 06:10 PM

MonochromeSS

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Valve Clearance Issue?

Wondering if should I even bother checking valve clearance. Milled my 317 heads ~.030. Originally they were ~76cc now they're ~70cc.

I have -26cc dished pistons with valve relief.
Heads have 2.10" intake valves.
Cam is pretty mild .581 lift, 224intake, 220 exhaust, 116lsa.
.051" MLS gasket.

I'm thinking I don't need to worry about it. I was already running this setup before the .030" mill.

Thoughts?

Jan 29, 2018 | 06:36 PM

NEstyle

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It doesn't take much longer to check than it did to start this thread. Just do it.

Jan 30, 2018 | 03:31 AM

HappySalesman

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Check it. It will save you from starting a thread later on saying "My motor is trashed"

Jan 30, 2018 | 08:45 AM

KCS

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I would check it, but I'm 90% sure that you have miles between the pistons and valves.

Feb 17, 2018 | 05:52 PM

MonochromeSS

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Just following up on this for anyone who finds this post years from now. Checked it. Tons of clearance. Even at TDC I have ~.400 of clearance when both valves are closed.

Feb 17, 2018 | 05:59 PM

Karlw

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Quote:

Originally Posted by MonochromeSS

Just following up on this for anyone who finds this post years from now. Checked it. Tons of clearance. Even at TDC I have ~.400 of clearance when both valves are closed.

You mean open, right?

Feb 17, 2018 | 06:54 PM

NEstyle

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Quote:

Originally Posted by MonochromeSS

Just following up on this for anyone who finds this post years from now. Checked it. Tons of clearance. Even at TDC I have ~.400 of clearance when both valves are closed.

Piston to valve clearance is tightest around 9 degrees before and after TDC. Checking at TDC is of no use and doesn't tell you anything.

Last edited by NEstyle; Feb 17, 2018 at 07:07 PM.