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Old 02-17-2019, 04:23 PM
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PTV clearance.

What is the best way to check PTV clearance without solid lifters?

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Old 02-17-2019, 05:07 PM
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Modeler's clay in the valve reliefs, place head on and use a couple of bolts to hold it on(if using a new gasket, just snug it up, don't torque it), set up your valvetrain for that cylinder and adjust lifter until the plunger is bottomed out so it can't move....rotate crankshaft two full revolutions. Pull head back off, use a razor blade to cut and section the clay so you can measure the valve imprint.

Don't use Play-Doh, it is too rubbery and springs back when squeezed and will give a false reading. Oil the surface of the clay the valve is going to contact, so it doesn't stick.

I've never done this next method, but some guys have disassembled a lifter, and shim it inside with small washers to hold the plunger up solid.
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Old 02-17-2019, 08:29 PM
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This ^^^^.


But I never put a gasket on because the new versus crushed measurement can vary a bit and I would prefer to know that I have that additional clearance. Take a stock Chevy steel shim gasket. Most of them out of the wrapper are .019 and crushed are normally .016. I have measured the crushed at .017, .015 and .016.
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Old 02-18-2019, 08:03 AM
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If you preload the lifter enough it'll stack and be close enough for what your doing.
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