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Old 08-15-2014, 04:14 PM
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simplyconnected simplyconnected is offline
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Originally Posted by davidmij View Post
...I too am VERY concerned about the clearance Dave. How can I check it?...
Pull the valve springs off of a pair of valves from any good cylinder. Hold the valves up with anything (tape is good) from on top. Replace the head with the head gasket and torque it down.

Slowly hand crank it until you can feel the exhaust valve touch the piston. At the highest point, with the least amount of 'lash' or clearance, measure the valve stroke. It won't be much so measure it carefully.

Now let's check with your cam. Put your rocker shaft and pushrods back on in the cylinder you are checking. Again, with no valve springs, hand crank and feel the highest point at which your valves touch the piston. Do NOT let the valve drop down the cylinder or you will start all over. Some guys put a very light spring on the valve to check it. When you get to the closest point where it has the least lash, you can use feeler gauges between the valve and rocker arm. Do each valve separately.

None of these tests cost money but they should have been done at the time your engine was built. The problem with that is, most mechanics won't spend the time because they'd need to charge you more money. Now you know why I do my own.

BTW, check the bent valve's guide. It may be broken at the bottom. - Dave
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Old 08-15-2014, 07:22 PM
davidmij davidmij is offline
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Thx Dave, I think I can follow that. I wasn't able to work on it today. Family stuff with my dad's health, and getting a resume together this weekend. It'll probably have to wait once again until next weekend.
The builder told me that they shimmed all the valves to be at the same height, or stroke, if you will.
I just did the rubber mallet test on the passenger side, I haven't taken that head off yet. I can definitely tell the #4 and maybe even the #3 exhaust valves are hurt as well. I kind of found that out already via the hollow spark plug and air compressor test anyway.

Dave J
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