Cylinder head test plate

[Deleted member 21174]

If I want to test cylinder heads in isolation do I just need a plate (1/4"? thicker) that I drill out using an old head gasket as a template? Can I use an old gasket to seal the head against the plate? Testing the head in isolation seems like a useful thing to do.

 

[flattop1]

Isolation from what ? Testing for what ?
Valve seal .
Vacum testing the port would seem simpler albeit the guide clearance .
Pressure testing you probably want 3/4 or more milled perfectly flat .
Or diesel leak check .

 

[steve baker]

Just spray windex on combustion chamber side around valves and air blow into the ports, checking for bubbles. Easy and works as good as any method, been doing it for 20 years................ works good.....if you see bubbles...fix it!
Its an old Ronnie Robertson trick to checking for valve leakage on flat heads.

Steve

 

[Deleted member 21174]

Just spray windex on combustion chamber side around valves and air blow into the ports, checking for bubbles. Easy and works as good as any method, been doing it for 20 years................ works good.....if you see bubbles...fix it!
Its an old Ronnie Robertson trick to checking for valve leakage on flat heads.

Steve

Well, dang. I do something like that already. I use a stopper with a hole in it and low pressure compressed air (credit to Dan Pellizzari and the QRC tech series he did a while ago).

 

[CarlsonMotorsports]

You can also make a simple fixture for checking seal of the valves/seats from an aluminum port cover and gasket. Install a quick disconnect for an airline, or drill a hole in it and tap threads in it the same as a spark plug so you can use your leak down tester. Makes for quick work to check for leaking valves (AND loose seats too!) We've done it this way for 30 years on the flatheads and simply duplicated the set-up for the animal/L206 heads.


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Brian Carlson
Carlson Racing Engines
Vector Cutz
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[GeoffB]

I’ve found using a plate to be a quick and easy test.

 

[Chipg56]

Always liked to check with vacuum as well as pressure, just bolt on the flow bench.

 

[oldloco]

i have a plate that u can have drilled for clone an animal

 

[harrym]

This is what I made to test. Air pressure with a gauge, windex sprayed on the valve.

 

[CarlsonMotorsports]

^ This the same as what I described in my post and what we use in the shop on almost a daily basis.
Thanks for sharing your picture, Harrym.