INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

keeping the valves up?

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Old Mar 9, 2006 | 06:15 PM
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Question keeping the valves up?

what method did you guys use when you were swapping your springs to keep your valves up? im only aware of the top dead center method...is there another way...if so, how?
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Old Mar 9, 2006 | 06:19 PM
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Compressed air. Used a compression test/leakdown test hose and hooked it up. Worked great.
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Old Mar 9, 2006 | 06:21 PM
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v8
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you can use an air compressor, get an adaptor for the spark plug hole and remember it only holds up 2 valves on that cylender intake and exhaust. keep your regulator at 80psi so it wont drop below that as it may bleed down. good luck.
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Old Mar 9, 2006 | 06:35 PM
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i rotated the engine to where two pistons are close to top dead at the same time...
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Old Mar 9, 2006 | 08:39 PM
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Originally Posted by bluecajun5.3
i rotated the engine to where two pistons are close to top dead at the same time...


Me too, mycompressor is at a buds house, I havent brought it home yet
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Old Mar 10, 2006 | 10:51 AM
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where can i get the compression test/leakdown kit from...and all i have to do is stick it in the spark plug hole, turn the compressor on and it will hold the valves up?..seems to easy..lol
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Old Mar 10, 2006 | 07:32 PM
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guys..do i just get this from a local auto parts store...the compression/leakdown test kit
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Old Mar 10, 2006 | 07:38 PM
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Originally Posted by Heym
guys..do i just get this from a local auto parts store...the compression/leakdown test kit
Yes. Most would have them I'd say. NAPA definately.
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Old Mar 10, 2006 | 08:35 PM
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thanks man
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Old Mar 10, 2006 | 08:49 PM
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Believe it or knot (haha), you can use 1/4" nylon rope if you dont have an air compressor like me. Here's how.

As the piston is just starting the compression stroke, insert the rope into the cylinder thru the plug hole. Anywhere from 4 to 8 feet of rope should do it. Leave enough rope outside to pull out later. Continue to turn the motor by hand until you feel some resistence. STOP! That's the piston stopping (compressing) on the rope. R+R the valve spring, back off the compression stroke and pull out the rope.

WHA-LA...
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