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No Compression Cylinder 1? What Can Cause This?

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Old 01-18-2005, 02:31 PM
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Default No Compression Cylinder 1? What Can Cause This?

No Compression Cylinder 1? What Can Cause This?
Old 01-18-2005, 03:13 PM
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Valve can be stuck open.
Old 01-18-2005, 03:58 PM
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True, or could be bent- have torn apart a few heads were they barely kissed the piston and bent it.
Old 01-18-2005, 04:30 PM
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Ring or valve
Old 01-18-2005, 05:00 PM
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A weak spring caused a piston to hit the valve in my motor, bending it and causing loss of compression. So start with the valve, hopefully its not a ring.
Old 01-18-2005, 07:10 PM
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All of the above. Add cracked ring land.
Old 01-18-2005, 07:47 PM
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Add to the list a blown head gasket, burned piston, cracked sleeve...
It really doesn't matter what causes it, it's what you are going to have to do to fix it...and that won't be evident til you tear it down.
Old 01-18-2005, 08:03 PM
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Squirt a little oil in the cylinder. If compression goes up it's rings, if not it's valve or head gasket (although headgasket would be low compression and you'd most likely have antifreeze in the oil).



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