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150 psi compression?

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Old 11-18-2017, 05:14 PM
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Default 150 psi compression?
My 00 LS1 is slowly losing coolant and showing ~150 psi compression on all cylinders. That’s exactly where it should be for stock 10.1 compression, but seems low to me anyway. Is this normal?

67 Camaro LS1/4L60E
09 Silverado 2500HD 6.0L

Previous LS rides: 98 Camaro LS1/T56, 99 Silverado 5.3L
Last edited by tracetrimble; 11-19-2017 at 06:56 PM.
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Old 11-18-2017, 09:05 PM
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Seems low to me, my 8.75:1 Turbo Buick S-truck is 155# and the stock 280ZX I had many years ago was 215#.
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Old 11-19-2017, 01:56 AM
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It doesn't seem too alarming if all of the cylinders are equal. Try pressure testing the cooling system.
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