Does anyone how difference there would/should be between a coldcranking compression test and hot cranking compression test?
Thanks
HyperValiant

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1960 Hyper-Pac Valiant(rolling test-bed)
1963 Valiant V2OO(Son's summer project,- he just turned 15 )
1972 Valiant 4dr(Daughter Kelly's repair in progress)
1974 Valiant (v8) daughter Kelly's work in progress

Cold test might be less consistent between cylinders and read lower than a hot test. No oil on the cyl walls can make the seal worse unless they rings/cyl finish is perfect.

Lou

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Home of Slant6-powered fun machines since 1988

hot means operating temp of the motor (its been running for 10 or more minutes) cold is room temp. be careful doing a hot because the motor wants to run and ITS HOT

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anything worth doing is worth re-doing, again and again and again...........