3.7L MerCruiser 1/28/2023 VLOG Engine combustion gas in coolant test

Easy affordable engine Test is to determine if head is cracked, or head gasket has failed. This video shows marine engine with closed cooling system but can be done okay on automotive engines such as the Astro Van.

[@johnwauters584]

Did you ever find your leaking. My engine is losing coolant while sitting. Your videos seem to not finish where you fixed the leak.