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Old 06-23-2014, 12:49 PM   #133 (permalink)
California98Civic
Cyborg ECU
 
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Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,299

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
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"Test don't guess"

Quote:
Originally Posted by johnlvs2run View Post
I don't know. I am curious because they didn't check mine.
I went back to the mantra of "test don't guess" and got a block tester to test for exhaust gasses in my coolant. Warmed the engine running some necessary errands, then let it sit in the driveway until the fan turned on automatically twice. Drained enough coolant with a dropper to prevent contaminating coolant from getting into the tester. Pumped the hand pump gently maybe 7 or 10 times, watching the bubbles run through the filter thing. Here are the results:



Blue fluid means no exhaust gasses present. My head gasket is fine.

If the head gasket were leaking, exhaust gasses would turn this blue fluid yellow. There is no head gasket leak. For the cost of $7 in testing, I saved maybe $40 on the replacement head gasket. And of course the labor. And the risk of messing up the factory job, which is apparently still very good.

EDIT: And thanks johnluvstorun for the question that made me explore whether my head gasket conclusion was warranted. It was not. Hahaha! "Test, don't guess."
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.




Last edited by California98Civic; 06-23-2014 at 10:05 PM.. Reason: the head gasket was $40, not $100
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