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Old 05-04-2018, 09:15 PM   #365 (permalink)
California98Civic
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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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Quote:
Originally Posted by 19bonestock88 View Post
Looking good so far! If you have a Dremel you could port the intake manifold while the head is being machined... not sure if it would help your build though
I'm just gonna clean them. Got verything apart today. The head is with a very good engine rebuilder here. Getting a pressure test and resurface.

Here is the head gasket, which was installed in Ohio at Honda's Ana Engine plant in January 1998. It ain't pretty anymore:



What you see is the top of the gasket, with #1 on the right. The black is the sealant material on the gasket. As you can see, much is gone & compromised. Oil was getting into coolant, combustion gas was in the radiator, and burning coolant produced a little white smoke out the tail pipe. But there was no coolant in the oil. I can see that story looking at this. The two oil inlet ports are bottom right and bottom left. Two oil return passages are at the top, rectangular in shape. Gasket material is atill good all around there.

Tops of the pistons are caked with black tar:


Valves are black. And exhaust valves on one, two, and three are also coated with burnt gray carbon that cakes off in brittle chunks.

Gonna clean everything thoroughly and check the cam and do the cam seal too. Then valve lash adjustments.

I got 260,000 miles and 20 years out of this gasket. Solid.
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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.



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