After you take the Head off, put a straight edge across the top of the
block, for flatness there also.
-----Original Message-----
From: Ronnie Day <ronday@home.com>
To: Adam Bradley <ambradley@yahoo.com>; Roadster List
<datsun-roadsters@autox.team.net>
Date: Friday, June 08, 2001 5:14 PM
Subject: Re: It's the head gasket
>> Well, after flushing and burping and still overheating, I'm pretty sure
>> it's the head gasket. The car actually runs cool enough if it just
>> idles, but once it gets up to speed and under load it heats up too
>> quickly.
>>
>> I noticed that the water level in the overflow tank keeps rising and it
>> is covered with a frothy white foam. I assume this is from the air in
>> the system pushing the water out and some of the air rising to the top
>> (the foam). If I'm mistaken about this, please let me know. Otherwise
>> the parts are going to be ordered soon, the electric fan is staying on,
>> and the head's coming off and going into a machine shop.
>
>It could be the head gasket. In fact the "white foam" sounds like oil in
the
>water. Air bubbles just dissipate, doesn't any kind of residue. Have you
run
>a compression check? Can't hurt, but then you can have a leaking head
gasket
>that's not into a cylinder.
>
>Regarding the timing, if it's off it could cause over heating above idle,
>too. Set the points first and then set the timing. Does it still overheat?
>Changing the point gap or the dwell changes the timing. That's why you set
>the points first, then do the timing.
>
>Like I said before, be methodical, do one thing at at time. Don't jump to
>"obvious" conclusions. Verify suspicions by testing. Trust me it'll cost
you
>less in the end.
>
>HTH, Ron
>
>Ronnie Day
>ronday@home.com
>Dallas/Ft. Worth
>'71 510 2-dr (Prepared Class Autocrosser)
>'73 510 2-dr (Street Toy)
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