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I agree with Bill.
This is THE classic symptom of a blown head gasket. You get this, you pull
the head(s).
Any trace of vapor in the exhaust? Might be some coolant residue on the
spark plug(s).
Jack Ford
----- Original Message ----- From: "Bill Dube" <bdube@al.noaa.gov>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, June 08, 2005 2:51 PM
Subject: [FlyRotary] Remaining pressure when cold (Re: coolant leak)
>
>I don't get it. What is wrong with the cooling system remaining
>pressurized? Mine does and always has.
>>>> You have a copression leak if.... <<<<
You have a compression leak into the cooling system. Residual
pressure is the classic symptom. (The next thing you will see are tiny
smoke-filled bubbles in the cooling water.) You are going to have the tear
the engine down to fix it.
>>>> Why there is no residual pressure normally <<<<
is gone. Thus, you may possibly see a tiny pressure remaining the first
time, but never again.
>>> Smoke-filled bubbles = compression leak into the cooling system <<<
If the compression leak is severe, you can sometimes see little
smoke-filled bubbles in the coolant. Fill it to the top and don't put the
cap back on. Run it at idle and little smoke-filled bubbles may be seen
rising to the top. If you see these, you definitely have a compression
leak
into the cooling jacket.
You don't always see the smoke-filled bubbles, by the way.
Bill Dube'
>> Homepage: http://www.flyrotary.com/
>> Archive: http://lancaironline.net/lists/flyrotary/List.html
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