Re: [DML] Re: Overheating from Coolant Leak
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Re: [DML] Re: Overheating from Coolant Leak

DeLoreans don't like to be overheated.  Once the coolant level drops 
significantly, the temp guage is not reliable.  Also, once you shut the engine 
off, it goes into a heat soak until it can air cool, which means the 
temperatures can actually rise for a little while before they start to drop.  
This is even worse when you don't have any coolant in the water jackets around 
the piston liners and in the head to take up some of the heat.  Even though the 
water is not circulating, it helps get heat to the outside of the engine block 
and keep peak temperatures lower.  My guess is that you probably have at least 
one blown head gasket and potentially warped heads.  Get the leak fixed and have 
a compression test, a coolant check and an oil change.  There is a test that 
looks for combustion byproducts in the coolant that will tell you if gasses are 
escaping into the coolant.  Checking the oil will tell you if there is coolant 
letting into the sump.  


From: Rick Heile <rick.heile@xxxxxx>
To: dmcnews@xxxxxxxxxxxxxxx
Sent: Tue, July 27, 2010 11:15:43 AM
Subject: [DML] Re: Overheating from Coolant Leak


I hope you are more lucky that I was. I too had a very short engine overheat 
which I quickly shut down and repaired the problem. Since then I noticed that I 
was losing coolent, about 2 cups/100 miles. I went through my entire cooling 
system replacing many things but this coolent loss did not change. The end 
result, I had cracked my head and coolent was leaking into the cumbustion 
chamber and burning as steam along with the fuel. This was noticible when first 
starting I had quite a bit of smoke coming from the exhaust. Anyway, this winter 
I am sending my heads out to be repaired. Since then I keep a gallon of coolent 
in the trunk and daily check and refill the coolent level.



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