[DML] Re: Running hot when it's hot out

["Harold McElraft" <hmcelraft@xxxxxxx>]

I don't think you have all of the air out of the cooling system. 
Probably at the radiator. The integrated bleeder (small hose from the 
top of the radiator on right side) may not be working, stopped up, 
hose in a bind, etc. Also, air can get trapped in the right bank head 
near the temp sensor. Can you elevate the rear - like on a steep 
driveway to bleed?

The torgue converter creates a LOT of heat and heats the return 
coolant - that's why automatics run hotter than 5 speeds. 

Harold McElraft - 3354


--- In dmcnews@xxxxxxxxxxxxxxx, Joe Angell <jangell@...> wrote:
>
> 
> Here's a mystery I've had for some time now:  When it's hot out, 
my  
> car runs hot.  It's fine most of the time, but once it gets above 
~70  
> degrees out, the car starts to run hotter than it should.
> 
> For example, if it's ~80 degrees out, the car might run at 220 or 
so  
> when moving at highway speeds (~3000 RPMs or so, I'd guess; 
whatever  
> 70 MPH comes out to in 3rd on an automatic).  When ~100 degrees 
out,  
> it gets up t 240, the first redline on the temp gauge.  It will 
drop  
> back down a bit once I get off the highway, but not down to the  
> acceptable range.
> 
> I checked for coolant leaks and found none.  The coolant bottle 
was  
> about 1/2 full, as it should be.  I bled the system at the 
radiator  
> and water pump and found no air at all.  I replaced the thermostat  
> about a year ago, but this made no difference.  The water pump is  
> about 5 years old, which is when I had an engine overhaul done.  
The  
> radiator is one of the new triple-core brass ones, also 5 years 
old.   
> The cooling fans are running fine, and go on at the proper 
temperature.
> 
> Any suggestions on what I should check next?  It's rather  
> infuriating.  I was thinking of bringing it to a radiator shop and  
> having them purge the system, but I'm not sure if that would help.
> 
> Thanks!
> 
> -- Joe
>



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