[AT] HELP I'm stumped. truck problems, overheating

[Mike]

Charlie, I'm not a fan of coolant leak sealers, I prefer, as I'm sure 
you you, to fix the problem correctly. However, when my daughter's jeep 
started leaking coolant, in multiple places,  I used a product call 
K-seal. It's not cheap, about $15 a bottle, but damned if it didn't work 
like a charm.  If it is an air bubble, take your truck and jack it up as 
high as you can on the coolant reservoir side and let it run for a bit. 
The air will work it's way out of the system.

Mike M


On 8/29/2015 3:25 PM, charlie hill wrote:
> Ok guys, my 06 GMC 5.3 liter engine started
> overheating when first started up.  It would get up
> to about 220 or 230 degrees.  I could turn the heater
> on and get NO hot air flow.  Then all of a sudden
> it would start to cool and the heater would blow hot air.
> OK easy, bad thermostat.
>
> I go and get a new t-stat and put it in.  Same problem except
> worse.  Now it gets up close to 250 before it starts to cool down.
> I took the old thermostat in the house and put it in a pot of water on
> the stove with a cooking thermometer in it.  It opens and closes as it
> should.
>
> Anyone got an idea what is going on?  For those not familiar with
> the 5.3 GM engines the t-stat is not in the intake like GM motors of
> old. It's in the front of the water pump housing so it should not be
> prone to having an airlock at the thermostat.   I see no sign
> of bubbling in the coolant.  I'm not loosing an appreciable amount of
> coolant and there is no sign of coolant it the water or out the exhaust.
> I did however have to add some coolant a few weeks ago which is unusual
> and I have smelled an odor that smells like a coolant leak.  It's the same
> odor you smell in the cab when a heater core is leaking.  But I haven't
> found
> any sign of a leak anywhere.
>
> Right now I'm sitting at home with both of my vehicles not running.  I need
> answers quick.
>
> Thanks
>
> Charlie
>
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at
>