What now

[crows feet]

95 yukon 5.7 after replaceing intake gasket...used rubber gaskets at both ends insted of silocone,,,like stock...runs hot with thermostat,replaced radautor new one. two thermostats,just in case on was bad 210 temp range,told later should be running a 180...but why running hot..runs great with out one just not much heat...blowed most hoses and have replaced...seems to build up lots of pressure.......... any help

 

[Diller]

Most trucks operate around 200-210. If it was running at 180 with a stock thermostat (195 degree), I'd be suspect of the thermostat.

That said, my '99 Yukon is running about 180. I just had the intake gaskets replaced, but I do believe I have another coolant leak (possible flow control valve on RH side).


Diller
'99 Yukon SLT
'08 Hummer H3

 

[fire730]

Is it definitely full of coolant? When you went to replace the thermostat was the coolant full in the intake on the bottom side of the tstat?

Also for future reference throw those rubber gaskets away! Use silicone on the ends but the trick is to let the truck sit overnight before you run it so the silicone has time to cure before it comes in contact with the hot oil.

 

[crows feet]

yes was full to bottom of thrmo housing...run wy hot up to 260 fan clutch is working had to replace temp control on drivers side vac control for heat plus all hoses buddy says its blocking water ports on intake have wrong gasket.....maybe he is right had no problem till we done this but dont leak oil now....she been a good girl 265,886 miles

 

[fire730]

The next thing I was going to say was possibly the wrong gaskets.

 

[blueflamed03]

or has a air pocket in the cooling system, not allowing good coolant flow.