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10-13-2012, 03:00 PM #1
Can't get my 305 over 150 degrees Any help would be apprecieated!!!!
I already tried------ 3new t-stats--changing hoses--bypassing the heater---running with out the fan --closing off the rad. and changing the heater hose from the rad. conection to the old style water pump connection. NOTHING HELPS !!!!!
10-13-2012, 03:04 PM #2
- Join Date
- Mar 2007
- Grand Prairie, Texas
- Blog Entries
Are you sure your gauge is reading right?
It's very rare for an internal combustion engine to run to cool.
10-13-2012, 06:53 PM #3
I think you changed everything but the gauge, try a water temp meter and see if the gauge is correct.Ray
'09 Avalanche LTZ - Black
'05 Envoy XL (sold)
10-14-2012, 09:47 AM #4
could be the thermostat is the wrong one allowing coolant to bypass it. I would hook up all the coolant system as built OEM and when removal of the thermostat make sure that it is properly seated into the bore so that no coolant can go around it. should be a 195 deg f thermostat on temp. all thermostats should be tested before installing I found many NEW defective ones. could be on this 305 you need a rubber gasket on the outer circumference of the thermostat.
10-16-2012, 09:13 AM #5
10-16-2012, 09:18 AM #6
1995 Silverado 4x4
6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge
2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
2002 Silverado ext cab 2wd (Sold)
2003 Yukon XL (Totaled)
10-25-2012, 09:22 PM #7
- Join Date
- Oct 2012
A failsafe will open at or around 150*. With winter coming, you not be able to defrost the windshield.
10-26-2012, 10:14 AM #8
I put Gates T-stats in, none of them were marked "failsafe" , do I have to request standard ? Keep the suggestions comming everyone.
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