olddesertrat
Newbie
Hello Everyone. Have a 1997 K1500 Z71. 200,000 miles on truck, bought it a few months ago with a new 5.7l vortec crate engine in it.
Have checked threads here and elsewhere. Can not find my problem, so thought would give you guys a try.
Problem: Coolant is slowly filling up overflow tank as I drive. One core radiator...so as overflow tank gets near full, the truck starts getting hot. Does not appear to loose any coolant. Burp system from air bubbles. With radiator cap off and system warmed up, no bubbles after burping at idle. rev engine, coolant level drops..no air coming out open radiator cap. Use 50/50 coolant/water mix.
Just needed to drive 550 mile round trip from Las Vegas, NV to Phoenix, AZ and back. Right around every 80-90 miles the temp gauge goes to around 210. Soon as possible pull over, stop truck. Check overflow tank, near full. Bleed air out Stant radiator cap(have replaced twice, did not fix problem). Engine not steaming with cap off. Take empty coolant bottle, put under battery. Disconnect overflow line from radiator and put into empty bottle. Wrap paper towel around overflow line on overflow tank and pressurize tank by mouth. Coolant in overflow tank flows into coolant bottle until overflow tank at correct level. Pour coolant in bottle back into radiator. Turn on truck, burp system. Close everything up...drive another 80-90 miles...repeat. Repeated this 7 times in 550 mile trip.
Again, I stop truck before it overheats. And does not appear to loose any coolant. Just slowly empties radiator by filling up overflow tank at normal operating temp. Have replaced Stant stainless steel 15 psi radiator cap twice..no change. Water pump was not replaced when engine was replace(how stupid is that?). Have a new water pump and will replace it. Also thinking of getting 2 core radiator. Am hoping these will fix problem....however would like to hear if anyone else has seen this problem and can tell me the problem is.
Also, what 2 core radiator would you recommend?
Thank in advance for any help
Have checked threads here and elsewhere. Can not find my problem, so thought would give you guys a try.
Problem: Coolant is slowly filling up overflow tank as I drive. One core radiator...so as overflow tank gets near full, the truck starts getting hot. Does not appear to loose any coolant. Burp system from air bubbles. With radiator cap off and system warmed up, no bubbles after burping at idle. rev engine, coolant level drops..no air coming out open radiator cap. Use 50/50 coolant/water mix.
Just needed to drive 550 mile round trip from Las Vegas, NV to Phoenix, AZ and back. Right around every 80-90 miles the temp gauge goes to around 210. Soon as possible pull over, stop truck. Check overflow tank, near full. Bleed air out Stant radiator cap(have replaced twice, did not fix problem). Engine not steaming with cap off. Take empty coolant bottle, put under battery. Disconnect overflow line from radiator and put into empty bottle. Wrap paper towel around overflow line on overflow tank and pressurize tank by mouth. Coolant in overflow tank flows into coolant bottle until overflow tank at correct level. Pour coolant in bottle back into radiator. Turn on truck, burp system. Close everything up...drive another 80-90 miles...repeat. Repeated this 7 times in 550 mile trip.
Again, I stop truck before it overheats. And does not appear to loose any coolant. Just slowly empties radiator by filling up overflow tank at normal operating temp. Have replaced Stant stainless steel 15 psi radiator cap twice..no change. Water pump was not replaced when engine was replace(how stupid is that?). Have a new water pump and will replace it. Also thinking of getting 2 core radiator. Am hoping these will fix problem....however would like to hear if anyone else has seen this problem and can tell me the problem is.
Also, what 2 core radiator would you recommend?
Thank in advance for any help