Coolant problems

[Hedley]

(02-26-2016 )Crafter Wrote:  Mine has pressure after it warms up.. I did what gearhead said. Mine actually is so bad that at normal speeds, no issues, but the second I stop or hit traffic, all hell breaks lose and coolant spills out of my reservoir.

I too have done the oil sample and no coolant in oil. I did a Combustion Leak test and it didn't show anything. I also have blocked off my coolant lines going to my compressor and the pressure got a lot less but I'm still skeptical because I think it was my imagination. I'll do this again this weekend and see if it really did get less.

On the other hand, My little 290k 1994 toyota camry did the same thing for 4 months, no coolant in oil, but I had a bad head gasket which allowed gas to pressurize the radiator which made my toyota overheat every time I climbed a small hill.

So I'm torn. Spend $500-1000 on a new compressor head to see if that fixes the problem, or, tear apart my engine and figure out how to change the head gasket on the truck. 486k on CM871.

doesn't sound all that complicated Crafter, no coolant in your oil and no compression in your cooling system...that is great news my friend, so the problem only happens in traffic or when you stop? is your fan clutch kicking in? is your radiator clogged with bugs?, whats your engine temperature reading when this happens?, is it over 215°F?, have you replaced your thermostats yet?, have your radiator flushed out yet?, don't have time to have your radiator flushed out at a radiator shop?, Cat makes a Radiator Flush that you add to your cooling system and run between oil changes, you then drain your cooling system and add fresh coolant, this work okay but getting your radiator flushed by a professional is better.