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+--- Thread: Zero pressure cooling system (/showthread.php?tid=7676)
Zero pressure cooling system - Smiling lemon - 08-30-2021
Cm2350
Demandated
613k miles
W900
New air compressor
EGR cooler exhaust gas pathway welded shut
I have been pushing coolant out for a little while now and put a catch on the overflow valve nipple. I put a pressure gauge in the cooling system to watch pressure(generally did not exceed 8psi) if I was climbing a steep grade and locked the engine fan to ON, the pressure would stay the same regardless of boost pressure. If I let it rise up to 210 the pressure would hit 15 and the valve would open. I have also had higher oil temperatures since chasing this coolant pushing out issue.
Today I decided to go to a zero pressure system and oddly enough my oil temperature dropped by 10 degrees and my coolant temperature seems to rise slower on the grades that before I was turning my engine fan on for. There truck seems to run at coolant temperatures similar to when I bought it pull is still higher. Oil was running about 240 and now around 230.
I was having overheating before but it could have been superficial feeling do to my previous experience being a company driver and having smaller radiators(I have no statistics or measurement)
I was told with a blown head or any of the such you will be stuck in boiling temperatures and your cooling system pressure will follow boost pressure.
RE: Zero pressure cooling system - Rawze - 08-30-2021
ITS CALLED AN OVERHAUL!.
You keep driving that thing with head gasket issues AND YOU WILL ETCH THE TOP OF THE BLOCK AND RUIN THE ENTIRE ENGINE!
RE: Zero pressure cooling system - Smiling lemon - 08-30-2021
I figured that much but as far as driving it goes I don't have much of a choice. Haggai is supposed to call me back tomorrow to tell me when they can do a diagnostic and said they won't be able to overhaul till October.