Pressure in coolant

[Trenchking]

98 613,E7 etec,355/380, ran fine yesterday, first couple hrs this morning, excessive coolant being returned to surge tank, heater hoses go cold instancely, changed water pump and thermostat, work perfectly for 100 or so miles, right back to doing it again! Compressor maybe?

Any ideas?

Thanks

[Truck Shop]

                                Install a pressure tester, do not pump up leave it at zero on the gauge start engine and see if gauge climbs. Get a Napa block check tester go by the instructions.

                                If you see bubbles and it turns the fluid green there are exhaust gases in the cooling system and clamp off the compressor cooling lines while testing if you can.

 

                                Truck Shop

[Trenchking]

Never heard of a block ck tester!

Can't block compressor lines! I do have pressure tester, but that won't tell you if it the compressor or head gasket! Motor only has 200 thousand on a Mack inframe! Just not sure how come it ran for 100 miles perfectly after new pump and thermostat,then instantly acted up! 

[41chevy]

35 minutes ago, Trenchking said:

Never heard of a block ck tester!

Can't block compressor lines! I do have pressure tester, but that won't tell you if it the compressor or head gasket! Motor only has 200 thousand on a Mack inframe! Just not sure how come it ran for 100 miles perfectly after new pump and thermostat,then instantly acted up! 

The block test checker is called a Combustion Leak Detector Kit. It  has a fluid you add to it and if there is any compression gases in the coolant , the fluid turns to a yellow/ green color. Napa #BK7001006 or, Lisle #75500 and a few others make the kit, runs 40 / 50 dollars. If not than look to the compressor.

If you buy one follow the instructions exactly.    Paul

Edited February 10, 2018 by 41chevy

[Trenchking]

Found out that the vent hose was plugged,runs from the top radiator hose to the surge tank! If that's plugged will it cause my problem, I'm not sure, would like to think so! If it can't vent, will it overflow out catch can?

[Lmackattack]

 some of the later R models and early CH models had a known issue with surge tanks and coolant push issues, did you replace the cap yet?

 

[Trenchking]

Haven't replaced the cap,but plugged vent will cause same symptoms, right? Trying to get back on the road for now, going to update the tank setup asap!