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After that, for me, the 'trick' was to: 1) Make sure the coolant overflow bottle is filled to the max level. 2) With the engine cool, top up the radiator with coolant and install the radiator cap. 3) Start the engine. 4) Let the temp get to about 180F - 190F. 5) Shut off the engine and let cool for about 30 minutes.Really simple easy test. Remove belt from water pump, fill radiator to tippy top. Start cool engine and rev engine up and down a few times. If coolant rises and overflows, you definitely have a combustion leak. This is a test to be done in a minute or less so normal heating does not give false reading.I have a 2002 Ford Explorer and I am still trying to figure out why the coolant will overflow in the radiator reserve tank. I put in a new thermostat and a new cap to the overflow tank. When the tank is cold, sat over night, I put in new anti-freeze to the cold coolant line. Then I start up the explorer and let it run for a while.Coolant Overflow Boil But No Overheating. I have a 1996 Suzuki Sidekick Sport and having a strange issue with the coolant. If I take it out on the highway for any length of time, once I get to my destination, the coolant overflow is bubbling and boiling, yet the temp gauge in the vehicle stays right in the middle.RE: ISX-15 pushing coolant out of reservoir tank -help-. I suggest when you make it home, open up the rear flange behind the egr cooler. You'll be looking for coolant, or white residue. Next would be to drop the oil pan, pressure up the coolant system to 20lbs and look for coolant running down the liner's.My 2006 Peterbilt 379, Cummins ISX engine, has used 4 gallons of coolant this week. It does not appear to be leaking anywahere, but when the truck is running, you can smell hot coolant around the passenger side. The low coolant light never comes on while running, but only after being shut off for 12 hours or more. I'm guessing EGR cooler?The coolant levels out after i let the pressure out. I had an oil sample today at Speedco to check for coolant in the oil caused by Head Gasket. Oil Sample came back clean. Does not overheat, normal oil temp, no power loss, no white smoke in the stacks. Coolant tank is turning darkish with gummy residue in the wallsAdd a coolant recovery tank into the over flow line.. I make my coolant recovery tanks out of 2" black ABS plastic pipe, about 18 or so inches long. Glue a cap to one end, drill a hole into the cap for a 1/4" fitting, attach the overflow tube to same. Drill a hole large enough for a 1/4" elbow fitting about 2" below the top end, attach a piece ...Jun 1, 2015 · I just recently had some overheating issues on my 4wd Tacoma and, after replacing the thermostat, water pump and radiator cap, the truck drives fine WITH JUST TAP WATER IN THE COOLANT SYSTEM (which I will replace with real coolant after I'm done testing) but, when I check the coolant spillover tank right after driving, I see it mildly boiling ... Posted 10/28/2015 18:43 (#4863292) Subject: Cat 3406b bubbles in coolant and pushing out overflow. Central Ohio. This is on vovlo semi tractor. Temp gauges reads normal. Mechanic says they unhooked coolant lines from compressor and bubbles still there. He says he used a testor and it shows no combustion gasses.When the engine runs and heats up coolant is pushed out the engine causing the level in the overflow bottle to go up. If it is already full, as it is in the above picture, coolant will be pushed out the vent tube for the bottle. Hot or cold, it should never be as full as it is in the above picture. Old Dogger and f6maniac.Posts: 2,321. Let's take a look at why the coolant is coming out the overflow tube. The spring in the pressure cap has to be overcome by the pressure in the cooling system. Once that happens the rubber radiator cap gasket lifts off the filler neck seat and coolant flows out and down the overflow hose.If you have a cooling system pressure tester you can test the cap, if not they are a maintenance item and fairly cheap, let the coolant get down a little to leave room for expansion. then see how it does. Of coarse if this isnt the problem, then we are looking combustion in the cooling system pushing the coolant out, in this situation, if you ...When the engine is running, coolant is flowing. Shut down an engine right after a hard pull and all the heat just stays there concentrated in the block. Its always a good idea to turn on the fan and let it idle for 5 minutes before shutting an engine down as it allows the coolant to carry all that heat away.

Diesel engine (John Deere 6068 ). Open radiator cap. Start the engine cold. One person watches the fluid in the radiator while another person guns the engine and then drops it back to idle rapidly. The water bubbles in the radiator when the gunning/idling occurs but it is not bubbling otherwise. I say it's not a sign of a blown head gasket.The coolant was being lost through the coolant overflow hose. I fought with this, stopping every 30-45 minutes and adding 1/4 to 1/2 gallon of water. The engine never did run hot, with the hottest it ever got being a hair over 200.Cooling system held a vacuum at 17psi for 1 hour with no drop. Both fans kicking on and not running slow. Thermo is opening but as the engine heats up, pressure builds and the hoses bulge. Radiator and heater core flushed twice Steam pouring out of overflow hose from heads to overflow tank. Intermittent water spitting out but mostly steam.Dec 9, 2007 · My Volvo has a new multichamber coolant overflow tank that transfers coolant onto the ground. On one side of the tank, the sensor tells me I'm low on coolant, so I fill it up to the line. Then, the truck runs warm for a few hours, and coolant flows back into the other side, eventually filling up that chamber until it drains out hose to the ground.

This is done by sucking gases in either the radiator or overflow tank and mixing with a chemical. Be careful though, if your water pump has failed, coolant may back up in the radiator or overflow tank if no radiator cap is present. If the test shows no exhaust gases (hydrocarbons), then most likely if the thermostat (s) have been check, its the ...ImperialCrown. A coolant sample can be checked with a chemical CO2 detector. CO2 is a byproduct of combustion. If CO2 is found, it would likely be a head gasket combustion chamber-to-water jacket leak. If CO2 is not detected, it could be an air leak into the suction side of the water pump (lower radiator hose side).Technician: spankyjr1. Check your motor mounts and pressure check radiator cap. The torque of the engine under load may be pulling hose off. radiator cap may not be releasing extra pressure when it is suppose to. No on T-stat unless you are overheating, use a digital temp gun to verify accuracy of gage.…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Hey guys, I have a 2011 Mack CXU613 with a 45. Possible cause: Coolant boiling, no overtemp on gauge. 2013 Cruze 1.4L turbo. Coolant is boilin.