![]() ![]() If you have the original EGR cooler (usually still painted red) and no external signs of leaks, look at your exhaust. You will also have signs of oil/coolant cross-contamination. ![]() If the measured pressure loss in the EGR cooler is more than 15 psi in 15 minutes the EGR cooler is not usable. In rare cases, the fault is in the turbo or the air compressor (but very rare). Once EGR cooler is removed it can be properly pressure tested with test kit. Removal of EGR cooler for pressure testing is required. At this point the EGR cooler is suspected as the source of coolant loss and must be verified by removing the EGR cooler connection pipe to visually inspect the inlet of EGR cooler for signs of coolant.Īfter removing connection pipe, a visual inspection can verify if coolant is present. Coolant deposits were found in the turbocharger turbine housing and can be identified as dried white deposits coating the inside of turbine housing. ![]() After testing liquids at band clamp for coolant, it was confirmed that coolant was present in the exhaust system.įurther troubleshooting lead to the removal of the exhaust piping behind turbo to visually inspect the turbo housing outlet/exhaust side. In this case signs of coolant and soot mixture were showing at the button of v-band clamp behind turbo. Pressure testing coolant system to aid in locating coolant leak is helpful but, when the leak is internal more components may need to be removed to help locate leak. Testing soot deposits with test strips will identify whether there is coolant present. Check the torque on the four bolts that hold the actuator to the turbo. Not so easy fix if it is an internal turbo leak. Coolant loss drown stream from exhaust can sometimes be mis identified as oil but, this could be a coolant and soot mixture. Dry everything off with compressed air and check the coolant inlet fitting on top of the turbo, and the braided hose coming down to it. Signs of coolant loss may vary from cylinder block to head, water pump, EGR cooler, Turbo actuator, coolant system lines or radiator. When troubleshooting loss of coolant, it is very important to use a knowledgeable shop to save you not only money, but also time. That tube feeds coolant to the turbo and heater core back at the firewall. Mopar Part 68049022AA Getting that tube out to replace it can be a bit of a pain. Reply Save Like 1 KhakiCummins 3 It's just an o-ring. The EGR cooler is one of the components that will leak and in some cases be diagnosed incorrectly. 1 1 - 10 of 10 Posts 5.7 Hemi 2 Should just be an o ring. Coolant loss is a major issue and must be repaired at the units next stop. recommends the use of fully-formulated antifreeze or coolant containing a precharge of supplemental coolant additive (SCA) for the ISX15 CM2350 X101. Before troubleshooting, it is important to also determine the exact complaint by interviewing the driver and looking at the ECM information. An internal or external loss of coolant on your Cummins ISX 15 must be checked correctly in order to determine the root cause. ![]()
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