A member here called Heavyd, is extremely familiar with Cummins engines. Sign on to Cummins (you'll need engine serial #) and you can find out just about anything there. It uses at most 1 quart of coolant a month after rebuild. You let it set for 5 minutes does the same cough and clears. It coughs white smoke (smells like antifreeze burning sweet) for 5 second and clears and runs perfect. The longer you drive in this condition, the more you risk extensive internal damage. When truck comes back in after a days work and you fuel up, then go to start it. ![]() If it just started losing coolant, stop driving it immediately and get into a certified Cummins repair facility. ![]() It will be white and smell sweet like coolant.(this can also be the above mentioned as well) Unfortunately, any coolant loss, other than an external leaking hose/pipe/radiator is usually very bad news for your engine. 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. In rare cases, the fault is in the turbo or the air compressor (but very rare). Usually a blow head-gasket, dropped cylinder liner, or cracked head (over-heated). Make sure you clean all connecting faces. recommends the use of fully-formulated antifreeze or coolant containing a precharge of supplemental coolant additive (SCA) for the ISX15 CM2350 X101. About 7 months ago coolant started coming out my reservoir tank (pressure relief cap) got to the shop, it was tested coolant had gas, so head was removed tested turned out to be a bad head. Coolant In The Engine Crankcase Adept Ape 214K views 5 years ago Cummins Coolant Overflow/ Coolant loss/ Excessive Pressure in. Cummins Graphite Turbo Charger to Exhaust Gasket & Bolt Kit Engine Crankshaft Seals Upper End Gasket Kits Engine Maintenance. ISX-15 pushing coolant from pressure cap on reservoir tank Hi. You have compression inside your coolant system. What Causes Coolant In The Oil Antifreeze In The Oil. It reaching 225 is not something to worry about Like damaging internal parts Technician: Nich1019 No, 230/235 is about the max. If external it could be blowing out the serge tank (rad cap). 210-212 But it did reach up to about 220 close to 225. There is not an external leak anymore, it previously had a leak at the coolant filter, filter valve o-rings, and then the fill cap on the surge tank. ![]() find out if leak is internal or external. In the fleet here, there is a 2008 Peterbilt 388 with a Cummins ISX that is losing coolant at about a gallon a day (around 350miles).
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