I have a silverado and the radiator fluid is going some where and there are no leaks and the oil is clean?

GM has a TSB for the coolant plug on the right head and the temperature sensor on the left head leaking, it would leak on the head or exhaust manifold thus not leaving any spots under the truck. It also states that it may apear to be a leaking head gasket.


The procedure states to seal with pipe sealer and reinstall to 37 ft/lbsI have a silverado and the radiator fluid is going some where and there are no leaks and the oil is clean?
FILL COOLANT,RUN UNTIL TRUCK WARMS UP. LET IT SIT OVERNIGHT. SEE IF THERE IS COOLANT BELOW THE FAN BLADE....WATER PUMPS ARE COMMON. INTAKE COUL BE LEAKING IN BACK RUNNING OVER BELLHOUSING,BUT THAT WILL BE A SLOW LEAK.I have a silverado and the radiator fluid is going some where and there are no leaks and the oil is clean?
Have it pressure checked with a U V dye and a black light, if you don't have white smoke out of the tailpipe and nothing in the engine oil, don't forget to check the transmission fluid, if you have an auto trans, you also have a cooler in the radiator and with the motor off and 16 lbs. of coolant pressure, it could leat into the cooler.
TAKE IT TO THE LOCAL GARAGE AND HAVE A COOLANT PRESSURE TEST, THAT WILL TELL YOU ALL.
In addition to the other answer; it could still be a head gasket - the coolant could be leaking into one or more cylinders.
If you have a cracked head gasket, you will not see any leaks, the radiator fluid burns off and out your exhaust it goes. If you truck is burning white smoke out the back have it done soon. you could warp the camshaft and ruin your motor.
I would start with a pressure test on the cooing system.


If no external leaks are found then drain your oil as the coolant will settle to the the bottom of the pan .


If you have coolant come out first before the oil .


If so you have an internal leak.


The lower intake gaskets are famous on the 5.7.


The water pump and the heater hose connector going into the intake manifold as well have replace lots of all on these


year of truck would help


Good luck