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Roy, import/domestic specialest
Category: Chevy
Satisfied Customers: 6195
Experience:  ASE master tech for 40 years
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Chevrolet Silverado 2500 HD: 1993 chev 6.5 turbo diesel. over

Customer Question

1993 chev 6.5 turbo diesel. over heating problem.
I have replaced the radiator, hoses, cap, water pump.
I have removed the thermostat, air conditioner condenser.
freeway and around town temp stays a 110.
drive up hill and temp goes up to 260 within 10-15 min.
I do not loose water
no water in oil
no oil in water
no exhaust vapor
no performance loss
I am lost.................
Submitted: 2 years ago.
Category: Chevy
Expert:  Roy replied 2 years ago.
good afternoon my name is ***** ***** I will assist it sounds like you have a clogged radiator and the flow inside is too low to keep up with the cooling requirements. I would have the radiator flow tested by a radiator shop to be sure. I would also have a leak down test done o the cylinders to be sure that there is no cylinder head or gasket issue. Roy
Customer: replied 2 years ago.
knowing I have replaced everything external I could only think head gasket. but I don't have the normal symptoms of blown head gasket so I don't understand what area of it could have this result
Expert:  Roy replied 2 years ago.
it may not be bad enough yet to contaminate the oil. once it does, then the main and rod bearings will have to be replaced as well.
let the engine run with the rad cap off and see if there are any air bubbles in the coolant