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Answered in 10 minutes by:
10/29/2012
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
Experience: I am ASE Master Truck Certified.
VerifiedHi. Thanks for using JA! I will try and help you out.
There are three things I have seen cause coolant to be pushed out of the radiator.
The first is a cracked jacket water pre cooler. It is located between the turbos and the air cooler. I have seen them crack and when the engine is making boost pressure, it puts air into the cooling system and increases the pressure. Then it will push out coolant. I would check the pre cooler.
Next is a blown head gasket. You should be able to attach a pressure tester to the radiator and run the engine at high idle. If the gasket is blown the system will build pressure.
Lastly is a cracked head. I have seen this several times before. If the pre cooler is ok, I would remove the head and inspect the head gasket. If the gasket is ok. I would haw the head pressure checked.
Please reply back if you need more help or have more questions.
There are three things I have seen cause coolant to be pushed out of the radiator.
The first is a cracked jacket water pre cooler. It is located between the turbos and the air cooler. I have seen them crack and when the engine is making boost pressure, it puts air into the cooling system and increases the pressure. Then it will push out coolant. I would check the pre cooler.
Next is a blown head gasket. You should be able to attach a pressure tester to the radiator and run the engine at high idle. If the gasket is blown the system will build pressure.
Lastly is a cracked head. I have seen this several times before. If the pre cooler is ok, I would remove the head and inspect the head gasket. If the gasket is ok. I would haw the head pressure checked.
Please reply back if you need more help or have more questions.
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
Experience: I am ASE Master Truck Certified.
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