2006 Ford F-250 Superduty. Diesel 6.0 liter.
Question: I would like to know why oil is getting into the radiator and coolant. We were also wondering where the oil cooler is located on this truck. The antifreeze is discolored and has a sort of goo all around the radiator cap and inside.
Answer: The oil cooler is located inside the radiator. Have the cooling system pressure tested. If there is no sign of external leaks on the engine or a head gasket problem, then the oil cooler is most likely the problem and the radiator would have to be replaced. Then a good flush of the cooling system would also be needed as residual oil would still show up for some time in the antifreeze. Also do an oil change.
If the pressure test shows that it won't hold then look in the radiator for bubbles. This would be the sign of a blown head gasket. You can do this with the engine running as well looking for bubbles. Also if the engine is running bad then this could could also be the cause. Many times a blown head gasket will not show an external leak but instead the pressure will cause the mix, especially on a diesel with so much cylinder internal pressure.
Ford F-250 How To Flush Cooling System
1991 Ford f-250 xlt.
Engine Size : 351 V8.
Question: I'm just needing to know how to FLUSH my cooling system before i add new coolant to it. Truck has a lot of miles want to do some maintenance. Thanks.
Answer: There are several ways to flush the cooling system of your vehicle. Be sure to use the correct antifreeze. Do not use the newer type since you truck is older. Use good old green coolant.
- Buy a flush kit with cleaning and additive chemicals and a hose "T" from the local Autozone or other parts store chain.
- Buy the cheaper kit with just the chemicals. Instructions are on the kit. Usually running the engine until it is hot, draining cleaning fluid, then adding the additive.
- Just drain the radiator by removing the petcock.
- Go a little further and remove the coolant plug(s) in the side of the engine block. This gets a lot more out than just a drain and re-fill.
