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Hello, the engine is most likely hydrolocked. The egr cooler is the most common weak link that will allow coolant to hydrolock the engine, that or a head gasket failure. If not modifications have been done and depending on the mileage of the truck, you can prepare to drop a lot of money into a head gasket repair. The coolant system would need to be drained and coolant allowed to get out of the cylinders in order for the engine to turn. This is something best handled by a shop unless you have experience doing heavy line repairs on these diesels. You can do everything right and something else fail. These six liters are known for multiple issues. The engine oil cooler should be replaced with the egr cooler.
Drain the cooling system, remove the egr valve. Jack up the rear of the truck so it sits higher than the front and allow it to gravity flow out as much as possible. If there is an issue with the cooler, water will be in the intake and flow out from the egr valve opening.Once the engine cools down enough and drains, leave the egr valve out and attempt to crank the engine over with no water in it.
It may not flow out of the egr port when removed but probably push out of blast out when it goes to crank
Do you need more help with this concern?
Hello, do you need more help with this concern?
Hello, the question remains open until it is rated, if you need more help let me know