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first you must determine what is actually contaminating the coolant,usually in the detroit series 60 engine it is fuel oil,usually caused by faulty injector cups!

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Q: What could cause oil leak into coolant reservoir of a Detroit engine truck?
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Related questions

Can no coolant in reservoir cause engine not to start?

Coolant is used to keep an engine in a vehicle at a temperature safe for operation. If no coolant is in the reservoir, an engine will not start.


Could the bottle for the coolant cause over heating if it has a split in it?

If the coolant reservoir can not maintain the proper level of coolant, it is possible the engine could over heat when the level drops.


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Can a bad radiator cause water to bubble in the cars reservoir?

No, this could mean you have a cracked head gasket and engine pressure has entered the coolant.


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The radiator cap could be the cause of coolant reservoir overflow or backup. Have the cap checked to see if it is bad.


Does a bad thermostat cause coolant to leak out?

It can if it is stuck closed the engine overheats causing hot air ( steam ) to flow backwards to radiator cap which releases and blows steam pressure into recovery reservoir which starts blowing out the coolant in the reservoir making a puddle on ground.


What would cause oil in the coolant reservoir in a 93 buick century?

There are a couple of things that can cause oil to get into your coolant reservoir. A blown head gasket or a broken piston ring are the most common causes.


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Head gasket failing The most common cause is a blown head gasket. Stop driving the car as severe engine damage will occur.


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In the engine compartment on the drivers side towards the back of the car there is an overflow reservoir. The reservoir is a sphere, off-white in color and has a 3" diameter black cap that screws on. The cap made to loosen by hand, but usually takes a lot of strength and grunting to remove.WARNING! Do not remove the cap if the engine is warm, hot coolant may spray out and cause severe burns!There are coolant level marks printed on the side of the reservoir. Because of the age of the plastic reservoir, it is no longer transparent. This means the coolant level cannot be checked without removing the cap an looking inside.


Where does the antifreeze go in a 1996 VW Cabrio?

In the engine compartment on the drivers side towards the back of the car there is an overflow reservoir. The reservoir is a sphere, off-white in color and has a 3" diameter black cap that screws on. The cap made to loosen by hand, but usually takes a lot of strength and grunting to remove.WARNING! Do not remove the cap if the engine is warm, hot coolant may spray out and cause severe burns!There are coolant level marks printed on the side of the reservoir. Because of the age of the plastic reservoir, it is no longer transparent. This means the coolant level cannot be checked without removing the cap an looking inside.


What would cause a 1989 Ford F-250 6-cylinder to overheat after the engine is turned off but not while running the fluid in reservoir boils and overflows?

Check for low coolant level.