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1998 Ford F-150 Question: coolant spill in to the injector port

 

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godsoutlaw, 5.4L V8, Lawrenceville, GA, March 15, 2011, 17:54
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 Enthusiast

i had a faulty coil pack and to gain access i removed the fuel rail. in doing so some coolant got into the fuel injector port. when i started the truck i heard a ticking sound from the first cylinder where the water got in. sounded like the truck had no oil . the oil level is fine . I figured it would burn out but instead i immediately shut the engine off. what kind of damage could it cause if any,and if not what should i do? i thought of removing the spark plug and blowing it dry and changing the oil along with all the spark plugs while im at it. the truck was running maybe 5 min..tops What should i do? . Prior to this the truck ran like a charm except for the slight bucking due to the faulty coil pack .Need help?

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  • Answer #1

    raiderron March 15, 2011, 20:32
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     Master

    I would think that after running a full 5 minutes the small amount would be gone if in fact is a small amount, if wasn't then I would have expected a hydraulic on that cylinder, Think about how many rpm that made in 5 minutes at idle. Remove plug, blow it out as best you can and restart and see what happens. I personally wouldn't be afraid to do that on mine but you have to make the call since is yours. Maybe the ticking sound has to do with coolant on the injector. heck somebody on here will have another point of view so wait a bit and see.

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    Visitor, March 15, 2011, 21:03

    i'll give it a shot in the morning .thanks i'll let you know how it went

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    raiderron, March 15, 2011, 21:54
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     Master

    Please do.

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  • Answer #2

    Henderson from Toyo Automotive Services Inc, March 16, 2011, 18:06
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     Technician

    Water getting into the cylinder created a slight hydro lock. This happens when excessive fluid is in the cylinder and the piston moves to Top Dead Center. The fluid cannot compress and therefore damage occurs. There could be valve train damage, lifter or bent valve stem at the top above the valve guide. Most technicians think a hydro lock damages the bottom end. In some cases it can cause damage in the valve train which is in the cylinder head on this vehicle. The only way to determine what is going on if the noise don't stop is to do a mechanical inspection which involves partial dissambly. A compression test on that cylinder would not hurt if the vehicle continues to run rough and or make noise.

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    Visitor, March 17, 2011, 04:03

    im confused please elaborate a little more, top as in the head or bottom as in cylinder and crank . (block) wheres the damage results.

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    Visitor, March 17, 2011, 06:31

    As Toyo states the top is the cylinder head where the valves are at, and the bottom is the block where the pistons are and the crankshaft.

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    Henderson, March 17, 2011, 09:31
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     Technician

    Top Dead Center is when the pinston travels to the up most position in the cylinder head. When this occurs as the crankshaft rotates the piston reverse direction. When the pistion is at top dead center, it moves very close to the cylinder head and valves. If coolant is in the cylinder when the valves are closed damage will occur due to a hydro lock condition. On the other hand, botton dead center is when the piston travels to its lowest position in the cylinder bore which is in the block. These represent piston travel. Most vehicles have piston travel of 3 to 4.5 inches depending on crankshaft design.

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