lock up engine??? Need Help
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lock up engine??? Need Help
ok well i just had diesel in my antifreze so i changed out injector cups and all new o rings. drove the truck for 300 miles. and went to start it and now the motor is locked up. and the antifreeze is very low. could this be a problem with the new sleves that i just installed.
Post Fiend
Joined: Nov 2007
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From: Payson, AZ
ok well i just had diesel in my antifreze so i changed out injector cups and all new o rings. drove the truck for 300 miles. and went to start it and now the motor is locked up. and the antifreeze is very low. could this be a problem with the new sleves that i just installed.
If it won't turn over remove 1 GP at a time and hand crank between each GP removal to find out which cylinder is hydrolocked.
An injector that leaks fuel into the cylinder while sitting can cause a hydrolock. Never heard of a bad cup or badly installed cup causing a hydrolock after 300 miles.
Butt-Head
Joined: Apr 2004
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From: Reed Point, MT
Anything that allows coolant into the combustion chamber could be the problem. The opinions/advice from the internet will give you 25 directions to go.
Yes, a sealing problem on an injector cup could cause it.
Yes, a head gasket could cause it.
Yes, a cracked cylinder wall could cause it.
Yes, a cracked head could cause it.
You get the idea.
Yes, a sealing problem on an injector cup could cause it.
Yes, a head gasket could cause it.
Yes, a cracked cylinder wall could cause it.
Yes, a cracked head could cause it.
You get the idea.
Post Fiend
Joined: Nov 2007
Posts: 9,549
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From: Payson, AZ
What I didn't put in that procedure to find out which cylinder is hydrolocked is to place a clean rag over the GP holes so you can tell what type of fluid comes out. Fuel or coolant or what? Then you need to find out what caused that fluid to leak into cylinder. One step at a time at this point.
Did you use the specified Threadlock 620 retaining compond when you installed the cups?
Did you use the specified Threadlock 620 retaining compond when you installed the cups?
Hotshot
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From: La La Land
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well i will have to wait till this weekend before i can start looking at this thing. really hope its not the injector cups again.
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Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
I take back what I said about "badly installed cups" not causing hydrolock. I had forgotten about the use of improper retaining compound.
I have talked to a couple of people who didn't want to order the proper retaining compound because it was "too expensive".
Believe me, if whoever you get the cups from also supplies the 620 retaining compound order it, you are not paying too much. Do it right, do it once.Edit: Hydrolocking can bend a rod. Think about that.
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yes have already thought about bent rods but i only bumped the starter like 2 3 times.but there is no fuel in the antifreeze and there engine oil is fine also???
the only thing that i can think of is antifreeze is leaking past the cups some how. i have done this install before and never used any sealer compond at all and hade no problems.
the only thing that i can think of is antifreeze is leaking past the cups some how. i have done this install before and never used any sealer compond at all and hade no problems.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
yes have already thought about bent rods but i only bumped the starter like 2 3 times.but there is no fuel in the antifreeze and there engine oil is fine also???
the only thing that i can think of is antifreeze is leaking past the cups some how. i have done this install before and never used any sealer compond at all and hade no problems.
the only thing that i can think of is antifreeze is leaking past the cups some how. i have done this install before and never used any sealer compond at all and hade no problems.
The cups pass through a coolant passage and are surrouned by coolant. The 620 that is applied to the end of the cup is to prevent coolant from getting into the combustion chamber. The 620 applied to the side of the cup is to prevent coolant from getting into the fuel section of the injectors. You may have a coolant leak at the end of a cup or cups.
If you have done this install before without using any sealing compound and had no problems was it to another truck?
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yea it was my buddys 7.3 that i did for him could a injector cup not be seated all the way down maby and with the compression pushed the cup back up causing it to leak around the bottem.
i just going to have to wait till this weekend to start looking in to what happened?
i just going to have to wait till this weekend to start looking in to what happened?
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
yea it was my buddys 7.3 that i did for him could a injector cup not be seated all the way down maby and with the compression pushed the cup back up causing it to leak around the bottem.
i just going to have to wait till this weekend to start looking in to what happened?
i just going to have to wait till this weekend to start looking in to what happened?
If there is a cup not seated all the way you might be able to tell using a straight edge across the top of the injector solenoids. One might be very slighty higher then the other three. Considering the coolant was very low you may have more then one leaking.
Tell your buddy to pay close attention to his coolant level and check it for fuel.
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well finally got the truck fixed again
and the problem was there was old glue in under the injector cup in cly #8 so i pulled all the cups out and replaced the again and this time i found the thredlock 620 and so far i got over 300 miles and no problems.
note to eveyone on here clean out the injector bores VERY well and if ford says use 620 sealer USE IT!!!! hopes this help out some one so they dont have to do injector cups twice in 2 weeks like i hade to do.....
and the problem was there was old glue in under the injector cup in cly #8 so i pulled all the cups out and replaced the again and this time i found the thredlock 620 and so far i got over 300 miles and no problems.
note to eveyone on here clean out the injector bores VERY well and if ford says use 620 sealer USE IT!!!! hopes this help out some one so they dont have to do injector cups twice in 2 weeks like i hade to do.....