coolant leaking from head stud nut

lincolnlocker · Jul 29, 2014

just took the nut off and coolant is running out of it.. must be bad!!

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Jomax · Jul 29, 2014

lincolnlocker said:
just took the nut off and coolant is running out of it.. must be bad!!

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That sucks! Is this still a pmr motor?

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lincolnlocker · Jul 29, 2014

Jomax said:
That sucks! Is this still a pmr motor?

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No. always been a forged rod motor.

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lincolnlocker · Jul 29, 2014

I dont knkw how tight the studs themselves are supposed to be screwed in but I bent a allen wrench getting it loose.

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psduser1 · Jul 29, 2014

That may be a little to tight, lol.

dsberman94 · Jul 29, 2014

Hopefully it didn't rust into the block. Has it been sitting like this since you first had the problem?

lincolnlocker · Jul 29, 2014

I put the bore scope down in it and as far as I can tell, its weeping above the threads in the block but I can't decide whether its as high as the head gasket or below it.

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lincolnlocker · Jul 29, 2014

dsberman94 said:
Hopefully it didn't rust into the block. Has it been sitting like this since you first had the problem?

its been drove a few times.

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bruce · Jul 29, 2014

supposed to be hand tight until they bottom out then back off 1/2 turn

lincolnlocker · Jul 29, 2014

so is it possible that the neck of the threads could crack it?

im pressurizing the coolant system right now trying to see exactly what leval is leaking. I can see it build up very slowly at tye top of the threads of the block but cant tell any further above that with the bore scope.

possibly a head gasket? I know golfer said cracked block but I would have figured it would have cracked at the threads of the block but its above them... somewhere...

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lincolnlocker · Jul 29, 2014

bruce said:
supposed to be hand tight until they bottom out then back off 1/2 turn

could the lube that was used cure hard enough to sorta lock tite it?

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gman1 · Jul 29, 2014

lincolnlocker said:
could the lube that was used cure hard enough to sorta lock tite it?

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Not supposed to use any lube. It should be bone dry when installing the stud into the block.

lincolnlocker · Jul 29, 2014

gman1 said:
Not supposed to use any lube. It should be bone dry when installing the stud into the block.

ok. dont think it was from the stud then. its either cracked near the top of the block or its a head gasket..

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lincolnlocker · Jul 29, 2014

is this a chunk of head gasket pooched out into the hole?

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lincolnlocker · Jul 29, 2014

yep. im certain it is. I took a video of the bore scope while easing on the air pressure.
http://m.youtube.com/watch?v=6ea9n6ESrwY&feature=youtu.be

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lincolnlocker · Jul 29, 2014

doesnt appear to be blown. did a couple smokey burnouts and did this test.

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TyCorr · Jul 29, 2014

Hmmmm?

I saw the link you sent me. Idk what the hell it is.

Seems that a gasket would be blown or the head is cracked.

Hotrodtractor · Jul 30, 2014

WTF do you have going on there?

It obvious the leak is right there..... pull the head and look. It sure kind of looks like the gasket is smooshed out into the stud hole. Pull the head - if its just a gasket - great - if its a cracked block - then you will know.

lincolnlocker · Jul 30, 2014

Hotrodtractor said:
WTF do you have going on there?

It obvious the leak is right there..... pull the head and look. It sure kind of looks like the gasket is smooshed out into the stud hole. Pull the head - if its just a gasket - great - if its a cracked block - then you will know.

where? the combustion gases in coolant test?

but yes that is the plan.

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IHPowerstroke7.3 · Jul 30, 2014

The device he is using is to figure out if combustion gasses are entering the cooling system. If combustion gas is present in the cooling system, the fluid will change colour.