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Discussion Starter · #1 ·
Ok I own a 93 Chevy z71 with the old 5.7 tbi 4 bolt main 350. I was driving it the other day and it started gushing water out the back end. Where the transmission attaches to the motor. There is a weep hole in the transmission bell housing like it was put there for this prob.


I suspect a freeze plug let loose. I have been all through my chilton's book and can't find anything on freeze plug locations. Have any of yall seen this prob before. I am tryin to fig out what it is before I pull it apart.
 

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There are two freeze plugs in the back of the block behind the flywheel. Sorry to hear that but I think you will have to drop the tranny to fix it.
 

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Discussion Starter · #3 ·
Yeah I think I've come to that conclusion also. It just sux cause it is a 4x4and I have to remove the front drive shaft and transfer case. So much for a quick fix.
 

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Old School but still Cool
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Its always those two freeze plugs too. I have had to replace those on older vehicles and its a pain in the ass. Four wheel drive......what can you say.
 

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Yes like others have said, there are 2 plugs there, happened to me on a 305, tranny has to come down for sure, sorry about your luck :(
 

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o damn that sucks. i had one let loose on my boat this year damn near sunk it.
 

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2 stroke thinker
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Well, before you run with the back freeze plugs. . . get a mirror and a good spot light. . .
Check the back of the intake manifold, They were common for wiping out the intake gaskets !
The coolant runs thru the intake into the heads on the corners.
Confirm that before you yank the transfer case and trans. . .
If so, It'll save you a ton of un-necessary labor!
If you have or know someone that has a radiator pressure tester, fill it with water and pressurize the cooling system and you'll have a better idea of where it's coming from.

Keep us posted !

Joe
 

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2 stroke thinker
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Also, I can't remember offhand but, they had a heater hose on the back of the intake manifold that had a "quick disconnect" fitting that was common for rotting out.

Pressure test it! and be sure it's not one of the above before you yank the trans !
 

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Well, before you run with the back freeze plugs. . . get a mirror and a good spot light. . .
Check the back of the intake manifold, They were common for wiping out the intake gaskets !
The coolant runs thru the intake into the heads on the corners.
Confirm that before you yank the transfer case and trans. . .
If so, It'll save you a ton of un-necessary labor!
If you have or know someone that has a radiator pressure tester, fill it with water and pressurize the cooling system and you'll have a better idea of where it's coming from.

Keep us posted !

Joe
This is a very good point Joe :thumbsup:
 

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2 stroke thinker
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Thanks John!
I do this for a living and I want to make sure that all the bases are covered.
about 15+ years ago, a friend ordered a new engine for his Blazer because he was dead set on an engine "rod knock".
Well when he pulled the motor out, he discovered that the "rod knock" was a cracked flywheel resonating thru the motor making it sound like a bad rod. .
Expensive guess for a $50 flywheel!
 

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Honey Badger
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Well, before you run with the back freeze plugs. . . get a mirror and a good spot light. . .
Check the back of the intake manifold, They were common for wiping out the intake gaskets !
The coolant runs thru the intake into the heads on the corners.
Confirm that before you yank the transfer case and trans. . .
If so, It'll save you a ton of un-necessary labor!
If you have or know someone that has a radiator pressure tester, fill it with water and pressurize the cooling system and you'll have a better idea of where it's coming from.

Keep us posted !

Joe
X2 on this. They were notorious for intake leaks in the rear.
 
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