Engine Help! Coolant Leak 89 Mustang GT. Video of leak on youtube. Head Gasket?

pitchdw2

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Jan 29, 2021
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I have a 1989 Mustang GT and I'm trying to identify if my coolant leak is coming from the head gasket, cracked engine block or is there something else that it could be. It's literally pouring out of the back of the engine near the exhaust headers. Do you think it's a head gasket?


Link to leak View: https://youtu.be/ORQjgztU6fw
 
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RaggedGT

check back later..
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Which side of the block is it on? Few things could be going on-blown out freeze plug, busted heater hose, or even a lifted cylinder head ,intake etc. Probably wouldn’t hurt to get a pressure tester and mirror to see what you can see before you start pulling it apart
 

nickyb

WAIT,you now have a pair?
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That's a huge as* leak. If the head lifted or gasket blew then youll have water in the cylinder and oil.pull plugs , check oil.
 

pitchdw2

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Jan 29, 2021
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I have better pictures of the leak.
 

Attachments

  • Leakcloseupfinal.PNG
    Leakcloseupfinal.PNG
    2.4 MB · Views: 49
  • Leakoverviewfinal.PNG
    Leakoverviewfinal.PNG
    5.1 MB · Views: 49

pitchdw2

New Member
Jan 29, 2021
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That's a huge as* leak. If the head lifted or gasket blew then youll have water in the cylinder and oil.pull plugs , check oil.
I checked the plugs the look good and no water coolant in the oil. I uploaded better pictures of the leak.
 

nickyb

WAIT,you now have a pair?
10 Year Member
Apr 3, 2009
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Check above at the back of intake , it might be running down to were you see it leaking. If not and it's coming from the head then you know what.
 

KRUISR

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Apr 16, 2015
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Could it be the freeze plug on the back of the head?

gt40bars.jpg
 
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90sickfox

Wasn't a pretty sight...and I've got big hands
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Mar 2, 2015
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AFR 165 don't have freeze plugs...I don't think. The lower back corners of the lower intake could leak coolant past the gasket. There are freeze plugs under the headers on both sides of the block. There's also on in the back of the engine between the engine and transmission. The lower head bolts go into coolant ports. If one of those loosened up it could leak coolant.

Keep us posted.
 

Cheapskate207

The left one hangs a little lower
Jan 12, 2020
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I would use a pressure tester to see if you can see where it’s coming from. I would also use a “block tester” for checking for combustion gasses in the cooling system (head gasket). Both of these can be rented at most auto parts stores.
 

mikestang63

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Aug 27, 2012
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get a cheap $20 dye kit from flea bay or Amazone. Put a small amount of the green dye in the coolant and let the engine run then put on the glasses and you will see where the leak is.