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I have a 93 Chevy Suburban runs great, but I.

Tiny
DELTOROGENO
  • MEMBER
  • 1993 CHEVROLET SUBURBAN
  • 130,000 MILES
I have a 93 chevy suburban runs great, but I replaced the heater core, and drained the radiator, I also replaced the thermostat, but by the oil filter thers too little lines that leak antifreeze, and I don't know why it leaks, please help.
Saturday, January 19th, 2013 AT 7:41 PM

12 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Those should be oil cooler lines. They should not be leaking coolant.

Are you sure it is coolant?

Roy
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Saturday, January 19th, 2013 AT 7:46 PM
Tiny
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Ok yes I'm sure its coolant, its green, I just drained the radiator last night and replaced the antifreeze
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Saturday, January 19th, 2013 AT 7:51 PM
Tiny
ASEMASTER6371
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What motor?

Roy
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Saturday, January 19th, 2013 AT 7:52 PM
Tiny
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Do you have a rear heater unit?

Roy
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Saturday, January 19th, 2013 AT 7:55 PM
Tiny
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Here's a picture
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Saturday, January 19th, 2013 AT 7:56 PM
Tiny
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Its a 350 small block and yes iit has rear heating
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Saturday, January 19th, 2013 AT 7:57 PM
Tiny
ASEMASTER6371
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Those are the oil cooler lines. The coolant is coming from above and dripping onto the lines. The freeze plug above it does not look too good.

Roy
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Saturday, January 19th, 2013 AT 7:59 PM
Tiny
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Ok, how do I replace the freeze plug?
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Saturday, January 19th, 2013 AT 8:05 PM
Tiny
ASEMASTER6371
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If that is the issue, drain all the coolant, knock the plug in and then remove with pliers and install the new one. Make sure it is not the intake manifold from the top. Get it pressure tested to be sure

Roy
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Saturday, January 19th, 2013 AT 8:07 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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I agree with ASE, those are oil cooler lines. You can see where it is wet above the oil filter and running down. A freeze plug isn't hard to replace. The problem is if you have the room to work. Basically you need to pry out the old one and tap a new one in place.
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Saturday, January 19th, 2013 AT 8:08 PM
Tiny
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Ok, the freeze plug is on the engine block right?
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Saturday, January 19th, 2013 AT 8:14 PM
Tiny
JACOBANDNICKOLAS
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Yes, the freeze plugs are in the engine block. See pic
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Sunday, January 20th, 2013 AT 2:53 AM

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