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Old 11-25-2011, 05:45 PM
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Default Coolant Leak 1996 Suburban

3 days ago I had the hose to my heater core replaced because it was leaking coolant. The next day I had the two front engine mounts replaced because they broke. The same day I got the engine mounts fixed, I noticed a lot of coolant on my driveway underneath my car. After taking a look, the repair to the heater core seems to be fine. The coolant is actually leaking from somewhere I can't see right above the coolant hose attached to the bottom of the front of the block. All hoses and clamps in the coolant system are secure. Am I looking at replacing a freeze plug? Or are there any other ideas out there? Any help is appreciated.
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Old 11-25-2011, 11:44 PM
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Location: KC, MO area
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My first guess would be the water pump front seal. It usually goes when the bearings start to fail.
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Old 12-18-2011, 01:08 AM
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Water pump may be one problem, I have had that problem with my 97 tahoe, then after replacing the pump, some months later, I had to pull the intake manafold off and reseal it. Chevy small block offen have coolant leaks from the intake manafold.
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Old 02-05-2012, 09:48 PM
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Default 1994 suburban 350 catastrophic coolant failure!

so i got stuck in about 4 feet of snow out in the middle of wyoming friday night and had to spend the night, i tried to keep it running as much as possible but i didnt have enough fuel. when i finally got it pulled out the next day it was running fine till i started to get on it. i had a leak out of my lower radiator hose. my thermostat had gone out. i replaced the thermostat, the coolant, and the hose and it ran just fine heat worked thermostat opened and everything without problems i drove it again tonight and it ran well untill i steped on it and when i looked behind me there was a large cloud of smoke, i pulled over and it was steaming (not overheated) and it was gushing my brand new coolant onto the ground. upon further inspection i noticed it was coming out from the block underneath the exhaust manifold and behind the engine mount. what could it be? freeze plug? i didnt hear a bang so i dont think im missing part of my block or anything but im completely stumped. i removed the tire and fenderwell and im in the process of taking the exhaust manifold off tomorow and trying to figure out why this is being such a pain.
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Old 02-06-2012, 10:49 PM
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I'd check the water pump weep hole.
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