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Search Auto Parts Search 1994 GMC Sonoma Coolant leak/Overheat Sign up here!   Email This Post Auto Repair Home>> Truck Repair>> Truck Repair Advice RyRy New User Sep 14, 2011, 12:28 PM Post #1 of 4 (8317 views) 1994 GMC Sonoma Coolant leak/Overheat Sign In 1994 GMC Sonoma 4.3 v6 150k+ http://www.trustmymechanic.com/...ages/tmmgmc262lb.jpg That link is somewhat a picture of my engine, although mine do not look gold I have a stream of coolant leaking from the right side gold indentation you see on that picture. The hole is pin-size and is coming directly from the center of that golden circular indentation.(to the right and a bit lower from the water pump in/outlet). First off I would like to know what those to circular indentations are? I heard of freeze plugs but I thought those were on the sides and maybe rear of the block. Would this be something I could possibly fix? Also, once I have this coolant leak problem fixed, I'm guessing I should probably change the thermostat? Seeing how I changed the water pump myself a few months ago and didn't bother to change the thermostat as well? I'm hoping that was the reason my engine sprung a leak in the first place. Any help in the right direction would be greatly appreciated. Hammer Time Ultimate Carjunky / Moderator Sep 14, 2011, 12:46 PM Post #2 of 4 (8294 views) Re: 1994 GMC Sonoma Coolant leak/Overheat Sign In Those are freeze plugs ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. Discretesignals Ultimate Carjunky / Moderator Sep 14, 2011, 4:57 PM Post #3 of 4 (8276 views) Re: 1994 GMC Sonoma Coolant leak/Overheat Sign In Sure you can fix it. Those are brass freeze plugs in that picture. Yours are probably steel plugs. You just have to drain the coolant and then pop the freeze plug out with a hammer and drift/old screwdriver. Smack the plug at the bottom, so you cause it to swing like a barn door. Then you can pull it out with a pliers or your teeth, if you wish. They have a special freeze plug tool/adapters. You may be able to rent one. Put a little bit of silicone around the new plugs edge and pop it in with the tool. You may need to pull the radiator, so you can get a good swing with your hammer. Removing the plug using a old screw stick or dull chisel/drift Popping new plug in using one of many tools and methods. Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved. Tom Greenleaf Ultimate Carjunky / Moderator Sep 15, 2011, 1:18 PM Post #4 of 4 (8257 views) Re: 1994 GMC Sonoma Coolant leak/Overheat Sign In Love your sense of humor DS. I've used about every known bad word to get some of those out! Back in as I've never owned the tool a socket that matches and a hammer to get the new one(s) in worked for me anyway. Always put that brown gasket cement on them and all worked. Last comment on this is that if one rusted out to expect others to as well in time. Some funky emergency ones can and do work for impossible to get at ones and just need to ask at a real parts store. I've been able in some POS vehicles to put the right size inside the old one as the outer ring of them are not the likely area to fail. Good luck with the fix, Tom   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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