Question about 1999 GMC Jimmy

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Engine is pouring antifreeze all over the ground and over heats?

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  • Master
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Start the vehicle. Check the radiator, hoses, and water pump for leaks. Look at the location of the leak. Is it under the radiator or further back under the water pump? If coolant is leaking from vent or "weep" hole on the water pump, then the pump is defective. If you can find no leaks, then it is most likely a faulty thermostat. Hope this helped and best wishes.

Posted on Aug 05, 2009

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  • GMC Master
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It could be coming from a few places. First to check would be your hoses ,upper and lower to the rad from the engine and your heater hoses, 2 that go to the firewall. Check your radiator for wet on the inside and outside and make sure the cap is on properly and tight. With the rad full look under the water pump, it's behind the fan and see if water is dripping out from the bottom of it. There are 3 frost plugs on each side of your engine about half way up from the oil pan that could leak. If you can't find your leak,start the engine and let it idle and warm up and check these again,it should show up as the rad builds pressure. Be very careful about driving it any distance until you get it repaired. Take water withyou and top it up as soon as it starts to overheat. I wouldn't bother with anti-freeze until you get it repaired. If you are a little bit handy with tools these are all diy repairs. Hope this helps.

Posted on Aug 05, 2009

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Posted on Jan 02, 2017

Anonymous

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SOURCE: pouring out antifreeze, car is not over heating

At a local parts store, purchase a coolant system pressure tester. DO NOT pressure the system while the engine is hot. The pressure tester will attach to your radiator fill cap where you can pressurize your system, exposing any leaks. Any local mechanic should perform this test free as well.

Posted on Jun 09, 2009

wtdash

  • 605 Answers

SOURCE: loosing antifreeze daily

Not clear...you DO or DO NOT have wet carpets? If yes, do they smell like antifreeze? Are you windows fogging up easier than normal? If so, the heater core (Heat/Defrost/AC) is bad and needs replaced.

Does it overheat? If no, then just get the radiator replaced.

Good Luck, TD

Posted on Apr 08, 2010

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1 Answer

My 2005 Buick terrazza has barely any heat at all. Tries to throw a little warmth while my engine is running at half temp sometimes just over! What do I do? Was told by the dealership in parts and sai


drain radiator of antifreeze then add some caustic soda about 200 grms dissolved in a bucket of warm water ,pour this into the rad top up with water and leave engine on idle for half hour ,drain -flush and run engine and see if its any warmer ,if it is the drain water again and give a good flush then refill system with 50% antifreeze

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You may need to "burp" the system and get the air out. When car has completely cooled, take radiator a off, start car, let it warm up (but not overheat) and see if level drops. Add coolant/water mix to top it off. Never run straight antifreeze. At most a 50/50 mix of distilled water and antifreeze.
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I HAVE REPLACED NEW THERMASTAT AND NEW WATER PUMP, BUT STILL NO HEAT.WHAT ELSE CAN BE MY PROBLEM ? THIS IS A1995 FORD WINDSTAR VAN.


Maybe you didn't bleed all of the air out of your coolant systtem.
I had a very similar problem, last month, my heat would not go above 50 degrees F.

I had air in my heater core.

I put wheel blocks behind the back tires and engaged the emergancy brake.
I jacked the front of my van up so both tires were off the ground (about 3")
I removed the radiator cap, started the engine, and turned the heat on high.
I added antifreeze, until it was full.
I let the engine continue to run, as I watched the antifreeze level go back down, then I added more antifreeze.
After doing this 2 times, I squeezed and held the upper radiator hose. I did not release it.
I started pouring more antifreeze in and when it started to over-flow, I still kept pouring as slowly released the hose.
With the raditator level full, I replaced the cap and put some antifreeze in the coolant reservoir.
Lowered the front back to the ground and removed the tire blocks.
I stuck a guage in the inside vent and I now get a 125 degree reading.

Note...after I got the van jacked up, it only took me 15 minutes to get the air out of the system (mainly, because I squeezed and held the hose).

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I would suspect the thermostat has stuck closed. Drain the system, heater on hot, flush the system, replace the thermostat, pour in pure water and see if that cures the problem. If it does then drain the system again and pour in a 50/50 mx of antifreeze and distilled water. You also need to make sure the cooling fan is working and the water pump is circulating coolant in the system.

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I just flushed my radiator and bought two gallons of antifreeze. I have a 1998 GMC Sierra 2500 4X4 454 7.4 L. How and how much antifreeze/water do i put it. I have no owners manuel.


the final ratio is half water and half antifreeze, since the engine will have water left after the flush add antifreeze first thenwater and check it with a hydrometer or tester

Oct 22, 2010 | 1998 GMC Sierra

2 Answers

Loosing antifreeze daily


It can cause problem to engine if it isn't cooling it good enough, but personally I would really just take it to your automotive mechanic. It might just be a simple fix to replace radiator, but I would consult a professional mechanic.

Apr 08, 2010 | 1995 Chevrolet Corsica

1 Answer

Pouring out antifreeze, car is not over heating


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Jun 09, 2009 | 1997 Cadillac Seville

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