1996 Chevy Blazer over heating and coolant leak

KORSBURN

MEMBER
1996 CHEVROLET BLAZER
6 CYL
4WD
AUTOMATIC
16,300 MILES

My blazer started over heating for a while but I would drive it for about 20 min and it would cool back off. I checked the coolant and would have to add it occasionally. Once every two or three weeks. Just recently it over heated and never cooled back off. I stopped and checked the coolant levels added a whole gallon and it stayed cool for about 30 min. Then over heated again. There are no visible leaks and I already changed the thermostat. I can smell something sweet like syrup when it starts to over heat. And the last time it overheated it started pouring radiator fluid every where but I cant tell where it came from and it may of even been the overflow.

1 Reply

HARE_I_AM

MEMBER
3 POSTS

Have you checked the pressure in your system? When your engine is overheating you may either be boiling off coolent or leaking it out or both. You may also be getting coolent in your oil and you can check that by simply examining your dipstick. You'll know if there's coolent in your oil if it's thinned out and discolored. Also check a few different places such as radiator hoses, heater hoses to the heater core, radiator plug, coolent sensor, intake manifold seal, head gaskets, and even an engine plug. The dex-cool thats recommended to use in the gm engines will also build up sludge in your cooling system when you add water causing a blockadge. It can be cleared using a flush but at the same time the buildup can be so bad that it can also woresen your problem by moving a 'clump of sludge' somewhere it can't move through and then you'll defintly have to start taking off parts. Good luck!