The overheating probably came from the coolant being too low. The coolant in the reservoir won't go back into the radiator if the coolant in the radiator is too low. Until you get it fixed, check and fill up the radiator every time you want to use it. Overheating is very bad for engines and can cause expensive engine repairs.
Where is it leaking, from the engine or the radiator? You didn't say, but wherever it is leaking is the place to start. If at the radiator, and it is not a loose or leaking hose, I would be looking for a new radiator. If it is leaking at the front of the engine and dripping down from there, you could have a bad water pump. This could be an expensive repair at a shop-not the pump itself-they are not too expensive-but the labor cost in replacing a water pump will add up.
The thermostat would not cause it to leak. But when all is said and done, you will want a new thermostat, after the leak is fixed. They are very cheap and it is just good insurance.
I traced the leak to the radiator. When I had the radiator changed there was a crack on it, so I figured that's where the leak was. Now it doesn't leak and the engine is being cooled properly. Thank you
Good going. I'm glad you got it.
Thanks I figured it out and fixed the constant drip
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SOURCE: ATF is leaking out of the flywheel assy of my 99 Suburban 1500
if it is ATF then it is the trans pump or input shaft seal, these both require the removal of the transmission.
If it is coolant it may be a rear freeze plug, but this is rare and also requires the removal of the transmission
A more likley cause is a leaky intake manifold which is very common on the vortec v8 engines, it leaks at the very back and runs down the bell housing. this repair is a bit extensive but can be accomplished by a good DIYer given time, space and tools this repair is also the least expensive of the three, about $300
SOURCE: 1999 GMC Jimmy Running Hot w/ Engine coolant reservoir empty
Hi
The problem is most likely 90% head gaskets but could be intake manifold gasket leaking too. Intake gasket has to be checked when intake is removed. Might find problem there if not continue and remove heads. Bars Leak will not work.
SOURCE: 96 GMC Suburban Started to overheat last summer.
Check the oil filler cap for mayonaise. It may mean that your head gasket has gone, Go to a local garage and ask them to do a presure test on each cylinder to see if it fails on one. Have you checked the plugs for cleanness and oil contamination? that's where your problems sounds where it lies.
SOURCE: 1989 Chevy Suburban keeps overheating...have
try to see if ur heater core is pluged up sumtimes that can cause ur car to over heat. hope this helps
Testimonial: "Never thought of core being plugged...Thank you"
SOURCE: I have a 1999 GMC
yes a beginner can just follow the top rad. hose to the block use a 10mm socket to take the 2 bolts out. scrape the old gasket away put new gasket and high temp silcone on gasket and install new thermostat.
doesnt sound like the problem to me, check the oil make sure no water is in it, sounds like the head is cracked on the exhaust side and ur water is going out your tailpipe, so in turn would ruin your cat converter and make the truck run raggy
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