Question about 1998 Chevrolet Suburban

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It sees like my radiator and cooling system is not circulating correctly. Someone suggested that it maybe my thermostat, it also seems like I may have a pin hole leak in the pipe that runs from the radiator on the top right hand side as you face it. My question is could it be my thermostat and can I fix the leak with a liquid fix-it?

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That fix it messes up cooling have a coolant pressure test done.also if you have good heat usually the tsata is not stuck,look and see if water pump is leaking

Posted on Sep 09, 2010


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Recently had a new water pump fitted to my jeep Cherokee but it's still overheating and the heater in the car doesn't work. Any idea what might be causing this

if no leaks in hoses, then flush out the radiator etc, there maybe a plug up in system. also change thermostat. God-Bless! and hope this helps you.

Apr 24, 2016 | Jeep Cars & Trucks

1 Answer

Fixed every possible cause but still overheating

checked water pump for circulating the coolant?
checked the radiator if the coolant circulated correctly?
thermostat renewed?
thermo switch checked whether is working?
fan switch checked whether is working?
checked whether the matrix could circulate the coolant?
ckecked whether there is any valve on the matrix hoses and is working?
have you bled the cooling system ?
have you checked whether you have a cylinder head gasket with problem and pressurized the water?
checked whether have a cracked cylinder head and on accelaration expanded the water hoses?
have you checked whether the radiator cap is working ok?
have you checked whether the radiator cap is with the correct pressure for the cooling system?
checked whether the cooling fan is working?

Sep 05, 2012 | 2001 Mazda Protege

2 Answers

I own a Volvo V40 Auto (year 2000) The heater fan is working but no hot air comes out although I've just tried it again and now seems to be O.K so the problem seems to be intermittent. I would be very...

might need to bleed heating system / radiator. Air lock could stop flow of hot water. Check water colour in radiator - if brown and gungy there could be a build up of sludge so radiator flush required.
when dial / lever moved to turn heat on / off see if you can hear anything moving - there should be! Quite often when heater turned on or off small solid wires move valves that are visible under dash and on engine bay firewall. Watch these rods when someone is turning the heater from cold to hot and see if anything is sticking or loose

Mar 01, 2011 | 2000 Volvo V40

1 Answer

Problem is with temperature control. Even on a very cold day the needle goes up to the top and red light comes on. Had the car to the dealer and he replaced cross-over pipes, thermostat, and and ...

It may be anything. The good news is that if the cylinder head gasket is blownup, then the temperature goes up and never comes down. If you wil not correct the coolant temperature soon, a bloun gasket will complicate the situation. Sounds like a poor circulation from engine to radiator. The cooling process of a car involves:
1 - The heat generator - ENGINE
2 - The cooling device RADIATOR.
Coolant transfer the heat from Engine to the Radiator. From the radiator the sream of air absorb the heat from the radiator and the engine cools down. If the system has no leak, there are twoo factors that affect cooling.
1- Circulation of coolant from Engine to the Radiator.
2 - Circulation of the air through the radiator.
You have to make that you have a good circulation from engine to radiator.
The cause might be:
A bad water, pump, thermostat, or AIR POCKETS in the cooling system.
To check and normalize this you have to:
Rise up the front of engine on oil change ramps.
Top the cooling system with coolant 50/50.
Open the bleedin nipple of cooling system, and add coolant till you see coolant of the blleding nipple.
Start the engine and open the ait blleding screw. If you will se a stream of coolant going up, then you have two good news. No air pockets in the cooling system, and a good water pump. geea start leaking.
Do not run engine for more than 5 minutes. Stop the engine.
The next day with cool endine repeat again the same process.
Make sure that Radiator is free from debris. It is a good idea to clean it up. A water hose can help.

Nov 01, 2010 | 2002 Oldsmobile Intrigue

1 Answer

I have a 1995 Pontiac Grand Prix GTP 3.4L DOHC....... The engine is over heating (yes it has coolant in it).... and I had noticed a leak in the coolant so we replaced the radiator (which had a hole in it)...

Maybe a backflushing of the cooling system can help to make it cool more efficiently.

Sediment can build up in the cooling system causing a lack of flow of coolant.

Also, the thermostat could be stuck closed, as others have suggested.

Sep 01, 2010 | 1995 Pontiac Grand Prix

1 Answer

Engine overheating-----1994 Olds Cutlass Supreme 3.4 liter v/6

There seems to be an air pocket or no antifreeze in engine block. Try this method disconnect upper radiator hose and pour water directly into hose down into engine block until it full. when its filled reconnect hose and fill up radiator. as the vehicle warms up open bleeder valve on the thermostat housing and release air from system. open slowly and BE VERY CAREFUL WATER WILL BE HOT, bleed until you get a steady stream opening and cosing valve. However if all of this don't work. You may have a bad pump. Good Luck

Dec 27, 2008 | 1994 Oldsmobile Cutlass Supreme

1 Answer


Well, assuming that the water pump is turning the correct way, looks like you are going to have to pull the radiator out & take it to a guy who cleans radiator interiors. Seems to me that you may have some sediment built up and the water is not circulating thru the rad. This would explain why the top is warm & the bottom cool with no thermostat. Whilst the rad is out, flush the block with water. See what comes out. Don't use a "flush kit" just yet. In my experience, the flush kits that you buy are not good for this issue, have it done by a pro, but, after he cleans it, then get a flush kit & flush the block anyway. If there is sediment in the radiator (from sitting), there is def sediment in the block.

The timing would have to be WAY OFF to make it overheat.

Sep 17, 2008 | 1984 Jeep CJ7

1 Answer

2004 dodge ram is over heating, the thermostat and fan clutch have been replaced.Doesn't(over heat) in cool weather,but will in mod. weather if driven over 70mph or hilly terrain due or increase of rpm,and...

Water pumps can stall out, but do you have air trapped in system.
Had you recently had the system "open" to replace hose, thermostat, temp sensor. Some Ford and GM have a bleeder screw on a high point in cooling system to bleed out trapped air.

Check your trans fluid color. Since the trans cooler is built into radiator (automatics)

IF the engine is overheating the trans CAN overheat
IF the trans is overheating the engine CAN overheat

They share the same cooling source and trans fluid gets hotter than oil, but yet it has a wimpy cooler built into radiator. Maybe add trans oil cooler to system.

Also outside temp affects the cool down rate of the radiator, air trying to cool down hot radiator/engine is less effecting than cool air cooling hot radiator/engine

Aug 06, 2008 | Dodge Pickup Cars & Trucks

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