Question about 1991 GMC Sonoma

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I have no heat. I have replaced the thermostat and gasket plus I have replaced the water pump. The anti freeze seems to be circulating.

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It sounds like the coolant is not circulating through the heater radiator. You may have a blocked heater hose but I suspect that the control wire/cable that goes from the heater control lever has broken or become disconnected from the heater tap that controls the volume of hot water through the heater radiator. Some times there is also a flap in the air ducts that is operated by the heater lever that varies the amount of air that is heated. The tap is usually in the engine bay or may be tucked in behind the air ducting. On some models the controls are operated by very small vacuum lines and the rubber hoses can become hard and not seal fully on the the pipes. If this is the case, check the places where the hoses connect to the control or the actuators.

Posted on Nov 07, 2010

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Posted on Jan 02, 2017

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Water boiling out of water bottle


don`t sound good, but i would see if water was circulating in radiator when warm,and check if fan comes on like it is supposed to to cool it ,if water does not circulate check hoses to make sure the suction does not restrict flow ,if no circulation you could try replacing thermostat (cheapest fix ) anti-freeze dilution (second cheapest ) or uh-oh maybe blown head gasket......

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Will a broken water pump cause anti freeze to mix with oil and drip


Yes, your water pump attaches to the front of the engine block. If a leak opens up between the two, coolant goes into the crankcase along with oil. That means water and oil are being circulated through the bearings and cylinders of your engine. Don't drive it in this condition.

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Hey Tyler,

Your posting does not indicate if you have a good clean mixture of antifreeze coolant in your heat & cool exchanger ( ie. radiator ), this valuable component of the vehicle coolant & heating system alway's need's a good supply of 50% water to 50% antifreeze which is under pressure and could hurt you or anyone standing too close to your vehice in question.

Purchase the anti-freeze in either full mixture (100%) or 50% water 50% anti-freeze just about anywhere out there with a vehicle repair isle.
Personally speaking I mix 50% water 50% anti-freeze since this is much cheaper than buying the already 50% water to 50% anti-freeze simply due to economic reasons.
After filling this radiator container, remember to alway's follow your vehicle manufacture's safety guidelines, remember there are many moving parts in the engine compartment that could hurt you or people standing around your vehicle while the engine is running.

Hope this helps!

Oct 22, 2013 | Pontiac Cars & Trucks

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Not circulating


While engine is cold remove radiator cap and start engine. If you have a water thermometer insert it so you will know when your at running temperature, sometimes a meat thermometer will work. At running temperature you should see the water circulating in the radiator. Remember that low water is the main reason for overheating. You should add anti-freeze or a 50/50 solution. Water should be about one inch above the coils. If water isn't low check the fan belt, or electric cooling fan, it should come on as soon as the car begins to over heat. Now check the hoses they may be soft and collapsing when hot. The water pump usually leaks out the bottom when it go's out or the shaft becomes wobbly (you'll need to loosen the fan belt to check this). If you have to pull the thermostat don't bother checking it in boiling water just replace it with a new gasket, and remember the coils on the thermostat always go's in the block or manifold. Check for oil in water this could mean a bad head gasket which will also cause overheating.

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I have a mitsubishi space wagon (not galant but the space wagon didnt come up as an option)1997cc, 1993 automatic petrol. It has had a new radiator, new thermostat and new head gasket fitted but is still...


It sounds like the water pump belt under the timing belt is broken or the pump is not circulating the anti freeze the way it is supposed to.Did you replace the water pump, water pump belt, and timing belt when you replaced the head gasket? If a vehicle is over 100,000 miles it is recommended to replace the water pump while doing the timing belt just because the pump is such a pain to get to under the timing belt.

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My 86 toyota mr2 over heats about 10 minutes into running it. the anti-freeze leaks out from around the head gasket but the oil and the anti-freeze isn't mixed together. i'm not sure if i should replace...


Best bet is the gasket. After removing the head have it serviced professionally, replace thermostat and water pump and timing belt while in there

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1990 bmw 525i overheating ..


No such pump! Make sure you have anti-freeze in the radiator. It circulates better than just water, because water boils and turns to steam (goes UP) proper antifreeze helps it not have pockets of steam/air.

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