Question about 2004 Pontiac Montana

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Vehicle heats up very fast and I get no heat out of the dashboard. The upper hose is hot but the lower hose is cold after running the engine and it starts to overheat. When I started it, the belt wa

Don't know where to start to find the problem or what to replace.

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  • 21 Answers

Sounds like the heater coil is going bad. Do you have water leaking into the passenger side floor? If so, then its definitely the heater coil. Depending on the year, make & model check your fuse panel.

Posted on Dec 02, 2014

Testimonial: "no water on the floor."

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

StormStrikes
  • 104 Answers

SOURCE: 1996 grand prix

The only sure fire way to tell if the head gasket is gone is to do a compression test. If you are not familiar with how to do a compression test it would be best to have a friend that does know how to do so or take it to a professional.

From your descriptions, it seems likely that could be the issue as if the head gasket goes, you will run hot if not overheat and it will be difficult for the engine to run and when it does there most definitely be smoke out the exhaust.

Posted on Jan 04, 2009

hi99ins
  • 123 Answers

SOURCE: replaced the heater core. now i cant get good heat

When u put the heater core back either you mixed up the A/c controls with the heater control, or the gate that allows air across you heat ex. is not opening.
Feel the temperature of the water going in and out of the heat ex. (open the hood and feel down by the firewall where the pipes go thru)

If it isnt hot going in there is a valve problem not allowing water to circulate.
If both are hot, then the blower gate isnt opening or the A/c control is confused with the heater control. ( a bit unlikely)
Hope that helps

Posted on Jan 13, 2009

  • 14036 Answers

SOURCE: overheating 2001 pontiac aztek

remove coolant.remove thermostat remove bottom radiator hose to water pump.put a empty container under the radiator.take a water hose put it where thermostat goes flush out the rust in block.watch the water as it come out the water pump .if stream water is small keep flushing until you get a study sream of clear water. also flush out radiator. lower water pressure dont flush radiator it with high water pressure you could burst it. make clean the over flow jug .make sure it not stopped up.put in a new thermostat and radiator pressure cap. fill radiator with half antifreeze and half water.bleed the coolant system.

Posted on Apr 20, 2009

  • 3 Answers

SOURCE: no heat in car ,new coolant ,new thermostat

Had the same problem and turned out to be that the Heater Core was clogged. Took it to a Radiator shop and they blew the system out to unclog it. Cost was $25.00. 2005 Grand Prix.

Posted on Apr 04, 2010

  • 121 Answers

SOURCE: vehicle overheating replaced thermostat gets heat

Air in system, bleed system manually by filling up reserviour then drive until operating temp. Leave vehicle to cool 2hours or so then refill again. repeat until heat is steady and guage stays normal

Posted on Oct 14, 2010

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1 Answer

Upper hose hot lower hose cold has good heat in car not overheating runs fine just lower hose not hot even after tstat opens


The lower hose shouldn't be as hot as the top. If your not having overheat problems I wouldn't worry about it. If the radiator was clogged, it would overheat.

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Vehicle heats up very fast and I get no heat out of the dashboard. The upper hose is hot but the lower hose is cold after running the engine overheats. When I started it, the belt was squealing. Aft


START WITH THE BASICS. CLEAN, FULL 50/50 MIX IN SYSTEM. CHANGE THERMOSTAT. LOOK FOR TRACES OF COOLANT LOSS FROM THE WEEP HOLE IN BOTTOM OF WATER PUMP (USUALLY UNDER PULLEY). WATER PUMP DRIVE BELT OR SERPENTINE BELT MAY NEED TO BE REPLACED. ALSO MAKE SURE RADIATOR CAP IS WORKING PROPERLY.CHECK FOR LEAKS ANT WHERE ELSE IN ENGINE AREA.

Dec 02, 2014 | 2004 Pontiac Montana

1 Answer

1997 Buick LeSabre- the blower turns on but no heat. There is coolant.. and ideas?


is the vehicle having any cooling issues? I.E. overheating? you could have a air pocket and the system needs to be bleed or once vehicle warms up check upper and lower radiator hose to see if one is hot and one is cold they both should be hot if u have proper circulation. did you ever have heat? when did this start do you have any check engine lights

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Maybe your radiator is clogged.

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95 jeep cherokee heat


Both of the hoses at the heater core should be hot. If one is cold the heater core is plugged. You can think of it this way. If the thermostat was stuck closed and you checked the upper and lower radiator hoses with the engine hot the upper hose would be hot and the lower hose would be cool because there is no flow. If you check the hoses with a properly working t-stat both hoses will be hot when the t-stat is open and coolant is flowing. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

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1 Answer

2006 CHEVY COBALT OVERHEATING HAS NEW RADIATOR WATER PUMP AND THERMOSTAT


That is normal, it will not get hot without the thermostat. The water cools in the radiator and falls to the bottom and the bottom hose is cold. This is what cools the engine and stops it from overheating.

Oct 26, 2011 | Cars & Trucks

1 Answer

Temp gauge over heating no heat through vents cold air upper hose very hot lower hose cold changed thermostat flushed radiator no changes


You will need to bleed the air out of the system there should be a bleeder where the top hose connects to the engine

Sep 07, 2011 | 2000 Nissan Quest

2 Answers

Car overheats new radiator 2 t stats diffrent eng new water pump, had same problem with first motor cust cooked first motor filled cooling system with radicat plus overheats sitting in shop heats up real...


Okay sounds like you have a clog within the system, first of all, drain the whole cooling system, run clean water thought the top of the radiator, look to see when the water comes out nice clear, replace the lower hose if you have a petcock close that, refill the top of the radiator, until it is full, start the engine, with engine running turn your heater, let the car warm a little, then reopen the petcock or loosen the lower hose and let the water draw out a little until is pouring out nice and fast, then re-close the petcock and stop the engine.
try and get 40% of the water out, and replace it with 50/50 antifreeze fill to the right point of the cars specs.

Sep 05, 2010 | 2001 Chevrolet Cavalier

1 Answer

2006 pathfinder heater goes from hot to cold the coolant is not low !


This issue may be due to a restricted radiator. The engine heats up but can not flow through the radiator fast enough and pushes the coolant into the overflow until it runs over. Then the engine draws coolant back in showing a low condition.

My suggestion is to check the radiator with an electronic tool for checking temperature. If the temperature is 180 - 200 on the upper hose and 75 - 95 on the lower hose then the radiator needs to be replaced.

A faulty thermostat (stuck open) would not heat up.

A faulty thermostat (stuck closed) would not cool down, but would push coolant out of the overflow tank.

If the vehicle has white smoke (actually steam) coming from the tail pipe, then you most likely have a blown head gasket.

Dec 11, 2009 | 2005 Nissan Pathfinder

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