Question about Pontiac Montana

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Coolant leaking from hose back engine

My pontiac montana leaks antifreeze when on and also leaks when its off is there anyone that can help me?

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  • 259 Answers

Need to change what sounds like a heater hose, available at parts store with new clamps. You just need screwdriver, pair of pliers, and more antifreeze coolant to top it off after replacement!

Posted on Oct 10, 2013

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Posted on Jan 02, 2017

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SOURCE: 2003 Pontiac Montana antifreeze smell?

Bad News. I recently had the same type of smell ( no leaks or puddles either) coming from my van and had to have the intake manifold gasket replaced due to the Dex-cool issue. It appears GM installed an inadequate/substandard gasket when they built the van. My van only had 65,000 miles on it. There's a Dex-cool settlement you could have applied for but repairs had to be made by May of 2008.

This is the only real complaint I've had with the van.

Posted on Dec 09, 2008

  • 142 Answers

SOURCE: 1996 Jeep cherokee, leaking coolant when cold/ hot ok.

waterpump houseing/shaft seal is on the way out hence the water/coolant, running along the block. when hot the seal does so, when cold and depressurising seal doesnt.

Posted on Jan 25, 2009

MrScary66613
  • 1990 Answers

SOURCE: 2000 Pontiac Grand Am - Coolant Leakage

You will need to Replace this Hose to Stop this Leak. There is nothing that you can put on it to stop the Leak Because the Hoses are Under Pressure. Please Rate My Response! Thanks!

Posted on Jan 31, 2009

  • 118 Answers

SOURCE: How to remove heater core from 2000 Pontiac

Wow I hope youre mechanicly inclined, big job the entire dash & carrier have to come out 7-15 hr job if you know what you are doing to much to list hear I would check heater hoses at fire wall first make sure they arnt leaking. I wish you well

Posted on Aug 31, 2009

  • 23 Answers

SOURCE: leaking coolant from rear of engine is there a

No, that would probably be a freeze plug on the back of the block if the coolant is coming out between transmission bell housing and engine.

Posted on Jan 18, 2010

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1 Answer

My 2001 Pontiac Montana is leaking coolant. It's dripping down between the oil drain plug and the transaxle fluid pan. I can't see where exactly it is coming from. I've checked the water pump, radiato


Any where back there is a head gasket leak, unless it is at the very front of the engine(passenger side). Then it could be the timing chain cover. Use a mirror and bright light, You can find it.

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94 pontiac sunbird le 2.0 4cyl leaking coolant


If you are able to lift the vehicle safely onto jack stands, you may be able to get under. With the coolant topped off, and using a flash light, you may be able to determine where the hose goes. Most likely the hose clamp rusted and broke off.
You can also pressure test the coolant system which will tell you where the coolant is leaking from

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2005 pontiac sv6 oil or antifreeze leaking on serpentine belt and spraying onto hood.


Check the seap hole at the bottom of the water pump for a leak. If that's where the leak is coming from the water pump will need to be replaced. Otherwise check all hoses and fittings for a leak.

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2 Answers

Overheating pontiac montana shooting out cold air from heater


Get the radiator and heater core, hoses and thermostat replaced. Also replace the mixing valve if needed. A radiator shop could give you an estimate and diagnose the problem better than I can online. I hope sincerly that this helps.

Mar 16, 2011 | 2003 Pontiac Montana

5 Answers

Why does my 2000 pontiac grand am leak coolant


coolant leaking could come from different areas, i would 1st start checking for leaks around the thermostat area, this is normally where the top radiator hose connects too, then i would look at the water pump area to see if any coolant is visable on the outside of it, also check your heater hoses for leaks too, some cars have even had antifreeze leaks coming from the freeze plugs, which are installed into the engines block, they are normally on the sides of the engines. don't forget to check out the radiator, a good way to find antifreze leaks is after you drive the car for a while, and then park it, and then put a large piece of cardboard under your car, make it large enough to go from the radiator to at least the windshield area, if it leaks then, you will be able to see what area the antifreeze has leaked.

Feb 16, 2011 | 2000 Pontiac Grand Am GT

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Leaking anti freeze. Replaced the intake gasket. Antifreeze going down but can not find a leak. No antifreeze in the oil. Someone said it could be the timing cover. But I do not see any leak. Loosing 2...


It could be the water pump. They will leak and sling the coolant so it doesn't get to the ground. You can't see the leak because it's hidden under the pulley. It's called the weap hole in the pump.

Jan 23, 2011 | 2000 Pontiac Montana

1 Answer

Leaking antifreeze


There can be a lot of places where the coolant will leak,but check the intake gasket,look for coolant in the oil also.

Oct 12, 2010 | 2002 Pontiac Montana

2 Answers

2003 ponitac montana... Not holding


need to perform a coolant pressure test. fill the reservoir and after the engine cools down fill the radiator, next start the engine and wait till the coolant system builds pressure then turn off the engine and using a mirror and flash light look for a leak.check water pump, hoses,radiator tanks for cracks,intake gasket at the corners espesically at the back next to the trans.also pull the carpet back and check for coolant leaking from the heater core,and last remove the sparkplugs and check for leaking head gaskets.hope this helped.

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