Question about 2000 Pontiac Grand Am GT

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My 1999 grand am gti is loosing antifreeze coolant into the engine. what can be the problem and is it expensive to fix.

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Head gasket, under $800 bucks, stay away from dealers..... and after this change coolant every two yrs and don't overheat it ....

Posted on Apr 23, 2010

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1 Answer

P0115 code


P0115 is Engine Coolant Temperature Circuit Malfunction
disconnect coolant sensor ,look for antifreeze in connector if yes change coolant sensor and connector terminal
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Mar 25, 2014 | 1999 Pontiac Grand Am GT

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My 99 grand am is over heating i changed the water pump thromstat antifreeze keeps coming out the overflo tank


I had the same problem with my grand am replace the coolant reservoir tank that should fix your issue

Mar 24, 2013 | 1999 Pontiac Grand Am GT

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99 grand prix liquid capacities? coolant and oil


Get the premixed antifreeze inwhich no measuring is involved, just pour it in. if using the old concetrated stuff add 1.6 gallons of coolant then the rest bottled water. Tap water has minerals in it which rot the radiator's core out quicker. The engine oil is 4.5 quarts with filter

May 05, 2012 | 1999 Pontiac Grand Prix

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Why my oldsmobile alero 1999 wont keep water in


CHECK FOR COOLANT LEAKS AROUND THE RADIATOR LOOK DOWN BETWEEN COOLING FANS AND RADIATOR SIDES FOR SIGNS OF ANTIFREEZE.CHECK ALL RADIATORS HOSES AND HEATER HOSES.IF ALL LOOK GOOD CHECK ENGINE OIL FOR COOLANT LEAKS.IF OIL LOOKS LIKE MILK SHAKE COOLANT LEAKING IN CRANK CASE.YOU HAVE A HEAD GASKET LEAK.YOU NEED TO CHANGE OIL + FILTER. GET THE HEAD GASKET FIX.BECAUSE LEAK IN THE CRANK CASE WILL LOCK UP THE ENGINE.IF CRANK CASE OIL LOOKS OKAY.YOU DONT HAVE THE COOLANT CORRECT MIXTURE.YOU SHOULD HAVE 50/50 ANTIFREEZE AND WATER.

Apr 23, 2011 | 1999 Oldsmobile Alero

1 Answer

Loosing antifreeze.. I have a 2005 Dodge Grand Caravan and it is losing antifreeze yet there is not puddles on the ground where I park..


my van was loosing coolant ,the problem was it had a small hole on the upper rad hose the only way I found the hole was when the engine was hot I moved the hose a little bit and the leak showed up.

Mar 01, 2011 | 2005 Dodge Grand Caravan

1 Answer

My Malibu is running hot while still, but when I get going the temperature seems to go back down. I can smell, like a burning antifreeze. Could this be the fan not turning on when standing still?


More likely is you have low coolant levels. If you can smell it, it means it is probably leak somewhere. Check your coolant level. If it is low, I would look under the car for antifreeze somewhere on the engine or engine compartment. Most likely you will just need to replace a loose hose or a hose with a hole in it. It should be an easy and cheap fix.

Oct 21, 2010 | 1999 Chevrolet Malibu

2 Answers

Where is the thermostat sensor


Both the 4.0L and 4.7L engines use 195� thermostats for all model years from 1999-2004. When replacing a thermostat it is very important to install one with the same temperature rating (the only exception might be with certain performance modifications or chips that recommend or require a different temperature thermostat).

4.0L engine - Draining the cooling system WARNING: DO NOT REMOVE THE CYLINDER BLOCK DRAIN PLUGS OR LOOSEN THE RADIATOR DRAINCOCK WITH SYSTEM HOT AND UNDER PRESSURE. SERIOUS BURNS FROM COOLANT CAN OCCUR.

1. DO NOT remove radiator cap first. With engine cold, locate radiator draincock on the right lower side of radiator facing to rear of vehicle.
2. Attach one end of a hose to the draincock. Put the other end into a clean container. Open draincock and drain coolant from radiator. This will empty the coolant reserve/overflow tank. The coolant does not have to be removed from the tank unless the system is being refilled with a fresh mixture. When tank is empty, remove radiator cap and continue draining cooling system. To drain the engine block of coolant, remove the cylinder block drain plug, located on the side of cylinder block below the exhaust manifold.

4.0L engine - refilling the cooling system Coolant recommendations and cautions: The recommended mixture is 50/50 ethylene-glycol and low mineral content water. Never use pure antifreeze. Only Mopar Antifreeze Coolant, 5 Year/100,000 Mile Formula (glycol base coolant with corrosion inhibitors called HOAT) is recommended. This coolant offers the best engine cooling without corrosion when mixed with 50% distilled water. Antifreeze mixture must always be at least 44%, all climates year round. Maximum protection (-90d) is provided with a 68% mixture protection. If the percentage is lower than 44 percent, engine parts may be eroded by cavitation, and cooling system components may be severely damaged by corrosion. CAUTION: Mopar Antifreeze/Coolant, 5 Year/100,000 Mile Formula (MS-9769) may not be mixed with any other type of antifreeze. Mixing of coolants other than specified (non-HOAT or other HOAT), may result in engine damage that may not be covered under the new vehicle warranty, and decreased corrosion protection.

CAUTION: Do not use coolant additives that are claimed to improve engine cooling. 4.0L coolant capacity: 1999-2000: 13.0 qts. (including 2.3 qts. for resevoir) 2001-2004: 15.0 qts. (including 1 qt. for resevoir)

1. Tighten the radiator draincock and the cylinder block drain plug(s) (if removed).
2. Fill system using a 50/50 mixture of ethyleneglycol antifreeze and low mineral content water. Fill radiator to top and install radiator cap. Add sufficient coolant to the reserve/overflow tank to raise level to FULL mark.
3. With heater control unit in the HEAT position, operate engine with radiator cap in place.
4. After engine has reached normal operating temperature, shut engine off and allow it to cool. When engine is cooling down, coolant will be drawn into the radiator from the reserve/overflow tank.
5. Add coolant to reserve/overflow tank as necessary. Only add coolant to the reserve/overflow tank when the engine is cold. Coolant level in a warm engine will be higher due to thermal expansion. To purge the cooling system of all air, this heat up/cool down cycle (adding coolant to cold engine) must be performed three times. Add necessary coolant to raise tank level to the FULL mark after each cool down period.

For more details, you can refer to the Jeep WJ Service Manual Section-07-Cooling-System-Ewj7

Hope helped.

Nov 02, 2009 | 1999 Jeep Grand Cherokee

2 Answers

I have a 1999 jimmy with 115,000 miles and I,m hearing about the intake manifolds leaking antifreeze what concerns should i have with my jimmy and what type of antifreeze should I be using


A leaking manifold could cost you a VERY expensive repair. I recommend getting it fixed as soon as you can. And with the antifreeze...seeing how it it a GM it should take DEX-COOL. But look under the hood and look for a white sticker and it should say "This vehicle takes DEX-COOL coolant. Do not mix with any other coolant" and if not the cap for the coolant should say so. If so, then obviously you need DEX-COOL or universal coolant. Universal will not harm anything, but I would use the manufacters reccommendations just on the safe side.

Oct 19, 2009 | 1999 GMC Jimmy

3 Answers

Engine oil in antifreeze


you have either cracked the block cracked the heads or taken out the headgaskets. this can be an expensive fix to do it right you will need to rebuild or replace the engine.

May 21, 2009 | 1999 Saturn SL

2 Answers

1999 Gr Jeep Cherokee-antifreeze issue


how often does the warning comes on doing the week or in two weeks? if it was a one time thing or this takes place every 3-5 months i wouldn't worry about it. i will make sure that the radiator cap is on tight. you said that all hose seem to be in good condition i would check the radiator where the cooling fan covers the fins and the water pump because it has a warn hole at the base that will seep out antifreeze when the inside seals are going bad these will cause the smell also.

Mar 19, 2009 | 1999 Jeep Grand Cherokee

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