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My 2004 Monte Carlo leaks coolant just under the spark plugs when every i give gas while the car is in park

The water pump is connected just under the the hearder butb with the car in park and running it leaks coolant just under the spark plugs . I keep having to put coolant in the car to cool it off where could the leak be coming from off the engine

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  • Chevrolet Master
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You need to have a repair shop pressure test the cooling system with a special tool to isolate the location of the leakage.

Posted on Oct 31, 2012

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6 Suggested Answers

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Posted on Jan 02, 2017

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sleepygsx
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SOURCE: Car is leaking antifreeze from underneath of car

watch for leaks and follow them after you drive i would geuss checking your thermostate housing both parts, the hoses that go to the heater core by the throttle body and the hose that goes to the throttle body, im guessing this is the turbo, if it is a non turbo it would be a hoses the waterpump or the oring that goes into the waterpipe on the front of the block, just get in there and take a good luck and remember the rules of gravity =) good luck man and if you need any parts for it let me know we got alot of these parts cars out in our yard

Posted on Sep 11, 2008

  • 5 Answers

SOURCE: 1998 monte carlo coolant

I just did a lower intake reseal on my 98 monte's 3100, it's not tough to do, the biggest part is paying attention to what pushrod came from what position and ensuring they go back to where they came from, not only for wear patterns, but for different lengths on the intake and exhaust push-rods.

I work for a GM dealer in northwest montana, and I can say it's not cheap labor-wise, generally around 6 hours of labor and around 300 in parts...it can add up quick, but when those intakes start leaking oil and coolant, things can go sour quickly...espeically if coolant starts leaking into the engine, not good for bearings.

Dex cool is not the problem with these gaskets leaking, it's common on 3100's, 3400's, 3300's, etc, any motor from that series that has that style of lower intake is prone to the issue, the rubber/plastic/composite will eventually warp, break down, crack, seperate from hot and cold cycles, I've seen it all too many times. Dex cool is the best coolant out there, there's a reason that prestone, peak, zerex can't compete, in fact a few of those blends are blends that are less efficient that Dex that GM decided not to patent. But the Dex patent is due to run out soon to the point everyone can start using dex. One issue with dex is the "gum-up" problem when the mixture is not ideal and the level is left low, but flushing and setting proper mixture (50/50) and level will alleviate this problem.

Posted on Dec 09, 2008

  • 3 Answers

SOURCE: I have a coolant leak.2001 alero 4cy 2.4

Look around the sides of the motor. Aleros are famous for faulty pan gaskets. Ours has been in the shop twice for this. If the mechanic doesn't get it put in just right it will continue to leak.

Posted on Jan 26, 2009

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SOURCE: Coolant leak on 2001 Taurus.Coolant seems to be

heaterhose is in that general area. most common leak is that spraying aroung so it looks like something worse

Posted on Mar 17, 2009

keemo68
  • 1263 Answers

SOURCE: Passenger side coolant leak 2004 chevy monte carlo

it is most likely coming out of the weep hole at the water pump or the plastic fittings on the water pump to upper intake manifold they are black in color ands are L shaped with O-rings

Posted on Apr 19, 2009

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Why Am I Loseing Anti Freese Out The Radiator But i Find No Leaks Under My 2002 Chevy Monte Carlo


You are probably losing the coolant when the car is driving; when the water pump is pressurizing the system and if you are moving you won't see a puddle. Try idling your car for 15 minutes in your driveway & then look for the leak.

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Monte carlo blows cold air and overheats


It really runs hot within a minute of starting ?
An engine that runs hot in a few minutes is often having problems with the water pump or a blockage in the cooling system. The thermostat does not open until 195 degrees which takes 5 or 10 miles of driving.
During that time, the water pump should be circulating coolant in the block and the heater hoses.
A leaking head gasket should be putting extra pressure into the cooling system, and-or dumping coolant into the cylinders which would come out the exhaust pipe. But it should still take a few minutes for the engine to reach the boiling point of 240 degrees.

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Yes you are likely correct about the WP

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Thats interesting - - the engine should start even if the water pump has been removed.
An 86 model would have a V6 or a V8 engine and both use a distributor, have you checked for spark at the plugs and fuel in the carb or injector ??

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Antifreeze leaking


This is due to leak in the radiator or the hose or the water pump. In all cases your observation is MOST important as the visual check will give you the exact point of leak. fill up the radiator with coolant if there is a low level , check the pressure cap on the radiator. now if the engine is heating too much then the tuning /timing must be looked into. other wise the leak can be seen and the part replaced be it the radiator, hose or the water pump or bearings.

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It's a 99% chance of water pump leak or the housing at the timing chain that the water pump sits on.
Water pumps can and do leak one minute then seal themselves.
A cheap fix most use is go to a 7 lb pressure cap on the rad.

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Passenger side coolant leak 2004 chevy monte carlo


it is most likely coming out of the weep hole at the water pump or the plastic fittings on the water pump to upper intake manifold they are black in color ands are L shaped with O-rings

Apr 19, 2009 | 2005 Chevrolet Monte Carlo

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