Question about 2002 GMC Yukon XL

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Could it the water pump

Leaks coolant from hose thats going to fire wall, bottom hose

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Coolant leaks can be difficult to trace because the leak can migrate away from the source. To start with, dry off all areas that are wet. Then ,with a flash light, inspect the hose and water pump to see where the leak originates. This is done with the engine running so be mindful of all moving parts as you look through the engine compartment. It may be the hose that is leaking.

Posted on Apr 21, 2014

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Posted on Jan 02, 2017

  • 62 Answers

SOURCE: 2000 GMC Sierra leaking coolant

sounds like your water pump is probably leaking but do a quick look above to make sure its not leaking down from above

water pumps arnt that hard to do you will have to loosten the belt and probably remove the fan\
just get your self a repair manuall

Posted on May 14, 2009

canbruce75
  • 1776 Answers

SOURCE: MY TRUCK IS LEAKING SOMETIMES COOLANT, COULD IT BE

Check the radiator and hoses for leaks. Also, look at the water pump and see if any coolant is leaking out of the vent or "weep" hole. If coolant is leaking from the weep hole, the water pump is defective and will need replaced. When checking hoses, look for cracks and leaks, especially around the hose clamps. Hope this helped and best wishes.

Posted on Aug 05, 2009

  • 41 Answers

SOURCE: leaking coolant from around water pump just put in

To much pressure in a cooling system mill cause leaks everywhere. Even on new parts. Check radiator cap for gunk and make sure pressure valve is working. The highest pressure for cooling systems should be 17 psi and not any higher.

Posted on Oct 29, 2009

  • 89 Answers

SOURCE: I have a 1990 gmc 1500 5 speed that is overheating

It sounds like you have covered the basics. I will provide a list of some of the more major things. I would recommend having the coolant system pressure tested, as well as a compression test on the cylinders. At this point, it could be one of the following. 1: The bypass hose (This connects from the intake to the water pump) 2: Leaking freeze plug or plugs 3: Leaking intake manifold gasket or cracked intake 4: Bad head gasket or cracked head 5: Cracked block Having the coolant system pressure tested should expose any external leaks. Having the cylinders compression tested may tell of any internal problems.

Posted on Jan 02, 2010

wracefans24
  • 1985 Answers

SOURCE: not sure if i have a problem but the low coolant

it will be cold untill the thermostat gets to 195 degrees and that lets the coolant circulate thru out the engine and radiator

Posted on Jan 24, 2010

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Leaking anti freeze from water pump screw


Most water pumps have a weep hole that leaks when the pump seal is broken. Usually indicates the water pump needs replaced.

Mar 01, 2014 | Dodge Shadow Cars & Trucks

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Possibility of a cracked block. how can i be sure/


Vehicles: Any with the above symptoms

A cracked cylinder block will cause either:
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Oil infiltrating into coolant is easy to see - drain some coolant out through the pepcock at the bottom of the radiator, and place it into a styrofoam coffee cup. Oil droplets floating on top of the green (or orange) coolant are easily seen. Or visualize oil by looking into the top of the radiator through the radiator cap.
Coolant infiltrating into and mixing with motor oil will permanently damage the engine (seizing it up through loss of lubrication), and must be prevented.
A leak from above the front suspension is, as physicians like to put it, "nonspecific", with the most likely cause a water pump seal or hose/hose connection.
A leak from near the fire wall will usually be a heater core hose, or hose connection.
A coolant leak on the same side of the engine as the water pump is a leaking water pump or water pump seal until proven otherwise.

To rule out everythng else, here's the 1999 Honda CR-V Troubleshooting Guide for Coolant Loss/Coolant Leaking:

Priority Action Part Type Cause
1 Inspect Water Pump - Worn, Cracked or Leaking Water Pump, or Water Pump gasket.
2 Inspect Head Gasket - Leaking Head Gasket.
3 Inspect Radiator - Leaking Radiator Hose(s).
4 Inspect Radiator Cap - Worn or Damaged Radiator Cap.
5 Inspect Radiator Hose - Ruptured, Cracked or Leaking Radiator Hose.
6 Inspect Freeze Plug - Leaking Freeze Plug(s).
7 Inspect Intake Manifold Gasket - Leaking, Worn, or Damaged Intake Manifold Gasket.
8 Inspect Water Outlet - Cracked, Leaking or Damaged Water Outlet.
9 Inspect Heater Control Valve - Leaking or Faulty Heater Control Valve.
10 Inspect Radiator Drain Pepcock - Loose, Damaged, or Faulty Radiator Drain Pepcock, or Pepcock O-ring.
11 Inspect Engine (DOMESTIC ONLY) - Cracked Cylinder Block Leaking Coolant into at least one Cylinder, causing white exhaust smoke.

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1 Answer

Van is losing water but the overflows continues to stay full. No cracks in radiator and the cap where you put in the water has a hose going in but no hose on the opposite opening.


In a properly working system, the coolant expands as the coolant temp rises. The excess coolant flows into the overflow container by the hose that runs from the bottom of the overflow to the top of the radiator, under the radiator cap. When the coolant begins to cool down, it contracts,drawing fluid back into the radiator from the overflow. The water pump has a "weep" hole located near the bottom of the pump housing that will leak coolant if the pump is going bad. In some engines, the 3.0, the water pump is located under the camshaft timing belt cover, and is a BEAR to deal with. However, the coolant should be pulled into the radiator when the engine cools, so check that the hose from the top of the radiator is attached to the bottom of the overflow and that it is not blocked or pinched. Have the system pressure tested to verify that it has no leaks. Hope this helps. Dano

Jul 10, 2011 | 1992 Plymouth Voyager

1 Answer

I have 1998 cadillac seville. Added coolant, but air-conditioner didnt come on. Cleared ACM code and air came on. Next day hot water was leaking on foot pedal while I was driving!


hi is water or coolant that is leaking .if its coolant leaking your heater core
needs to be replaced .put if its water leaking all you have is clogged water
drain . to fix open hood on the passenger side fire wall is a small "L" shaped hose
that comes out of the fire wall and not connected too anything clear hose
BEFORE PUTTING HANDS BY FIRE WALL &ENGINE MAKE SHORE
ENGINE IS OFF AND COLD . IF NOT YOU CAN GET INJURED

Jun 13, 2011 | Cadillac Seville Cars & Trucks

2 Answers

My s 430 has smoke coming from under hood after driving but not all the time temp gauage reads normal. I had oil and trans leaks sealed but it is still happening, what else could it be? Thanks


SMOKE UNDER HOOD COULD BE COOLANT LEAK FROM RADIATOR ITSELF OR CHECK FOR LEAKING TOP RADIATOR HOSE AND CHECK FOR LEAKING BOTTOM RADIATOR HOSE.LOOK UNDER THE HOOD IF COOLANT BOILING OUT COOLANT OVERFLOW JUG ENGINE OVERHEATING FROM BAD THERMOSTAT OR BAD WATER PUMP.CHECK FOR COOLANT LEAK AT WATER PUMP WEEP HOLE.IF SO WATER PUMP NEED REPLACING.ADD MORE COOLANT UNTIL LEVEL CORRECT.TRY LOCATE LEAK. IF CAR OVERHEATED AND BOILED IT OUT. SMOKE UNDER THE HOOD CAN ALSO BE CAUSED BY LEAKING VALVE COVERS WHICH CAN BE FIRE HAZARD IF OIL LEAKS ON HOT EXHAUST MANIFOLD.

Mar 21, 2011 | 2002 Mercedes-Benz S-Class

1 Answer

Water leaking on passenger floor


Check, if it's coolant, going to be a leaking heater core, if it's water, a/c drain clog up, go under hood, passenger side fire wall, look for little hose coming out of fire wall, stick a pen in there to unclog.

Aug 16, 2010 | 2004 Jeep Grand Cherokee

1 Answer

My car just started to note that I needed to check my coolant level ab out a week ago. I would pour coolant in, and it would leak out. I thought it might of been when the A/C was on, but it was leaking a...


There are a few connections ports that need to be checked. if you cannot find the leak at these places then that happens at the seal of the water pump. When the water pump seal is bad then time to replace the water pump. Why? it is the same labor for the job. Hope that you don't get overheat. This is happening when your water pump is not turning: broken bearings.

Therefore check these following connections first, sometimes the rubber hoses get deteriorated then the clamps need to be tightened to minimize the leak.
1- Upper hose connect to radiator.
2- Lower hose connect to bottom radiator and engine port that is water pump inlets
3- Over flow hose.
4- 2 Heater hoses coming to the fire walls.
Hope this can help.

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The AC condensation drain tube is also located on the passenger side fire-wall towards the bottom of the fire-wall, it is there to drain the condensation from the evaporator/core plenum so that it does not flood the passenger compartment floorboard with water and it can easily be viewed from under the vehicle, and if it is cool clear water that is leaking and not hot coolant then you have no problem and that is a normal condition when the AC is operating.

If it was a coolant leak the cooling system would be low on coolant, and the engine would run hot when the coolant gets low.

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1997 Monte Carlo coolant loss question. Coolant loss only in winter, assuming due to heater. No dampness in car, or fogging of windshield. No coolant on garage floor when ran for extended period with...


Most likely a bad seal on the water pump. They will shrink up when it gets real cold out and leak. Look for a white line on the bottom side of the hood as it usually is the only indicator when that happens. The water pump is prety easy to replace too. good luck

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