Question about 2001 Chevrolet Blazer

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Coolant leak on top of motor . Not sure where leak is. Hose or pump. Think its pump.Chev blazer 2001 2 dr.

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Use liquid soap on top of the coolant line, starting from the coolant tank hose, so to determine where the leak is coming from.

Posted on Mar 03, 2009

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2 Answers

Leaking coolant


There is a weep hole at the bottom of the water pumps to let you know the pump is worn and needs replaced.

Jan 23, 2014 | 2001 Chevrolet Blazer

1 Answer

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


Vehicles: Any with the above symptoms

A cracked cylinder block will cause either:
(a) motor oil contamination of engine coolant
(b) coolant contamination of motor oil
(c) white exhaust smoke, due to coolant seeping into one or more cylinders.
(d) more than one of the above
(e) all of the above

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.

Dec 03, 2011 | 1999 Honda CR-V

1 Answer

1989 Chevy S10 Blazer 4.3L V6 Automatic: Massive coolant leak occurred after letting truck sit for about 30 minutes after running it for around 1 hour. Coolant steadily flowed from what appears to be on...


Check the bottom side of the water pump for wetness, as well as the lower radiator hose. The water pump if leaking, will run the coolant down the front of the motor,and can appear to be coming from the top of the oil pan. It is nearly impossible for the top of the oil pan to leak coolant.

Aug 19, 2011 | 1989 Chevrolet S-10 Blazer

1 Answer

My blazer is over heating. I have changed the thermostat and flushed the radator and heater core. I have no leaks, but it still over heats.


Is the water pump working? When you run your car until it is at the operating range on the gauge, does the top radiator hose get warm (hot). Your motor block might have a calcium block. Make sure to use distilled water to fill up the rad.

Jan 23, 2011 | 2001 Chevrolet Blazer

1 Answer

Ok i have a major antifreeze leak,looks like is pooring from underneith motor and cannot find the leak...truck hasnt heatet up at all just parked it and there was white smoke witch looked like it was...


You didn't mention how many miles are on the vehicle but your symptom points to a water pump with failed seals. They don't often fail at less than 100K but they can.

There is a small hole at the bottom of the pump housing that allows coolant to leak out if the seals fail to prevent the coolant from ending up inside the engine and damaging it.

Jan 07, 2011 | 2001 Chevrolet Blazer

1 Answer

I HAVE ANITFREEZE LEAKS FROM MY 2000 CHEVY S10 BLAZER. IT'S HARD TO TELL BUT THE LEAK SEEMS TO BE COMING FROM UNDER THE MOTOR RATHER THAN FROM THE RADIATOR OR ANY HOSE I CAN SEE.


a common V6 failure is the intake manifold gasket. coolant will usually leak behind the water pump on the drivers side, however it can leak at other locations on the intake manifold gasket.

coolant leaks from other areas include the heater core, hoses, expansion plugs, trans cooler, and coolant overflow tank.

Jan 03, 2011 | 2000 Chevrolet Blazer

1 Answer

Heater not blowing heat only cold


Check the coolant level. It is common for the intake gaskets to leak causing the coolant level to drop. The first thing to stop working when the coolant gets low is the heater. Top off the coolant and determine where you are leaking coolant whether it be the intake gaskets, hoses, radiator, water pump, etc.

If the coolant is full what does the temp gauge say? Once the vehicle is warmed up it should read around the 200 degree mark. If its below 190 than the t-stat is stuck open. Replace the thermostat.

If both of those are fine and the coolant looks like mud than your heater core is plugged. You can try back flushing it with a water hose. Remove both of the heater core hose and use a water hose to flush out the heater core. This may take several tries before you start to feel some heat.

Nov 14, 2010 | 2001 Chevrolet Blazer

2 Answers

2001 kia sportage is over heating but has no leaks. the radiator has been flushed but is very rusty inside. The water is rusty inside the radiator. We have checked the resevoir, it is fine. the water...


Rusty is from running a bad or no mix of coolant. (PH level is off) You may have a water pump that has corroded impellers, and can't move the coolant as well any more. I would start by making sure to flush the engine block again, and make sure you flush water through every possible hose, and where you can get at it.

Jun 14, 2010 | 2001 Kia Sportage

1 Answer

2001 Chev blazer, brakes have been bled, peddle


You probably have air between the master cylinder and the abs pump. Fill the reservior and have someone pump the brake and bleed the primary lines at the abs pump. Good luck.

Apr 19, 2010 | 2001 Chevrolet Blazer

1 Answer

Radiator flush


The drain plug should be located on the drivers side on bottom of radiator. Should be a flat tab that you can use to unscrew it. Or the faster/messier way of doing it, is to pull of lower radiator hose. Alot faster but alot harder to catch coolant to reuse.

Sep 03, 2008 | 2001 Chevrolet Blazer

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