Question about Chevrolet Blazer

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It is leaking on the back of the radiator where the hoses come in. it's the hose underneath the big hoses and has a big nut on it. is there an o-ring or gasket for that and could that be my problem?

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Is it the automatic transmission cooler line leaking? If the fluid is red, then this is your issue.

Posted on Mar 28, 2011

  • hicksernj Mar 28, 2011

    no its coolant leaking its leaking in the upper right hand corner behind the radiator the second hose down

  • truffulaseed Mar 28, 2011

    That's the A/C condensor coil where it exits the radiator..... Although it is equipped with an oring seal, this oring prevents the loss of Refrigerant and refrigerant oil, not coolant. If it's leaking coolant from this location, then the radiator itself requires repair or replacement. If possible, I recommend the use of epoxy putty, I have used the same myself on multiple occasions to fix pin hole and cracks in radiator hose flanges, heater cores, and coils.

    Good luck!

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1 Answer

Water leak


Replace that hose. If it's a big hose, it must be one of your two radiator hoses. If it's a small hose (about 1 inch in diameter) it must be one of your two heater hoses, running from the firewall in back of engine to the engine. To replace hoses, drain your radiator before disconnecting hoses, or you will have coolant going everywhere. Good luck.

Jun 16, 2012 | 2004 Pontiac Grand Prix

1 Answer

Need to know where the thermostadt is at. Have leakage but can't find any hoses etc leaking.


If you have the V6 (2.5L) engine, be advised: it's a wearing task. Just getting to the radiator drain plug can be a problem without a 3/8 inch drive ratchet, a 3 inch extension, a universal joint. and a 19 mm socket. The drain plug is on the passenger side of the radiator on the engine side. The 19mm socket will fit over the drain plug to turn it open.
The coolant plumbing on this engine is the craziest I have ever seen. The thermostat is on the rear face of the engine (where the radiator hoses connect), but not on the upper hose where it connects to the upright pipe with the radiator cap on it, it is on the lower hose connection. Pull that hose off the housing, and remove the three bolts holding the thermostat housing to the engine. It will help if you first remove the big air inlet hose from the air filter housing to the throttle body. I wouldn't even bother with the thermostat till you have found the leak. Is any coolant leaking from the front of the engine, dripping off the bottom behind the crank pulley? That would be a water pump problem or SEAL, an o-ring on the back of the water pump. Now get on the driver's side and look around on the rear of engine nearest the firewall where engine and transaxle mate. Look down there for signs of coolant coming from rear of engine and running down onto the transaxle case. There is a metal pipe laying in the valley below the lower intake manifold, connecting the water pump at the front and the rear housing where the radiator hoses and heater hoses connect. This metal pipe uses an o-ring for a seal into the water pump, and the same size o-ring to connect to the rear housing. If one of those o-rings is leaking, you have a big problem getting to it.. I took the rear housing off once (never again!), Now I'm taking the water pump off to fix a leak. The water pump is run by the timing belt, so the front of engine needs to be stripped down, and the timing belt removed to take off the water pump. That metal pipe is held in place by a bracket with one bolt on the rear of engine; it may require taking the lower intake off (again) to get to both of those pesky o-rings. I hope you don't have the same problem, and if you have the 4 cylinder engine, the thermostat is a snap to replace, plus you don't have that crazy plumbing problem.

Apr 01, 2012 | 1997 Chrysler Sebring

1 Answer

How to pull a thermostat and where is locateed


Assuming you have the 2.7 liter engine, the thermostat is where the lower radiator hose returns to the engine.

2.7L Engine

  1. Disconnect negative cable.
    CAUTIONDo not remove pressure cap with the system hot and under pressure because serious burns from coolant can occur.
  2. Drain cooling system.
  3. Remove radiator lower hose from thermostat housing.
  4. Remove nuts from heater tube flange studs.
  5. Loosen starter bolt at heater tube bracket.
  6. Pull heater tube out of thermostat housing and position out of the way.
  7. Remove bolt and two studs.
  8. Remove thermostat housing, O-ring and thermostat.
  9. Remove thermostat housing bolts.

To install:
  1. Clean gasket sealing surfaces.
    NOTEInstall thermostat with the bleed valve located at the 12 o'clock position, between tabs on seal.
  2. Install thermostat and seal into thermostat housing .
  3. If removed, install two studs.
  4. Install thermostat, thermostat housing and O-ring and bolt. Tighten attaching bolts to 105 inch lbs.(12 Nm).
  5. Lubricate new heater return tube O-ring with coolant.
  6. Position heater return tube flange over two studs. Install nuts.
  7. Tighten retaining nuts to 53 inch lbs.(6 Nm).
  8. Tighten starter bolt to 40 ft. lbs. (54.3 Nm).
  9. Connect the lower radiator hose to the thermostat housing. Install hose clamps.
  10. Refill cooling system.
  11. Inspect for leaks.
  12. Connect negative cable.

Mar 18, 2012 | 2001 Dodge Intrepid

1 Answer

Water pipe has a open truck leaking anti-freeze need help locating part


I would think a good parts store could help you, even if it's a temporary replacement or fix, till you get the dealer's pipe. What hose is it? A big radiator hose, heater hose, or metal pipe with o-rings? I still say a temporary fix should work for awhile.

Nov 30, 2011 | 2004 Mitsubishi Endeavor

1 Answer

My 1994 sierra 1500 is leaking antifreeze right out. IS THIS MY WATER PUMP?


look in engine compartment from underneath- if water coming from directly over crank pulley(big one closest to ground) ,yes its the water pump- could also be lower hose(radiator hose closest to ground),if leaking up top - could be other radiator hose- if leaking near fire wall- heater hose- ?where is the water appearing?

May 18, 2011 | 1994 GMC Sierra

2 Answers

Looking for a picture of the diagram of where the thermostat is located on my 1998 2.7 liter dodge intrepid PLEASE!!!!!


Hi, I don't have a picture, but trace the big hose from the bottom of the radiator to the engine, and it will be under the housing where the hose connects.


2.7L Engine

  1. Disconnect negative cable.
    CAUTION Do not remove pressure cap with the system hot and under pressure because serious burns from coolant can occur.
  2. Drain cooling system.
  3. Remove radiator lower hose from thermostat housing.
  4. Remove nuts from heater tube flange studs.
  5. Loosen starter bolt at heater tube bracket.
  6. Pull heater tube out of thermostat housing and position out of the way.
  7. Remove bolt and two studs.
  8. Remove thermostat housing, O-ring and thermostat.
  9. Remove thermostat housing bolts.

To install:
  1. Clean gasket sealing surfaces.
    NOTE Install thermostat with the bleed valve located at the 12 o'clock position, between tabs on seal.
  2. Install thermostat and seal into thermostat housing .
  3. If removed, install two studs.
  4. Install thermostat, thermostat housing and O-ring and bolt. Tighten attaching bolts to 105 inch lbs.(12 Nm).
  5. Lubricate new heater return tube O-ring with coolant.
  6. Position heater return tube flange over two studs. Install nuts.
  7. Tighten retaining nuts to 53 inch lbs.(6 Nm).
  8. Tighten starter bolt to 40 ft. lbs. (54.3 Nm).
  9. Connect the lower radiator hose to the thermostat housing. Install hose clamps.
  10. Refill cooling system.
  11. Inspect for leaks.
  12. Connect negative cable.

Mar 26, 2011 | 1999 Dodge Intrepid

1 Answer

Flushing the radiator


there should be a hose pretty close to the radiator underneath the car, i'd probably trace the hose back to the radiator. it is a really really big hose. it takes a lot of muscle to remove it, but remove it right by the start of the radiator. then from there, just take a sprayer, and keep the big hose disconnected from the radiator, and flush it out. you probably could find a chemical to make sure that everything is removed, but this is a lot less expensive.after that, just make sure to get more collant, so your engine doesn't go up in flames

Jan 14, 2011 | 2005 Jeep Grand Cherokee

2 Answers

Wont hold water. big hose on the bottom of the radiator attaches 2 the engine and it leaks right out of the engine underneath that hose...


Well, if that Radiator hose is not leaking, then the Water pump seals have gone bad. More than likely you need a new water pump.

Vehicles w/ Timing Belt Driven Water Pumps Should Always Have The Water Pump Replaced When The Timing Belt Is Replaced.

If you do not, then the Timing Belt will fail, turning a low cost repair into thousands because of valve train damages. . .

For the Timing Belt & Water Pump KIT - its around $258 through NAPA
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Oct 25, 2010 | 1995 Toyota 4Runner

1 Answer

I need to know where the location of the thermostat is on a 1999 chrysler 300m so i can replace


The 2.7L engine lower radiator hose, connects to the thermostat housing.

To Remove:
1.Disconnect the Negative battery cable.
(Engine COLD!)
  1. Drain cooling system.
  2. Remove radiator lower hose from thermostat housing.
  3. Remove nuts from heater tube flange studs.
  4. Loosen starter bolt at heater tube bracket.
  5. Pull heater tube out of thermostat housing and position out of the way.
  6. Remove bolt and two studs.
  7. Remove thermostat housing, O-ring and thermostat.
  8. Remove thermostat housing bolts.
To install:
A.Clean gasket sealing surfaces.
B.Install thermostat with the bleed valve located at the 12 o'clock position, between tabs on seal.
  1. Install thermostat and seal into thermostat housing .
  2. If removed, install two studs.
  3. Install thermostat, thermostat housing and O-ring and bolt. Tighten attaching bolts to 105 inch lbs.(12 Nm).
  4. Lubricate new heater return tube O-ring with coolant.
  5. Position heater return tube flange over two studs. Install nuts.
  6. Tighten retaining nuts to 53 inch lbs.(6 Nm).
  7. Tighten starter bolt to 40 ft. lbs. (54.3 Nm).
  8. Connect the lower radiator hose to the thermostat housing. Install hose clamps.
  9. Refill cooling system.
  10. Inspect for leaks.
  11. Connect negative cable.
3.2 and 3.5L engines:
Disconnect the battery cable. (Again engine COLD)
  1. Drain cooling system.
  2. Raise vehicle on hoist.
  3. Disconnect electrical connectors from engine oil and power steering pressure switches.
  4. Disconnect radiator and heater hoses from thermostat housing.
  5. Remove thermostat housing bolts.
  6. Remove housing, thermostat, and gasket.
The OEM thermostat is staked in place at the factory. To ensure proper seating of replacement thermostat, carefully remove the bulged metal from the thermostat housing, using a suitable hand held grinder. It is not necessary to restake the replacement thermostat, into the thermostat housing.

To Install:
  1. Position gasket on thermostat and housing.
  2. Install thermostat housing, gasket and mounting bolts onto block. Tighten attaching bolts to 105 inch lbs. (12 Nm).
  3. Install radiator hose.
  4. Install bypass hose.
  5. Connect electrical connectors from engine oil and power steering pressure switches.
  6. Connect negative cable.
  7. Fill cooling system.
  8. Inspect for leaks.
  9. Lower vehicle on hoist.
From AutoZone Repair Guides

I feel this way, I can give you an accurate description, and have taken into account your safety.

May 12, 2009 | 1999 Chrysler 300M

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