Question about Nissan Frontier

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Nissan frontier 01, leaks coolant back of engine

The leak seems to be coming from a pipe that is attached to the back side of the thermostat housing. does any body know what the problem would be and how to fix it.

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  • Anonymous Mar 19, 2014

    thinking it could thermostat housing

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  • 239 Answers

Tie the clamp

Posted on Jan 03, 2009

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CHECK HEATER PIPE OR HEATER HOSE AND CHECK COOLANT INLET PIPE FROM THE THERMOSTAT HOUSING. CHECK HEATER OUTLET HOSE FROM THE RADIATOR OUTLET PIPE.SOUND LIKE COOLANT LEAK COMING OFF TOP OF ENGINE.

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I have a coolant leak that is coming from the drivers side area near the air filter and top of transmission. Are there any coolant hoses on that side, I cannot see if the water is coming from a hose or...


Hi Chris,Your vehicle is a front puller with transverse engine. You need to remove the air cleaner housing and all allied units. Underneath it you will see a number of coolant pipes. There are those leading to the cold start system and the thermostat housing. Before beginning any work make sure the engine has stood until cold. When you have full visual you should be able to see stains where the coolant has leaked out. The marks are usually easy to distinguish. Do not remove pipes from a hot engine, as apart from the possibility of burning yourself, rapid changes in temperature may damage the engine. Make sure to fill with 40% coolant and add water to until full. Best regards Johngee10

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How do i remove a thermostate on a 2001 chevy cavilier


NOTE: When adding coolant, it is important that you use GM Goodwrench DEX-COOL® (orange colored, silicate free) coolant meeting GM specifications. On these vehicles, if silicated coolant is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner; at 30,000 miles or 24 months.
  1. Disconnect the negative battery cable.
  2. Properly drain and recover the coolant until the level is below the thermostat.
  3. Unfasten the coolant outlet-to-inlet manifold attaching bolt and nut, then remove the outlet.
  4. Remove the thermostat. Clean the inlet manifold and outlet mating surfaces. To install:
  5. Install a new O-ring onto the thermostat
  6. Place the thermostat in the inlet manifold.
  7. Attach the coolant outlet to the inlet manifold, using the bolt and nut. Tighten to 89 inch lbs. (10 Nm).
  8. Refill the engine cooling system.
  9. Connect the negative battery cable, then start the engine and check for coolant leaks.
2.3L and 2.4L Engines NOTE: When adding coolant, it is important that you use GM Goodwrench DEX-COOL® (orange colored, silicate free) coolant meeting GM specifications. On these vehicles, if silicated coolant is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner; at 30,000 miles or 24 months.
  1. Disconnect the negative battery cable.
  2. Properly drain and recover the coolant to a level below the thermostat.
  3. Unfasten the cover-to-outlet pipe bolt, which is accessible through the exhaust manifold runners.
  4. Raise and safely support the vehicle.
  5. Disconnect the radiator and heater hoses from the outlet pipe.
  6. Unfasten the outlet pipe-to-oil pan bolt and the cover-to-outlet pipe bolts.
  7. Remove the thermostat, then clean the old gasket material from the mating surfaces. To install:
  8. Position the thermostat in its correct location, then install the cover-to-outlet pipe bolt. Tighten the bolt to 10 ft. lbs. (14 Nm).
  9. Install the outlet pipe-to-oil pan bolt. Tighten the pipe-to-oil pan bolt to 19 ft. lbs. (26 Nm) and the pipe-to-transaxle bolt to 40 ft. lbs. (54 Nm).
  10. Connect the radiator and heater hoses to the outlet pipe.
  11. Carefully lower the vehicle.
  12. Install the cover-to-outlet pipe bolt through the exhaust manifold runner.
  13. Properly fill the cooling system, then connect the negative battery cable.
The thermostat is located in the lower radiator hose on the 2.2L engine


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Thermostat removal and installation - 2.3L and 2.4L engines


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Where is the thermostat


It should be at the front of the engine where the upper radiator hose is attached to the engine. The radiator hose will be attached to the thermostat housing with a hose clamp. The thermostat housing should have two bolts holding it in place. Remove the gbolts(engine cold) and raise the housing up, The thermostat will be underneath. Make sure the new thermostat is facing the right way when you install it, Don't forget the gasket. Bolt the housing back in place and install the radiator hose and clamp. Replenish any coolant that was lost to bring the coolant level back up. Run the engine long enough for it to warm up. Check for leaks, monitor the temperature guage to make sure it reaches normal temp without overhearing, and make sure the heater is blowing warm air.

Dec 21, 2010 | 1995 Nissan Pickup

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Cant get to thermosts housing unit on 01 Nissan Xterra


Nissan Frontier, Xterra 1998-05
Thermostat Removal & Installation - 3.3L Engine

d6cb142.jpg

Fig. Thermostat assembly and related components-3.3L engine (clock over pic for zoom)

NOTE Never remove the radiator cap when the engine is hot. Serious burns could occur from high-pressure engine coolant escaping from the radiator.
  1. Be sure the engine is cold.
  2. Disconnect the negative battery cable.
  3. Drain the coolant. Properly disposed of used coolant.
  4. Remove the upper and lower radiator hoses. Remove the fan shroud.
  5. Remove the drive belts and the pulley bracket.
  6. Remove the water inlet retaining bolts.
  7. Remove the water inlet and the thermostat.
To install:
  1. Installation is the reverse of the removal procedure.
  2. Be sure to apply a continuous bead of the proper grade and type RTV sealant to the housing.
  3. Install the thermostat with the jiggle valve or air bleeder at the upper side.

    377e77c.jpg
    Fig. Thermostat jiggle valve/air bleeder location-3.3L engine
  4. Be sure to refill the cooling using the proper grade and type engine coolant.
  5. Start the engine and check for leaks.
  6. Start the engine and allow it to reach operation temperature. Recheck the coolant level, fill as required.
Hope helps (remmeber rated this).

Jun 07, 2010 | 2001 Nissan Xterra

1 Answer

My 2001 Nissan Frontier 4x4 (6 cyl) is leaking coolant. the coolant is dripping down to the back of the engine and off of the transmission housing. a friend told me that water pumps will do that if they...


If its leaking at the rear its probably not the pump, the pump is in the front. It could be the rear of the intake manifold gasket.Or a heater hose that routed over the rear of your engine. Someone really needs to see where the fluid leaking out to make the call. Try to get a good strong flash light on the leak.Maybe even try lay on you back and slideing under with the light and look up the back side of your engine while its leaking. Engine in park of course. Eye protection needed here. Lay off to the side and look up at an angle so you dont get the coolant on your face or skin. Wash well if you get wet.

Sep 01, 2009 | 2001 Nissan Frontier Crew Cab

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How do I replace the thermostat on my 2002 Nissian Frontier


Follow the upper radiator hose to the engine. Remove the hose. There are 3 bolts holding the thermostat housing in place, remove them. Remove the thermostat and clean all surfaces. Install new thermostat. Apply a thin amount of gray silicone sealer to the thermostat housing. Install housing and retaining bolts. Install hose and secure. Add coolant and check for leaks.

Jul 13, 2009 | 2002 Nissan Frontier Crew Cab

1 Answer

I have a coolant leak coming from the front of the engine. looks like it is leaking around the cam shaft pulley. The vehicle is a 2001 Nissan Frontier v6


Sounds like either the water pump or the thermostat housing. The water pump has a small hole in the bottom where the shaft comes through, when the water pump gets worn it will leak here so you know to replace the pump. The thermostat housing will be at the motor end of the upper radiator hose where it attaches to the motor. Hope this helps.

Aug 11, 2008 | Nissan Frontier Cars & Trucks

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