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Is it necessary to replace the gasket when replacing the thermostat on a 2002 Mazda Protegee?

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I would always replace the gasket when changing a thermostat. Old gaskets usually get damaged during removal and they're cheap anyway.

Posted on Oct 16, 2008


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I crash my mazda protegee 2000 i fixed but no starter no crank and the reverxse light doenst work

Does your engine turn over ? Did you test your starter or replace it ? Could have other damage not visible to the ***** eye.

Dec 30, 2015 | 2000 Mazda Protege

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02 626 mazda overheat issue

if this is fitted with a viscous fan hub and not electric fans then replace the hub. do the normal compression test and coolant pressure test to check cooling system and head gaskets.

Dec 23, 2014 | 2002 Mazda 626

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Where is the thermostat?

The thermostat is normally located in the aluminium elbow that the top radiator hose connects to. The elbow is usually held down by two bolts and it is only necessary to remove these to replace the thermostat. It may not be necessary to remove any hoses. Take care that the new thermostat is correctly located in its recess and the old gasketing has been completely removed and that the new gasket has a smear of gasket cement on it. While tightening the bolts, make sure that the elbow is seating evenly and not catching on the edge of the thermostat or you could crack the elbow.

Mar 17, 2011 | 2000 Mazda 626

2 Answers

2002 Mazda protege heater only blows cold air and engine is over heating. What could be wrong with this car?

1. See if simply adding coolant fixes it. 2. Try replacing the thermostat and the radiator cap. One way to check the thermostat is to start the engine and feel the upper radiator hose. The hose should not feel uncomfortably hot until the engine has warmed-up and the thermostat opens. If the hose does not get hot, it means the thermostat is not opening.
2. Look for antifreeze leaks, inspect the radiator, water pump and hoses. 3. If there are no leaks, and the above steps don't correct the problem, you might have a blown head gasket.

Oct 31, 2010 | 2002 Mazda Protege

1 Answer

How to replace a thermostat 1996 mazda mellinia


CAUTION When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.
1.5L, 1.6L, 1.8L (except K8) and 2.2L Engines
  1. Disconnect the negative battery cable. Drain the radiator to below the level of the thermostat.
  2. If necessary, remove the air cleaner assembly.
  3. If necessary, disconnect the coolant temperature switch at the thermostat housing.
  1. Remove the upper radiator hose.
  2. Remove the mounting nuts, thermostat housing, thermostat and gasket.
Do not pry the housing off.

To install:
  1. Clean the thermostat housing and the cylinder head mating surfaces.
  2. Insert the thermostat into the rear cylinder head housing with the jiggle pin at the top. The spring side of the thermostat should face the housing.
  3. Position a new gasket onto the studs with the seal print side facing the rear cylinder housing.
  4. Install the thermostat housing and 2 nuts. Tighten the nuts to 14-22 ft. lbs. (19-5 Nm).
  5. Install the upper radiator hose.
  6. If detached, connect the coolant temperature switch.
  7. If removed, install the air cleaner housing.
  8. Fill the cooling system. Connect the negative battery cable, start the engine and check for leaks. Check the coolant level and add coolant, as necessary.

2.0L Engine
See Figures 3, 4, 5, 6, 7, 8, 9 and 10
  1. Disconnect the negative battery cable.
  2. Drain the engine coolant from the radiator to below the level of the thermostat.
  1. Disconnect the lower radiator hose from the engine.
  2. Remove the housing bolts, thermostat housing, thermostat and gasket.
Do not pry the housing off.

To install:
  1. Clean the thermostat housing and the cylinder head mating surfaces.
  2. Make sure that the thermostat jiggle pin is aligned with the gasket projection.
  3. Install the thermostat to the housing. Align the gasket projection with the opening in the housing. The spring side of the thermostat should face into the housing.
  4. Install the thermostat housing cover and tighten both bolts to 14-19 ft. lbs. (19-25 Nm).
  5. Fill the cooling system. Connect the negative battery cable, start the engine and check for leaks. Check the coolant level and add coolant, as necessary.

Hope helps (remember rated this).

Jul 08, 2010 | 1996 Mazda Millenia

2 Answers

1998 Mazda 323 Protege - constantly overheating, even after fairly short runs (10 minutes). Coolant overflow bottle turns from green to dark grey each trip and almost "explodes".

Possible cause ;
1. Water pump
2. Thermostat
3. Bad head gasket.
4. Low coolant level.
Try to replace thermostat first , this way you illuminate thermostat and coolant level , you'll have to ad coolant after replacement and purge system.

May 03, 2010 | 1998 Mazda Protege

1 Answer

Where is the thermostate in a 2004 mazda 6 4cld

You're going to lose some coolant, so have a bucket or other container ready. Follow the upper radiator hose to the point where it's connected to the engine. The hose is clamped to a metal housing which is bolted to the engine. Remove the bolts (not the hose) and lift the housing to expose the thermostat (may require a little prying with a screwdriver or similar tool). Note how the old thermostat is fitted (which end is up), lift it out of the engine, and then remove all traces of gasket from the housing and the engine. Install the new thermostat and gasket, replace the bolts, add coolant as necessary, and you're done.

Mar 09, 2009 | 2004 Mazda 6

2 Answers

Changing the thermostat.

remove the air intake that is on top of the radiator with a 10mm socket then the large hose that goes to the engine is where the thermostat is housed. Unscrew those two bolts which are 12mm and pull out the old thermostat and rubber o ring gasket. Make sure you put the gasket on the new thermostat good and line it up then reverse the last steps til its back together

Aug 18, 2008 | 2002 Mazda Protege

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