Question about 1991 Mazda 323

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Where is the thermostat on my '91 mazda 323? - 1991 Mazda 323

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  • Mazda Master
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Thermostat REMOVAL & INSTALLATION 2.3L and 2.5L Engines

  1. Drain the cooling system below the level of the coolant outlet housing. CAUTION
    When draining the coolant, keep in mind that cats and dogs are attracted by 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. Fig. 1: Exploded view of the thermostat assembly for 2.3L and 2.5L engines Where is the thermostat on - 85553081.gif

  2. Disconnect the heater return hose at the thermostat housing located on the left front lower side of engine.
  3. Remove the coolant outlet housing retaining bolts and slide the housing with the hose attached to one side.
  4. Remove the thermostat from the outlet.
  5. Remove the gasket from the engine block and clean both mating surfaces. NOTE: It is good practice to check the operation of a new thermostat before it is installed in an engine. Place the thermostat in a pan of boiling water. If it does not open more than 1⁄4 in., do not install it in the engine. To install:
  6. Coat a new gasket with water resistant sealer and position it on the outlet of the engine. The gasket must be in place before the thermostat is installed.
  7. Install the thermostat with the bridge (opposite end from the spring) inside the elbow connection and turn it clockwise to lock it in position, with the bridge against the flats cast into the elbow connection.
  8. Position the elbow connection onto the mounting surface of the outlet, so that the thermostat flange is resting on the gasket and install the retaining bolts.
  9. Connect the heater hose to the thermostat housing.
  10. Fill the radiator and operate the engine until it reaches operating temperature. Check the coolant level and adjust as necessary.
3.0L Engine
  1. Drain the cooling system. CAUTION
    When draining the coolant, keep in mind that cats and dogs are attracted by 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.
  2. Disconnect the battery ground cable. Fig. 2: Thermostat installation for the 3.0L engine 85553085.gif

  3. Remove the upper radiator hose.
  4. Remove the thermostat housing bolts.
  5. Remove the housing and thermostat as an assembly.
  6. Remove the thermostat from the housing. To install:
  7. Clean all gasket material from the housing and engine.
  8. Turn the thermostat clockwise into the housing until the thermostat bridge is perpendicular to the mounting holes.
  9. Position the housing on the engine, using a new gasket coated with sealer. Tighten the bolts to 19 ft. lbs. (26 Nm).
  10. Install the hose, fill and bleed the cooling system, connect the battery ground cable and start the engine. Check for leaks.
2.9L and 4.0L Engines
  1. Drain the cooling system. CAUTION
    When draining the coolant, keep in mind that cats and dogs are attracted by 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.
  2. Disconnect the battery ground.
  3. Remove the air cleaner duct assembly.
  4. Remove the upper radiator hose. Fig. 3: Exploded view of the thermostat housing for the 4.0L engine — 2.9L engine is similar 85553086.gif
    To remove the thermostat, first remove the upper radiator hose, then the three attachiWhere is the thermostat on - 89683p11.jpg 89683p11.jpg
    Pull the thermostat Where is the thermostat on - 89683p12.jpg the intake manifold . . . 8Where is the thermostat on - 89683p13.jpg class=
    . . . then remove the thermostat 89683p13.jpg

  5. Remove the 3 thermostat housing attaching bolts.
  6. Remove the thermostat housing. You may have to tap it loose with a plastic mallet or your hand.
  7. Pull the thermostat from the intake manifold. To install: WARNING
    Do not use a sharp metal tool for scraping. Damage to the sealing surfaces could result and cause a leak.
  8. Clean all mating surfaces thoroughly. Ensure that tWhere is the thermostat on - 89683p14.jpging is properly seated. Install the thermostat with the release valve facing upwards 89683p14.jpg

  9. Make sure that the sealing ring is properly installed on the thermostat rim. Position the thermostat in the housing making sure that the air release valve is in the up (12 o'clock) position.
  10. Coat the mating surfaces of the housing and engine with an adhesive type sealer. Position the new gasket on the thermostat and place the housing on the engine. Tighten the bolts to specification.
5.0L Engine
  1. Drain the cooling system. CAUTION
    When draining the coolant, keep in mind that cats and dogs are attracted by 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.
  2. Disconnect the battery ground.
  3. Remove the upper radiator hose. Fig. 4: ExplodeWhere is the thermostat on - 89683g10.gife 5.0L engine thermostat and related components 89683g10.gif

  4. Remove the 2 thermostat housing attaching bolts.
  5. Loosen the bypass hose at the water pump.
  6. Remove the thermostat housing. You may have to tap it loose with a plastic mallet or your hand. To install: WARNING
    Do not use a sharp metal tool for scraping. Damage to the sealing surfaWhere is the thermostat on - 89683g11.gifsult and cause a leak. Fig. 5: Align the air bleed hole on the thermostat with the notch in the housing, which is also the 12 o'clock position 89683g11.gif

  7. Clean all mating surfaces thoroughly.
  8. Position the thermostat in the housing making sure that the air release valve is in the up (12 o'clock) position.
  9. Coat the mating surfaces of the housing and engine with an adhesive type sealer. PositiWhere is the thermostat on - prev.gifew gasket on the engine and place the housing on the engine. Tighten the bolts to specifications.
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Posted on Aug 01, 2010

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SOURCE: 91 mazda 323 wont rev out past 2500~3000rpm or idle

hi your problem may be that there is some debri in the main jet in carb that will not let sufficient fuel thro for further accelleration also if this is the cause then carb cleaner will not clear it you will have to physically clear it ? another possiblity ? is the fuel pump/or lines may not be delivering the fuel on demand for more revs ? ie pump / or filter clogged ?

Posted on Jan 27, 2009

  • 58 Answers

SOURCE: smell anit freeze inside my 91 mazda 323 fogs the

You need to replace the leaking heater matrix which is located in the heater box behind the dashboard / centre console

Posted on Apr 16, 2009

thunderz
  • 232 Answers

SOURCE: How can I manually pull codes from a 91 Mazda 323?

Any Napa parts store should be able to tell you.Give em a call

Posted on Mar 11, 2011

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jturcotte_746.gif

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