Question about 1991 Nissan Sentra 2 Door

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Where is the thermostat located on a 1991 nissan sentra

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  • jerry vasquez Jan 23, 2012

    get a 1991 nissan sentra manual. instructions wow.

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  • Nissan Master
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Thermostat REMOVAL & INSTALLATION 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. E-Series Engines NOTE: The engine thermostat is housed in the water outlet casting on the cylinder head.

  1. Open the draincock on the radiator and drain the coolant into a suitable drain pan.
  2. Remove the upper radiator hose from the water outlet side and remove the bolts securing the water outlet to the cylinder head.
  3. On E16 models, remove the exhaust air induction tube clamp bolts, then the water outlet bolts.
  4. Remove the water outlet and thermostat. To install:
  5. Clean off the old gasket from the mating surfaces with a razor blade or equivalent.
  6. When installing the thermostat, be sure to install a new gasket and be sure the air bleed hole in the thermostat is facing the left side (or upward) of the engine and that the spring is toward the inside of the engine. Also make sure that the new thermostat to be installed is equipped with an air bleed hole.
CA16DE, CA18DE and GA16i Engines Fig. 1: Always make certain the jiggle valve is facing upward when installing the thermostat where is the thermostat located on a 1991 nissan - 88163g33.gif
  1. Disconnect the negative (-) battery cable and drain the coolant from the radiator and the left side draincocks on the cylinder block.
  2. On GA16i engines, disconnect the water temperature switch connector from the thermostat housing.
  3. Remove the radiator hose from the water outlet side and remove the bolts securing the water outlet to the cylinder head.
  4. Remove the thermostat and clean off the old gasket or sealant from the mating surfaces. To install:
  5. Install the thermostat with a new gasket. When installing the thermostat, be sure to install a new gasket or sealant and be sure the air bleed hole in the thermostat is facing the left side or upward on the engine. The jiggle valve must always face up. Also make sure the new thermostat to be installed is equipped with an a ir bleed hole. Some thermostats have the word TOP stamped next to the jiggle valve. Again, the word TOP and the jiggle valve must be facing up. NOTE: When using RTV sealant instead of gaskets, make sure the surface you are working on is very clean before applying the sealant, then apply an even bead. Allow the RTV to dry slightly to form a thin skin. The component MUST be tightened before the RTV dries completely. The bolt torque should be checked again after RTV has completely dried.
  6. Install the water outlet and upper radiator hose.
  7. On GA16i engines, connect the water temperature switch connector to the thermostat housing.
  8. Fill the cooling system and connect the negative (-) battery cable.
  9. Bleed the cooling system as outlined in this section.
1.6L (GA16DE) and 2.0L (SR20DE) Engines Fig. 2: Thermostat and housing — SR20DE engine 88163g34.gif
Fig. 3: Thermostat and housing — GA16DE engine 88163g35.gif
Fig.where is the thermostat located on a 1991 nissan - 88163g36.gifake certain the jiggle valve is on the top side — GA16DE engine shown 88163g36.gif NOTE: The thermostat is housed in the water outlet casting on the cylinder head on most models. On the GA16DE engines, the thermostat is housed in the water outlet casting attached to the water pump.
  1. Disconnect the negative (-) battery cable.
  2. When cool, open the draincock on the radiator and drain the coolant into a suitable drain pan.
  3. Remove the upper radiator hose from the water outlet side and remove the bolts securing the water outlet to the cylinder head and any other components in the way.
  4. Remove the water outlet and thermostat. To install:
  5. Clean off the old gasket from the mating surfaces of the thermostat housing and engine block. NOTE: When using RTV sealant instead of gaskets, make sure the surface you are working on is very clean before applying the sealant, then apply an even bead. Allow the RTV to dry slightly to form a thin skin. The component MUST be tightened before the RTV dries completely. The bolt torque should be checked again after RTV has completely dried.
  6. When installing the thermostat, be sure to install a new gasket and be sure the air bleed hole in the thermostat is facing upward and that the spring is toward the inside of the engine.
  7. Install the water outlet and tighten the bolts.
    • GA16DE — 13–16 ft. lbs. (18–22 Nm)
    • SR20DE — 60–72 inch lbs. (6–8 Nm)
  8. prev.gif next.gif

Posted on Aug 03, 2010

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