Question about 1990 Buick Century

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1990 buick century thermostae removal trouble

Thermostate removal

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  • Anonymous Feb 12, 2009

    how to replace a 1990 buick century thermostat



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  1. Disconnect the negative battery cable.
  2. Drain the cooling system.
CAUTIONWhendraining the coolant, keep in mind that cats and dogs are attracted byethylene glycol antifreeze, and are quite likely to drink any that isleft in an uncovered container or in puddles on the ground. This willprove fatal in sufficient quantity. Always drain the coolant into asealable container. Coolant should be reused unless it is contaminatedor several years old.
  1. Some models require you to remove the air cleaner assembly from the throttle body.
  2. Somemodels with cruise control have a vacuum modulator attached to thethermostat housing with a bracket. It your vehicle is equipped as such,remove the bracket from the housing.
  3. On the 4-cylinder engines,unbolt the water outlet from the thermostat housing, remove the outletfrom the housing and lift the thermostat out of the housing. On allother models, unbolt the water outlet from the intake manifold, removethe outlet and lift the thermostat out of the manifold.
1990 buick century thermostae removal trouble - 0900c152800cc162.jpgFig. 1: Loosen the clamp securing the hose to the thermostat housing 0900c152800cc163.jpgFig. 2: Remove the bolts securing the housing, then1990 buick century thermostae removal trouble - 0900c152800cc164.jpg 0900c152800cc164.jpgFig. 3: Make a note as to which end of the thermostat fits in the housingTo install:
  1. Clean both of the mating surfaces and run a 1/8 in. (3mm) bead of R.T.V. (Room Temperat1990 buick century thermostae removal trouble - 0900c152800cc165.jpgler in the groove of the water outlet.
0900c152800cc165.jpgFig. 4: Make sure both of the mating surfaces are free of any old gasket material
  1. Installthe thermostat (spring towards engine) and bolt the water outlet intoplace while the R.T.V. sealer is still wet. Tighten the bolts 17-21 ft.lbs. (23-28 Nm) on all but the 2.2L engine. Other engines tighten to 89inch lbs. (10 Nm).
  2. The remainder of the installation is thereverse o1990 buick century thermostae removal trouble - 69566fc.jpgFill the cooling system, start 1990 buick century thermostae removal trouble - 0a9a786.jpgand topoff. Check for leaks aft1990 buick century thermostae removal trouble - df83f61.jpgis started and correct as requi1990 buick century thermostae removal trouble - 59df070.jpgc="" alt="69566fc.jpg" class="h_mi" />0a9a786.jpgdf83f61.jpg59df070.jpg

Posted on Oct 19, 2008


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