Question about 1990 Buick LeSabre

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Thermostat what all do i need to remove to replace the thermostat on a 1990 buick century limited 3.3 engine?

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Usually the replacement thermostat.

Some sockets in the rights size to remove the thermostat from the car should be on one of the big hoses going into the engine. Some come with gaskets some don't need them. You usually get one with the thermostat when you purchase it from the store. Usually a very cheap part. 15 -20 dollars max.



Posted on Jan 19, 2009

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1 Answer

Removal of themstat in 1990 buick century


Have to remove the least amount of things that
is necessary to get at the thermostat

That is a pretty common problem even back in1990
& today forget it

Jan 29, 2013 | 1990 Buick Century

1 Answer

What are some systoms when the thermostat is going bad in a 1990 buick century


engine temp is higher than normal, temp will increase when engine is under load usually climbing an incline, it may take a considerable distance of level driving to reduce temp

May 30, 2012 | 1990 Buick Century

1 Answer

I Can Not Find The Thermostat On My 1998 Buick Century. Any Suggestions?


Locate the upper radiator hose. Follow it to the engine. Before it meets the engine, you'll notice that its clamped to a metal housing, usually mounted with 3 ten-millimeter bolts. This is the thermostat housing. Remove when engine is cool. Thermostat is inside. Remove old thermostat and replace ensuring the rubber o-ring aroung the outside of the thermostat if equipped. Good luck.

Sep 19, 2011 | 1998 Buick Century

1 Answer

Thermostat location on 1990 buick century


Find the thermostat on all vehicles like this:

The engine end of the upper radiator hose goes over a pipe stub, or nipple, and then has a hose clamp tightened around it to hold it on that part. That part is a housing, bolted to the engine, and the thermostat is under that housing.

Jun 27, 2010 | 1990 Buick Century

2 Answers

Looking for pvc valve on3.3/6cly 1990 buick


The PVC Valve is located on the valve cover of your engine.

Jun 16, 2010 | 1990 Buick Century

3 Answers

How to change a thermostat on a 95 buick century 6c


follow your top radiator hose to top of the engine, where it hooks up with a hose clamp. under that metal housing is your thermostat! usually 2 or 3 bolts you remove , then lift off the metal housing and take out your old thermostat and remove the old gasket with a razor blade.. install your new thermostat and gasket and away you go!! richie

Nov 03, 2009 | 1995 Buick Century

1 Answer

1990 buick century 3.3 engine cooling fan wont come on.


The fan switch is under the alternator. The turn on temp is 238. Have you checked power at the relay? If you ground the wire at the the temp switch does the fan come on?

Jul 04, 2009 | 1990 Buick Century

1 Answer

Getting at the thermostat housing bolts to change thermostat


Most thermostats are located in or near the intake manifold area. Locate your upper radiator hose, then from the hose/radiator connection, follow the hose backwards to where it connects to. The goose neck or mating part, has to be removed. The thermostat is usually located inside the port. You may have to remove other covers and or parts to gain access to the goose neck assembly. You also have to let the car cool and drain the coolant before performing this task.

Dec 12, 2008 | 1990 Buick Century

1 Answer

1990 buick century thermostae removal trouble


  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.
0900c152800cc162.jpgFig. 1: Loosen the clamp securing the hose to the thermostat housing 0900c152800cc163.jpgFig. 2: Remove the bolts securing the housing, then pull it away 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 Temperature Vulcanizing) sealer 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 of removal. Fill the cooling system, start the engine and topoff. Check for leaks after the car is started and correct as required.69566fc.jpg0a9a786.jpgdf83f61.jpg59df070.jpg

Oct 19, 2008 | 1990 Buick Century

1 Answer

1990 buick century limited


Have you tried replacing the pick-up coil?

Jul 12, 2008 | 1990 Buick Century

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