Coolant leaks,When the intake manifold gasket cracks or blows out, coolant will leak out of the intake manifold. You may see puddles underneath your car or notice smoke or steam coming off of the engine and exhaust from the coolant dripping onto it and then burning.Overheating, If the intake manifold gasket fails and allows coolant to leak out into the engine, your car will begin to overheat. If your car frequently runs low on coolant or begins to overheat, check the intake manifold gasket.Running poorly, When the intake manifold gasket falters, it affects the way the motor handles its emission gases. The change in pressure can affect the vacuum in the intake as well as how smoothly your car runs. Mainly, it will idle roughly and may hesitate, cough or sputter.
SOURCE: How to change a water pump on a 1999 Buick Century 3100?
the water pump on the 3.1 isnt to hard to change ...
SOURCE: 1999 Buick Century thermostat question.
patience , and a 13 MM wrench , you gotta get your arms in there deep , that lower bolt does not need to come all the way off , the thermostat housing has a slot at the bottom for easier access , loosen it about 3.4 of the way and you can get the housing out , experience says a premium thermostat will give you grief trying to reinstall , get a regular duty thermostat .reverse procedure.
SOURCE: How to install intake manifold gaskets and their location.
go to autozone.com and register free then select make year ect.
select repair info (you have to register 4 this)
step by step and photos!!!!
SOURCE: Routine maintenance for 1999 Buick Century
have car scanned to identify the problem code as long as the light is on. go to any auto parts store and they will scan it for free.the codes will tell the problem.
Testimonial: "Good advice and information. Thank you."
SOURCE: 1999 buick century odometer light does not work
this is a common problem and the dash cluster must be removed and sent out for repair, cost is about $175 to replace the LED (Light emitting diode) display that has burned out, this is a faxtory defect as far as this expert is concerned, it is not a fuse problem.
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