It is easiest to remove the thermostat and drain the radiator by removing the lower hose. Dispose of the coolant properly. reinstall the lower hose and run water from the garden hose through the engine with it idleing until it runs clear. Then remove the lower hose to drain the radiator and reinstall the thermostat with the spring toward the engine. Then fill the radiator with coolant and start the engine up and top off the radiator after the thermostat opens. You should end up with about a 50/50 mixture of coolant and water. Good Luck Joe
You can find the 1991 Buick Skylark radiator drain plug on the bottom of the radiator. The radiator drain plug will be in the center of the radiator bottom.
If it has a coolant tank, that's the "cap".
The thermostat on a 1991 Buick Skylark is located near the engine. To find the thermostat, follow the top radiator hose directly to the thermostat.
a 1991 buick skylark has 4" speakers in the dash and 6x9's in back
how do you replace a ignitionswitch tumbler 1991 buick skylark
where does a clutch relay seleniod go in at on a 1991 buick skylark
I'd say about 2.5 tons.
The PVC valve for a 1991 Skylark should be located on the top of the valve cover. It is a plug in type, twist and pull to remove.
Under dash with fuses. Very hard to see.
at the bottom of the radiator on the driver's side.
Either a 2.3/2.5 4cylinder or a 3.0 V6
a round one that you can order online
Probably a worn-out or clogged heater core.
I believe that one is under the car near the gas tank.
Probably. An auto store would know for sure.
As far as I've read (check dealer for accuracy) 4cyl 2.5L is .040
On your 1991 BUICK SKYLARK, the FUEL FILTER is: UNDER VEHICLE, CENTER, BELOW REAR SEATING AREA, REAR PASSENGER SIDE OF FUEL TANK, MOUNTED IN FUEL LINE You can find this stuff free at autozone.com under repair info, component location.
Pressure test system and watch for leak
break the windows
Try changeing the fuel filter,I had the same problem and it helped.
If the radiator is original, LEAVE DRAIN PETCOCK ALONE !! You may NOT be be able to close it completely due to rust. Disconnect lower radiator hose instead.
It's right in the front and off a little to the passenger side. Big round thing with a belt running to it and a fan. You can't miss it.
on front of motor behind the radiator.
In a removable housing at the engine end of the upper radiator hose
It should be right there on the fuse box. If you still can't find it, try calling a service center at a GM dealer.