Find the upper radiator hose. One end is attached to the radiator, the other is attached to a housing and the housing is bolted to the intake manifold. You'll have to remove the hose from the housing and then unbolt it to find the thermostat inside.
follow the upper radiator hose to the thermostat housing on engine. Thermostat is located under the thermostat housing.
The fuel pump relay allows the pump to be turned on and off. On a 1986 Chevy Astro van, the fuel pump relay is located under the hood and directly in front of the passenger seat, to the right of the A/C clutch control relay.
left to right
Follow the top radiator hose down to the water outlet; your stat is in there.
The thermostat for this car is located in the water pump housing from the lower radiator hose.
open it up and back into a tree this worked for me
Not removable- replace entire hinge assembly
Astro and Safari 100 ft. lbs.
look on the distributer side of the engine, right beside the fuel pump is a gooseneck with two bolts .water hose from the bottom of radiator connects to this gooseneck. loosen the two bolts and the thermostat is there
The thermostat is almost always located on the top of the engine block, usaully in front of the carberator. Unfortionately, sometimes it is located on the bottom the block
It is in the big water hose on the in side
It is quite simple to replace the four-way flasher relay switch in your 1986 Chevrolet Astro Van. The four-way flasher relay switch simply plugs in and out.