you push the lever on the upper left side of the bowl
no. 1986 to 1990 sorry
It would be best to disconnect the coolant lines and flush the core after the radiator flush. This will clear any sediment from the core.
I UseValvoline 10W-30 in mine.
Jeep Comanche was created in 1985.
Go to your local Parts store and ask for a back flush kit and chemical flush. Follow the directions on each.
find your heater hoses and follow them. the flush is usually in an easily accessible location. It is very possible there is not a radiator flush valve. you may need to install one.
The price of a Jeep Comanche ranges greatly depending on the car's model year. A 1989 Jeep Comanche costs roughly $3000, while a 1988 Jeep Comanche can cost anywhere from $2000 to $4000.
Last I heard, there was no such thing as radiator sealant in a commanche. If you have a hole, you need a new radiator. Try tightning down all the hoses first, though.
in the glove box
There should be a drain at the bottom corner of the radiator on the side facing the engine.
through the overflow bottle
You need to replace the thermostat and flush the system of crud.