The thermostat for the 3.5 Liter is under a flange bolted to the top of the block (in the valley), connected to it is a black pipe that connects to the lower radiator hose. This flange has four bolts that are accessed only after removing the intake manifold. Removing the housing that connects to the upper radiator housing optional.
Its under the intake
1999 Isuzu trooper
I would start by checking the thermostat, it may not be opening.
The sister vehicle of the Isuzu Trooper is the Acura SLX
Radio antennae are located in the rear side windows.
Under the intake manifold, its very difficult!
In the fuel tank
the thermostat for this engine is located at the top front of the engine under the elbo that conects the hose to the top tank
how to set the timing on 3.5 liter engine on a trooper 98
Where is the thermostat located on a 1999 Mazda 626?