Thread: 4BD1 Thermostat

Originally Posted by Rangier Rover

My 4BD1 runs to cold and can get hot on a long hard hill on a 40+ day.
I'm thinking thermostat is shot.
I have been quoted $98 for a new thermostat Is that right?
I'm not sure what temp it should be or what else fits the 4BD1.

Any ideas?

Thanks Tony

A properly functioning thermostat is essential in a $BD1. You will not get good performance or fuel economy when they run cold. $98 is too much. I got one from Brisbane Isuzu for $52. FWD quoted $74.

Try your local Isuzu dealer - I get mine from Fred Smith in Melbourne, so I can't help locally. Except, don't try Repco - the one they have listed for the 4BD1 is the wrong one. Make sure you get a rubber gasket to go with the new thermostat.

In almost 500,000km two thermostats is just about the total of repairs to my engine (also sump gasket & a few other O-rings etc, plus alternator and starter repairs). As Brian says, thermostat is essential, although it is as well for most engines.

John

Originally Posted by Rangier Rover

My 4BD1 runs to cold and can get hot on a long hard hill on a 40+ day.
I'm thinking thermostat is shot.
I have been quoted $98 for a new thermostat Is that right?
I'm not sure what temp it should be or what else fits the 4BD1.

Any ideas?

Thanks Tony

Tony

Only use a genuine Isuzu thermostat - 78 degrees opening temp or 82 degress opening temp - price should be between $55 and $75 depending on where you are (including Grand Scale Theft)

Christopher