Thermostat '04 H2

[OrangeCrush]

Originally Posted by ptownhummer

Noticed heat does not work except when engine speed reaches 40 mph or above. H2 now is overheating at idle but quickly cools at high rpms. I'm thinking thermostat needs replacing? Where is the thermostat located and is it easy to replace? I can't find a service manual to reference for help.

Follow the lower radiator hose to the housing on the waterpump. The housing sits sideways into the front, not on top like other vehicles. It sits directly below the idler pulley for the serpentine belt.

Anyway, it's extremely easy to change but before you do that, make sure you are full of antifreeze.

I'd hate for you to change it out and find out you are just low on antifreeze.

HTH's,

Mark

PS. Check your clutch fan too.

PSS. Welcome to the forum.