If this is the 2.5 liter engine it is located where the lower radiator hose bolts to engine not at the top of the engine manifold, spring goes towards engine.
follow the bottom right hand pipe to underneath the engine remove pipe and then remove thermostat housing and replace thermostat the same way as it comes out.
To change the thermostat on a 2005 Subaru Impreza, first ensure the engine is cool and disconnect the negative battery cable. Drain the coolant and remove the upper radiator hose connected to the thermostat housing. Unbolt the thermostat housing, replace the old thermostat with a new one (ensuring proper orientation), and reassemble everything by reversing the disassembly steps. Finally, refill the coolant and check for leaks after starting the engine.
To change the thermostat on a 1999 Subaru Impreza Turbo, first, ensure the engine is cool and then disconnect the negative battery cable. Drain the coolant by removing the radiator drain plug, then locate the thermostat housing, which is usually near the engine block. Remove the housing by unscrewing the bolts, take out the old thermostat, and replace it with a new one, ensuring the gasket is in place. Finally, reassemble the housing, refill the coolant, and reconnect the battery.
one is under the hood on left side the other is behind the change tray on lower left steer column area
Look in the manual.
Have a look at ; www.carbasics.co.uk
105k is the recommended time.
To change the park light on a Subaru Impreza prop the trunk lid open and locate the taillight housing. Remove the plastic cover and the bulbs for the parking lights. Replace the bulbs.
I have a 1999 Subaru Impreza O/B Sport (same 2.2L engine just an automatic, but the transmission type should not matter at all with the thermostat location) and the thermostat is located in an elbow (metal) just under the radiator (somewhat left of the oil filter). Please heed warning, however, that you may want to expose the two screws to some PB Blaster-like (or rust/corrision solvent) prior to trying to change. The screws are steel and rusted in, causing one to break and you may play hell trying to retap the screw hole (bolt hole). In all, if the bolts come out easily it should take less than one hour to change the thermostat--very easy to get to. Hope this helps...
that the knock sensor does
I have a 2008 Subara Impreza. When should i change the timing belt? Do i also need to change the cogs, tension bars and water pump??
Go to subaruoutback.org Subaru Outback > General > Do-It-Yourself Illustrated Guide > Replacing lights on the instrument cluster. Good luck...