Hi guys,
I've noticed white deposits on the underside of the oil cap and am pretty sure the head gaskets gone.

Does anyone know or can confirm whether i can change this with the engine in?
Also, other then the timing/alternator/supercharger belts and gaskets, what else would be a good idea to replace while the head's out?
Thanks, any feedback is appreaciated.

Yes, the head gasket can be done with the engine installed.

Thanks for that, any tips/things to look out for when doing this?

Once you get the intake and supercharger off the motor, you can sit on the boot with your feet in the engine bay and do the rest :)

Haha, never would have thought of that, thanks for the tip.
 
Can anyone confirm that 90916-02157 is the right number for the super charger belt?
Oh and are the 4age 4agze timing belts interchangeable?
 

No idea on the supercharger belt, I just took the old shredded one with me to super cheap and grab the first Gates belt that was within 5mm of it.
 
4AGE/4AGZE use the same timing belt.

Thanks again, much appreciated.

Just wanted to check before taking any more parts off, can you remove the crank pulley bolt with a rattle gun or do you need a special tool with a breaker bar?
Thanks.

Kogashiwa Kai
Just wanted to check before taking any more parts off, can you remove the crank pulley bolt with a rattle gun or do you need a special tool with a breaker bar?
Thanks.

If you remove the drivers side wheel, undo the drivers side engine mount and lower the motor a few 20-30mm, I believe you get a nice clear path to get a breaker bar or rattle gun onto the crank pulley bolt. However, I have never done this myself, so cannot confirm the fine details or process as much as I would like.

Knightrous is correct, although that will usually allow a socket, bar and sometimes an extension on, the strut/caliper make a gun a bit of a squeeze. If you need a bit more space, loosen (dont remove) the front and rear mounts to allow the engine to droop a little further. I also recommend removing the drivers side mount instead of just undoing it so you can remove the timing belt.