I'm going to be replacing my timing belt soon and I was curious as to what else I should replace while I'm doing that so far I've heard water pump and the belt, is there anything else?

What model and year?  Mileage?  There's lots you should do while you're in there--new idlers, maybe the tensioner, crank & cam seals, oil pump re-seal, cam shaft O-rings--all accessible while you have the front end open.

 

Timing belt job is one of the biggest topics talked about here on the forum--try a search, you should find tons of info.  Good luck!

Make sure all the idlers and pulleys and tensioner are replaced. They usually fail before the belt does so swapping just the belt defeats the purpose.

 

If leakage is happening cam and crank seals are a good idea. If not, just do the timing kit and drive.

I agree with ol nick. 

 

all your front pulleys, If you don't replace these you will regret it,  and belt.  If your water pump hasn't been replaced,, do that too.  

 

Take off oil pump and replace o rings and tighten the screws inside it.

 

I would replace my cam seals and crank seal,,  (which is in the oil pump.)

Gates timing belt kit on amazon - tensioner, idlers, belt.

 

Reseal the oil pump - one oring, crank seal, and sealant around the pump body.  Tigthent he backing plate screws while it's removed.

 

Cam seals (and cam orings if it's an older EJ with those).

 

Water pump and Subaru OEM water pump gasket - the aftermarket gaskest suck.  Water pump failure on EJ engines is rare and overkill, it's the least likely item on this list to cause issues.

BEFORE removing the old timing-belt:

 

- Use a grease- or wax-pencil to MARK LINES on the belt, and on all the pulleys, and on the alignment marks on the block.

- THEN take some PHOTOS of this original setup.

- Then proceed...

 

The few minutes that you spend doing this will save a lot of angst later.