'99 4Runner Limited V6. I'm getting all the parts I need on-line to have the timing belt and waterpump replaced. I'm going to replace the gaskets for the timing belt cover. Do you know how many I need? 1 for the lower cover. What about the upper cover? Outer gasket and inner gasket? Is it 1 for outer and 4 for inner? That's what I was told.
Does the stock thermostat part# 9091603075 come with a gasket or does it have to be ordered separately?

Here are the part#'s I have so far. May be of some help for future timing belt replacement questions here.

Timing belt.........13568-69095
Idler#1 upper......13503-62040
Idler#2 lower......13505-62070
Tensioner...........13540-62021
Cam seals x 2......90311-38051
Crank seal..........90311-40022
Crank bolt..........90119-16006

Gaskets for timing cover
lower cover.................11328-20020
upper cover/outer........11329-20010
upper cover/inner x 4....11319-20010

ac belt....................99364-20870-78
ps belt....................90080-91126-83
alt belt...................90080-91090-83

Waterpump.............16100-69398-83
Thermostat.............90916-03075
Therm.gasket..........16325-62010
upper Rad Hose.......16571-62070
lower Rad Hose.......16572-62090

 

I wouldnt worry about the gaskets for the timing covers, unless they're totally messed up. The gaskets only really keep large chunks out anyway.

And my thermostat didn't come with a gasket, but the water pump came with a thermostat gasket and the water pump gasket.