Timing marks on crank and cams. If you put a long screwdriver in through #1 spark plug hole. It will rest on top of piston and you'll see it raise as you turn the crank to TDC (Top dead center). This will give you the confidence your piston is up, just as timing mark indicates. The cams will have to be turned into position also. Just remember the "T" above each cam is NOT the timing mark.
Tip remove all spark plug, makes life easier.
See the bump on the oil pump case and notch on the crank gear, that's TDC,
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These look a little different then you'll see because their VVt actuators on the cams. But mark are the same.
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Front of engine
LH--RH
1----2
3----4
5----6
7----8
Coolant:
System takes 12 qts of 50/50 coolant (system cap. 16.3 qts). I like to buy 2 gallons of Toyota LL (red) 100 % and about 7 or 8 gallons of distilled water. Fill system up with distill water after draining both block drains and radiator. Run engine until hot, cool down a bit and drain again. Then repeat for a second flush, don't shortcut this. You'll then have about one gallon left in the system most in heater core and some in engine pockets of very weak mix (~10/90%). Pour into radiator a gallon of red 100%. Then mix 1/2 of remaining gal of red into your jug, and half with water, yielding a jug of 50/50 ready to pour in the system. Fill your system with this 50/50 mix. Squeezing upper radiator hose will help burp the coolant system. Top radiator and run until hot, then fill reservoir with your 50/50 mix. Let cool down for 8 hours. Top radiator and add to reservoir until a few inches above low line. Run engine again until hot and let cool down overnight again. Then top radiator again if needed. If radiator full just add coolant to reservoir low line or touch above. Keep repeating until no coolant needed in radiator and holds low line in reservoir. Keep in mind, on a very cold mornings coolant will be lower in reservoir (radiator full). A warmer morning coolant will expand and be a little higher. Once burped, if system holds coolant level your good. Check coolant often, It should never use coolant.
These rust remove wheels work nice for cleaning off old gasket. The medium would be safer, then this Extra Coarse.
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Click on Snowy in my signature for more tip on timing belt job..