Crankshaft/Camshaft seals w/ TB change?

[DavidAlexander]

I know that timing belt changes are a common issue/post but I haven't been able to find a final verdict on this issue by searching.

Do I need to change my Crankshaft seal and Camshaft seals when I do my water pump/ TB / drivebelt change? Should I wait and see if they are worn/damaged/leaky? I am headed off in a minute and the seals are the last parts I need to start the job if I am going to do them. My 4runner is a 3.4 with 130,000 miles. Thanks. D

[Nuthuts96]

i left the cam pulleys and the crank pulley alone when i did the timing belt last july. i figure i'll deal with the seals next time, behind said parts, right? (along with the idler pulleys). - ok, just remembered the FSM said something about inspecting them- i did not (other than visual with pulleys torqued), and didn't see anything leaking below them... hope that helps.
[img width=565 height=800]http://i223.photobucket.com/albums/dd35/scottnabbie/timingbeltreplacement.jpg[/img]

[MTL_4runner]

I replaced mine when I swapped in the used motor and they had a little life left when I did, but honestly if you're gonna keep the truck a long time, them I'd go ahead and do them anyway. Pay close attention to how far the seals are seated (esp the crank seal, most people drive them in too far).

[DavidAlexander]

Thanks for your info. I decided to just pick them up at the dealership since I won't be able to see them until I get the timing cover off and I would rather just do the work of getting to them once. Thanks again.

Anyone know what the service life of these seals is?

[MTL_4runner]

Anyone know what the service life of these seals is?

Typically a dealership will replace them during a timing belt change if they are leaking. Hard to say how long they will go and that would depend on alot of factors (engine temps, environment, oil quality, etc). They are cheap to change yourself so I just go ahead and do it so I don't have to waste time tearing down stuff and change them in between timing belt changes.