[86_sports_1jz]

if i'm looking at my back main seal how can i tell it is bad? will it be leaking oil? how about the front main seal? will it also leak oil? too see the front main seal i have to remove the crank pulley and timing cover right? is there anyway to tell w/out taking all that off? even if the seals still look okay should i go ahead and replace them while the engine is not in the car yet?

 

[OneJoeZee]

even if the seals still look okay should i go ahead and replace them while the engine is not in the car yet?

Yes. Better to go ahead and do it now and know your seal is brand new.

Would suck to have to do $500 in labor down the road for a $15 dollar seal

 

[86_sports_1jz]

alright thanks

 

[zoonwen]

Listen to joe =D replace both main seals before you put the motor in. Both me and my brothers rear main seals started to leak shortly after both our swaps.

 

[annoyingrob]

I didn't swap the rear main seal when I did the clutch, now it's leaking, and I have to take the tranny out again to do it.

 

[Turbosidosis]

Shouldn't you use dyno oil to seat the seals. I was wanting to use a semi synthetic and then full synthetic, but I havent changed my seals, so now I'm not sure what I want to do.

 

[86_sports_1jz]

alright thanks. is it pretty easy and straight foward to do? what do i need to know b4 if do change them?

 

[annoyingrob]

rear main seal requires pulling the flywheel off, popping the old seal out, and pushing a new one in. The front main seal requires removing the crank pully, and the timing gear IIRC.

 

[Booter22]

i swapped my seals when i put my motor in... but the rear leaks anyways... i dont want to pull the tranny :-(

 

[86_sports_1jz]

okay thanks