SmithvilleD
Active Member
Do also check to ensure oil can freely drain back to the pan also. As stated above, the seals aren't really designed to be an absolute/positive seal, but more so the vast majority of oil follows the easier path (which should be the drain path to the pan).
More than one rebuilt turbo has been installed with the protective plastic drain plug still in the drain. Folks always see/remove the cap over the oil inlet, but the male plug in the drain sets close to flush with the mating surface & gets missed occasionally.
At startup things smoke as it's dumping the oil past the shaft seal into the intake & exhaust paths. There's typically no damage to the turbo or seals - just get the drain path opened up & the turbo works fine.
More than one rebuilt turbo has been installed with the protective plastic drain plug still in the drain. Folks always see/remove the cap over the oil inlet, but the male plug in the drain sets close to flush with the mating surface & gets missed occasionally.
At startup things smoke as it's dumping the oil past the shaft seal into the intake & exhaust paths. There's typically no damage to the turbo or seals - just get the drain path opened up & the turbo works fine.
