Left out oil bypass valve
 

My friend just recently rebuilt his T2 engine. Now he tells me that he might have left out the oil bypass valve. He didn't tell me why he thinks this. But, he has good oil pressure. How can he tell if he actually left it out without disassembling the front stack.

thanks guys

unless you can see thru steel/iron aluminum, something needs to come apart

What would be the consequences of running the engine without the oil bypass valve installed?

Bearing failure likely.

chock the clutch down and pull the front pulley bolt.. simple

Doesn't he have to pull the front cover first?

No...what are you calling an oil bypass valve? The one located underneath the bolt which secures the pulley hub to the eccentric shaft? Or...the oil cooler pressure relief located at the bottom of the front cover?

It is the one that is located in the eccentric shaft. My friend says that he found an OEM style oil bypass valve laying on the floor under his work bench and he isn't sure if he replaced it. I'm not sure of the whole story. He didn't elaborate and I didn't ask.

I wouldn't take the chance. If it's not in there, the rotors will starve for oil. Hold the clutch down and remove the front pulley bolt. You'll know pretty quickly if it's there or not.
Make sure your clutch hydraulics are in good condition because if you lose clutch pressure you'll have to pull the front cover and re-do the front stack.

Thanks. That's what I tried to tell him but he wanted me to run it by you guys.

Thermal pellet? Or oil jet? You don't necessarily HAVE to replace them when you rebuild. As long as it wasn't smoking heavily prior to rebuilding. If he removed it from the e-shaft to clean the passage and didn't reinstall it then it will just smoke like a freight train. It's basically like a carburetor jet limiting the amount of oil into the engine.

The pellet was in place. He had swapped out the OEM pellet for the new aluminum one. Only took like 15 minutes to remove the bolt, check the pellet and re-torque the bolt.

not a biggy and now you know,, and i bet it was worth the effort to be SURE.. your mate did the right thing by letting you know when he did..