2005 F350 DO I HAVE TO PRIME THE TURBO

No idea how yow you would "prime" the turbo. It just spins on it's own as the gasses flow over the vanes. JMHO

prime it

I think he means turn it over without firing it up to pump oil into it..

Did you "rebuild" it or clean it up? If you truly rebuilt it then you know it needs oil before it starts spinning.

No, it's not common to do so. The turbo will fill and pressurize with oil in about a second.

I've done it both ways.

Both work so I stopped priming them a long time ago. Essentially any time you start an engine with a turbo, it is started dry anyway. Connect the oil line up and light it off.

When changing turbo's you should add oil to the supply line hole and spin it by hand so the bearings are fully lubricated.

I use a socket on a breaker that fits the turbine nut on the intake side. While using the socket on the nut, I have someone else start the truck, I keep the turbo from spinning for about 30 seconds. This allows oil pressure to build and fill the galleys on the turbo without spinning, then let it go.

eHoefler wrote:
I use a socket on a breaker that fits the turbine nut on the intake side. While using the socket on the nut, I have someone else start the truck, I keep the turbo from spinning for about 30 seconds. This allows oil pressure to build and fill the galleys on the turbo without spinning, then let it go.

If you do this I recommend shutting the engine down after the 30 seconds and not removing the socket until the turbine quits trying to spin. I wouldn't want to take a chance on the socket slipping off the breaker and bouncing around in there.

Pre-lubing during assembly should suffice.

Same as ehoefler. I make SURE it's oiled