oil pump runs after shut down?

[jimmm]

A friend has a 2005 F 250 that went in for a warrentee turbo replacement. When he got it back they said they reprogramed the computer to run the oil pump a few seconds after shut down to cool the turbo. Or thats what he recalls. You can here something running after shut down, thought the oil pump was mechanical? They add an electric pump? Is it worth the trip to add one?

[chuckles]

both the oil pumps on the 6.0 are mechanical, where would be no way to "reprogram" the PCM to run these pumps. Either your friend was mistaken, or the dealer was blowing smoke.... The best think to prevent "oil coking" on the turbo bearings is to let your truck cool down for at least one minute before shutdown. The exhaust temp should be less than 400 degrees. If you don't have a EGT guage, or a remote "turbo timer" then the easiest, but less convenient thing to do is just let the truck idle for at least one minute, and sometimes up to 2 if you have been driving it hard, then shut it down.

[chuckles]

Maybe they reprogrammed the PCM, and told him to run the truck for a few minutes to let the oil pumps cool down the turbo??

[VeeDubTDI]

Originally Posted by chuckles

Maybe they reprogrammed the PCM, and told him to run the truck for a few minutes to let the oil pumps cool down the turbo??

I think you're on to something here.

[DSLSYS]

Thats what a turbo timer is for, wont let the truck shut down until the egt's are at an exceptable level.

[jimmm]

Originally Posted by DSLSYS

Thats what a turbo timer is for, wont let the truck shut down until the egt's are at an exceptable level.

His truck shuts down, engine stops, but it sounds like a pump is still running.

[rdr99]

Is it the turbo winding down? Can't remember if there was a program to 'buzz' the injectors after shutdown.

[chuckles]

That could be the "buzz" on the injectors. There was a PCM calibration that did that during shutdown, but that's not really anything to do with the turbo.........

[DSLSYS]

Originally Posted by chuckles

That could be the "buzz" on the injectors. There was a PCM calibration that did that during shutdown, but that's not really anything to do with the turbo.........

That could be, if so its a really old program and ineffective.

[jimmm]

I was confused, I thought both oil pump were mechanical, had not seen any after market electric ones and even if there was the dealer wouldnt have put one on free. The sound is louder under the truck, I first thought it was coming from the fuel filter area. But thinking about it, it could have been injectors, hood was closed so the sound could have been directed downward.Why would the injectors be "buzzed"?