Engine/Transmission (1998.5 - 2002) '02 scuffed #6

[krtcummins]

That's why I always shake my head when I see these guys who turn up their fueling boxes so the engine blows huge amounts of black smoke. That in itself will wash cylinder walls and create piston skirt damage. Let alone what it will do to the bearings if you don't drain out the fuel contaminated oil! But,,,,I guess it looks cool huh?

 

[CAPTPHIL]

Can some one explain the way splash cooling works as opposed to gallery cooling.
Thanks Capt Phil

 

[Sticks]

That's why I always shake my head when I see these guys who turn up their fueling boxes so the engine blows huge amounts of black smoke. That in itself will wash cylinder walls and create piston skirt damage. Let alone what it will do to the bearings if you don't drain out the fuel contaminated oil! But,,,,I guess it looks cool huh?

White smoke = bad. Black smoke, not great but not an engine killer either. More likely to suffer turbo failure or carbon buildup in the cylinder before piston failure. Gotta look at the number of 1st and 2nd gen smoke monsters out there that are still running strong with no problems.



Combination daily drivers and drag/sled pullers with lots 'o miles on them.

 

[RustyJC]

Can some one explain the way splash cooling works as opposed to gallery cooling.

Thanks Capt Phil

The VP44 24 valve engines used spray cooling from piston cooling nozzles. See the last entry on page 10 HERE. If a nozzle got plugged, you could destroy a piston like the damage shown in short order as the piston would overheat, grow and lose piston-to-cylinder clearance - this was the source of one of the Fram filter warnings as some of the "rubber" used in the Fram filters was breaking up and could lodge in a piston cooling nozzle.



Rusty

 

[Sticks]

The VP44 24 valve engines used spray cooling from piston cooling nozzles. See the last entry on page 10 HERE.



Rusty

Same as 12v engines. Don't have an answer as to why it works better than gallery.

 

[cerberusiam]

Can some one explain the way splash cooling works as opposed to gallery cooling.

As shown, the oil is spraye don the bottom of the piston to cool it. With galler cooling, there are either inserts with passages or voids in cast in the piston that allow oil to be circulated much closer to the heat source and with much greater surface area to limit the heat soak of the piston.

Don't have an answer as to why it works better than gallery.

Short answer is it doesn't. Gallery cooling is much more efficient at cooling the hot spots on the piston, chiefly bowl and top ring, to minimizing damage from heat soak.

 

[Dieseldemon]

My bet is #6 piston cooling noz but change all of them

 

[WestTN]

Don't forget the prohibition of Fram 'engine killing' filters. That loose RTV crap floating through the oil gallerys to plug the #6 cooling nozzle, or the piston coolin jet falling out.

 

[Bob Wagner]

bomber bump... ... .

 

[bsappington]

Pre gallery-cooled 24-valves can take a heck of a beating provided you keep the EGT in check. No need to switch to gallery-cooled pistons IMO.



I am thinking dkemy's #6 somehow got a chunk of debris thrown up that got wedged between the piston and cylinder wall that chewed it up? I have never seen a scuffed piston where the crown shows no sign of overheating. Also notice it seems to just be on one side but can't tell for sure without more pictures.

Hey Vaughn,



A siezed piston ring will do that.



Ben

 

[Dieseldemon]

Be sure and change all the piston cooling nozzles. Either Heat Or Piston cooling nozzle caused it.