It was a Fram and the oil was Shell 5-20 semi-synthetic. the oil pressure on this engine has always been above "normal" and it has never used a drop of oil between changes.

 

Do you plan to use the same service resources for this new engine?

 

I didn't use just one resourse since I travel alot and hit different cities when I need an oil change. I will probably stick with the 3,000-4,000 between oil changes.

 

Pappy,
Sorry about your premature engine problem. I am curious about your rear axle ratio ? ( it is not in your sig ) .

 

It's a stock 4:10.

 

Pappy,
The RPMs you mentioned seemed a bit excessive to me (when I compare with mine ).
Your truck is listed for 12,500 lbs trailer towing ( 2008 F-250/350 SC 4x4 V-10 both 4.1 and 4.3 rear ratio ) and you are way under that .


"I have towed a 10,000# bumper pull trailer for at least 50,000 miles of the 145,000 total, including many mountain pulls where the engine was reving 4,800-5,500 for long periods of time"


I tow my 5'er loaded approx. 11,500 lbs. On 6% or better hills, I am usually at 4th gear climbing with 3200 RPM (without racing with anyone ) . Occasionally I end up behind a slow moving 18-wheeler and gear down to 3rd with 4300 RPM (rarity ) . This is my 2-valve engine with lesser HP.


Of course there is no way of knowing if long periods of high RPM has anything to do with the engine failure . It just drew my attention that is why I mentioned .
I wish you best of the luck with your new engine .

 

I have the Mike's 5 Star set at 89 performance/tow and plan on keeping it set that way on the new engine. With my bumpers, tool box and TransferFlow 47 gallon tank, my truck weighs in at 8480 lbs. I really don't understand why my engine went south but stick happens. I'm looking forward to seeing how this new engine compares to the old one.

 

I'm with Wolfboro- 4,800rpm appears to be the culprit. Wolfboro was getting at the "how-why" aspect: but I'm more curious "why you'd run it like that."

I don't mean any disrespect at all (anyone name Pappy is probably my elder, so please don't take this wrong)- but what in the world would make a person think that extended periods of 5,000 rpm would/could be acceptable?

I bet our V10 crankshafts weigh a hundred pounds, plus the piston assemblies, torque converter etc.

I'm surprised more stuff hasn't broken.

 

These engines are made to run at those rpms. That's their work load. Otherwise they are worthless as a tow engine.

 

The maintenance is obviously not the culprit and higher RPMs don't generally eat crank/connecting rod bearings unless you have low oil psi. The stock gage is basically a dummy light, 8psi or 90psi it will read good. I have guesses why it failed and none of them are your fault, well very few of them anyways LOL. Good luck with the New engine it's sounds like it's going to have an easer life then my trucks has. Want to test the truck? Let a grain/livestock farmer loose with it.

 

Yup, redline is somewhere in the 5200 range IIRC. 4800 is high, but certainly within the design specs. I don't think that was the problem here.

Pappy: are you gonna do any kind of "root cause analysis", or just install the new engine and move on?

Any chance you could at least get your hands on the oil filter, cut into it, and see if there's any clue there?

 

Running any machine at 90% of maximum speed is certainly not within design specs.

And pulling 18,000lbs (at that rpm) for extended periods of time? ... Recipe for disaster.

 

"Any" is an "Absolute" ~ Operating @ 90% of Redline is exactly what "Extreme-Duty" and/or "Marinized" Marine-Engines do all-the-time!

Granted this isn't a "Marinized Engine" application, and the loading described is definetly "Heavy-Duty"... : ?

Ahmen the passing ~ Good Luck with Your NEW ENGINE!

 

Found out today that poor truck had major surgery.....lifted the cab due to the welded on front bumper. The service dude sent me a picture. Makes me sick. I sure hope I don't wind up with a rattle trap and half my external lights not working.

 

I'm jumping in again....

$7500 for an engine!!!!

Holy crap. You can't find a rebuilder that will go easier on you.
Unless you are keeping this truck forever, or make a good salary using this truck, how do you justify that cost. Now what is the requirements of this warranty. Dealer oil changes or what. Does it cover labor. It better. Then once you get this engine, it's no mercy. Only 3 year warranty, Not that great. In 3 years you're only halfway to this issue again. It's better than a rebuilder though.

Big dilemma.
I'm hoping this isn't what's wrong with my truck.