Got A Little Engine Clatter
Thread Starter
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Fleet Mechanic
Joined: Sep 2007
Posts: 1,256
Likes: 6
From: Garden Valley, Idaho
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.
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Fleet Mechanic
Joined: Sep 2007
Posts: 1,256
Likes: 6
From: Garden Valley, Idaho
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.
Thread Starter
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Fleet Mechanic
Joined: Sep 2007
Posts: 1,256
Likes: 6
From: Garden Valley, Idaho
It's a stock 4:10.
Elder User
Joined: Feb 2006
Posts: 545
Likes: 5
From: FL
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 .
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 .
Thread Starter
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Fleet Mechanic
Joined: Sep 2007
Posts: 1,256
Likes: 6
From: Garden Valley, Idaho
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.
Cargo Master
Joined: Apr 2013
Posts: 3,087
Likes: 24
From: Central Florida
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.
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.
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Cargo Master
Joined: Jun 2010
Posts: 2,113
Likes: 4
From: Iowa
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. 
Elder User
Joined: Jul 2005
Posts: 974
Likes: 11
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?
Cargo Master
Joined: Apr 2013
Posts: 3,087
Likes: 24
From: Central Florida
And pulling 18,000lbs (at that rpm) for extended periods of time? ... Recipe for disaster.
Freshman User
Joined: Sep 2014
Posts: 27
Likes: 0
From: At Large... ; )
"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!
Thread Starter
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Fleet Mechanic
Joined: Sep 2007
Posts: 1,256
Likes: 6
From: Garden Valley, Idaho
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.
Logistics Pro
Joined: Jul 2009
Posts: 3,635
Likes: 3
From: Lansdale, PA
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.
$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.