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Tool Talk Discussion Forum

Re: O.T. - Engines, Which is Better ?

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State of Jefferson

11-22-2013 12:55:35

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I'm a devout Ford guy.

But I just melted a piston in my 7.3 Powerstroke. If I had an extra $15k sittin around I'd be replacing that engine w/ a newer Cummins, rather than the plan I have to just rebuild what I've got...


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John A.

11-22-2013 15:33:09

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 Re: O.T. - Engines, Which is Better ? in reply to State of Jefferson, 11-22-2013 12:55:35  
St. of Jeff, What was the Chip, Setting, Load, Pyrometer reading when you melted that piston on your 7.3???
John A.

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State of Jefferson

11-22-2013 21:42:35

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 Re: O.T. - Engines, Which is Better ? in reply to John A., 11-22-2013 15:33:09  
Hey John,

Edge tuner.
80 hp setting, I think...
It nudged 1300 for a bit, then I backed out.

I don't think it's a matter of it getting hot this one time. It's been worked pretty hard for the last 120k that I've owned it. Probly some before that...
I have a truck so I can USE it, perhaps a little toooo hard. Expensive lesson, but that's the breaks, nothin lasts forever...


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John A.

11-23-2013 06:10:38

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 Re: O.T. - Engines, Which is Better ? in reply to State of Jefferson, 11-22-2013 21:42:35  
St. of Jeff., It does happen they will let go when worked really hard. I had a neighbor in the Panhandle back in the 80s he had an old COE Pete with and 400 hp 855cid Cummins, after the first rebuilt it was punched out to 435HP when it came out of every rebuild. This was back in the day when a full rebuild kit cost about $1500/$2000 and a weekend of work and a guy was back haulin on Monday/Tuesday
He was a pump twister. As soon as he got his truck from the shop he reset the pump and took a set of pliers and Cut the Pyrometer lead! He would melt down that engine every 18 months or so!, get a new rebuild kit,...3 days later he was screaming down the Boulevard! Guys would ask him what his pyrometer reading was most of the time His usual reply was...What is a pyrometer? He ran the everliving crap out of that old truck. OBYW it had a Turned-around 10 speed in it. H3LL it would run 40 mph in Reverse!
The guy was a Bull-wagon Hand, Been known to have been Clocked and Stopped at 120mph with a full load of Cattle comming out of Tenn. Headed back to the High Panhandle of Texas/Okla.
Anyway sustained high temps will kill a Dsl as fast as anything. It was previous times where the temps went unchecked was where the damage happened, it just happened to be at this time when it let go.
I agree with you a truck is to be used, But if you are pushing it hard, asking it to do more than it is suppose to, the Operators must stay on top of the Gauges, at all times!! Yes, and expensive lesson. I don't think it is the engines fault here. Take care.
John A.

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State of Jefferson

11-23-2013 07:58:32

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 Re: O.T. - Engines, Which is Better ? in reply to John A., 11-23-2013 06:10:38  
Haha! I like to go, and I perhaps expect a little too much out of my mechanical objects, but not to the extreme of your friend...

At least not since I've matured >;-)

I had known that I was pushing the limits on this engine. It can't be faulted for my impatience. I just HATE creeping up some mtn pass doing 30mph, so I push it. Not real likely my habits will change. Much. Rebuild it, it'll go another 200k, by then the body will be junk and it'll be time for a replacement...

Have a good'n!


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