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| 1999 to 2003 7.3L Power Stroke Diesel 7.3L Power Stroke Diesel equipped Super Duty and Excursion. |
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#1
Mon, March 14th, 2011, 10:41 PM
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Dang Dave, sucky. I think I'd still give up my left leg to get your pickup, even with the hurt engine, lol. Just had another thought after reading which cylinder it was on PSN. Maybe between the partially filled block, long towing trip, no.7 cylinder(possibly hotter at the back) the engine just got to hot? Is the scuffing up the entire piston or just the lower part of it?
I also read you thought the cooling jet was restricted, anymore checking into that jet or the jet(s) on the other cylinder(s) with bad leakdown?
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Thomas H. '97 F-250 CCSB 7.3L Auto, Gauges, Modded H2E, 285/200% sticks, 7.3L IC, Stealth Dual HPOP, Pheonix chip '03 F-250 CCSB 6.0L Auto, Gryphon CTS, FICM tuning by PHP, Powermax 
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#2
Tue, March 15th, 2011, 03:40 AM
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The scuffing was only on the skirt and predominantly on the "power" side of the piston.
There is definitely a few variables here, the oil jet was restricted for sure - I could barely blow through it - while the rest were no problem to blow through. It is possible the EGT gauge was reading incorrect, I have always suspected this after switching to my newer gauges - seemed to read a bit on the cooler side. Being the rear cylinder it is going to be subjected to a tad more heat, and the filled block brings up a few more suspicions, but #8 cyl. was fine - so that idea is shut down.
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#3
Tue, March 15th, 2011, 04:23 PM
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Are the bores round? Did you bore them or hone them after the hard-block set? Line bore should also have been done after as well.
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F250 Reg Cab - 1,172 HP / DJ# / 11.56 Fuel Only / 10.94 Nitrous / Dyno Run 10-2009 -------------------------------------------------- Wide Open Performance - Engine, Chassis Build Swamps Diesel Performance - Injectors & IDM Gearhead Automotive Performance - Stage II Cam
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#5
Tue, March 15th, 2011, 08:30 PM
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Did you check the bore since the pistons came out? Are they still round?
__________________
F250 Reg Cab - 1,172 HP / DJ# / 11.56 Fuel Only / 10.94 Nitrous / Dyno Run 10-2009 -------------------------------------------------- Wide Open Performance - Engine, Chassis Build Swamps Diesel Performance - Injectors & IDM Gearhead Automotive Performance - Stage II Cam
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