7.3 rebuild time - Ford Powerstroke Diesel Forum
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Old 01-15-2012, 09:59 AM
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7.3 rebuild time

Thought some of you might be interested in what my "other" project is ...

Everything started from this thread here
Shudder, low on power, tons of new parts, still issues










I've been having a lot of smoke/stumbling issues. After troubleshooting/diagnosing we thought that we had some torque converter issues, and a bad injector. With 240k miles on the truck, and having all original stuff still, I decided to do the maintenance and do everything. 8 new injectors, and a new torque converter, rebuilt trans later, it was still there.

:bigcry:

I was done messing around and took it to Ford Dealership to have them do a compression test.

cylinder 8 had ZERO (0) compression. They are supposed to be around 340-360psi. Well that's not good..

Truck was still driveable so I left the dealership after they told me it was going to cost $15,000 to fix it. (new engine/labor) Took it to my buddies shop who helped with the injector install and a diesel guru.

We had the old 7.3 motor out of the truck in 5.5 hours, and torn down in 3-3.5 hours.

Cylinder 8 had some nasty scratching/scoring in it. We figured the rings had seized to the piston, and just scored everything up. The block and cylinder heads are at the machine shop getting prepped for work, and waiting to find out how far we are going to overbore it (.010, .020, etc) so I can order the Ford OEM rebuild kit, forged rods, and ARP head studs.

The truck will also be getting some other nice diesel upgrades. (exhaust, tuner, gauges, etc)

Should be a MONSTER when we are done. :evil:

I'll keep this updated as I keep getting parts/pictures

Last edited by 99Mpower; 01-15-2012 at 10:13 AM.
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Old 01-15-2012, 12:44 PM
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awesome looking forward for this build
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Old 01-15-2012, 05:28 PM
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Sounds like it will be a sweet ride when done...Any idea what kind of HP and TQ numers will be coming out of it when you're done?

I've been looking at trucks, but can't decide between the 7.3 or 6.0
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Old 01-15-2012, 05:37 PM
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Subscribed should be an awesome build
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Old 01-15-2012, 05:39 PM
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Sweeeeeet. Good luck with everything

Sent from my DROID3
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Old 01-15-2012, 09:11 PM
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Subscribing...

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Old 01-15-2012, 09:56 PM
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Just a thought

I am stuck on why it was cyl # 8 -- was there any evidence of overheating that particular cylinder (ie valves/valve seats cooked etc?) - just wondering since I know that 8 is firing right after #6 and thus doesn't always get the same oil/fuel charge - might have run it lean and thus hotter than usual.

You said you are getting gauges, did you happen to have an EGT gauge prior? If so, did you ever see any abnormal spikes?

Turbo not dusted or missing any pieces?

Did you run synthetic or regular oil?

Its quite early to be doing a major teardown on your engine, just wondering what might have caused it... (And how to avoid it myself :-) )

Those were my knee jerk questions, wondering what you think was responsible/contributed to the early failure...

Best of luck - definitely subscribed and sounds like you are off to a good start!
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Old 01-16-2012, 02:04 AM
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Good luck with the build.
What is your time frame till you will have it back driving.

Looking forward to seeing the end results.
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Old 01-17-2012, 03:48 AM
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cylinder #8 requires a sleeve...

AlaskanEngineer, you were right with the detonation issue. The injector must of went out, and drove it for too long before finally getting it fixed.

Definitely has been expensive, (burned a hole in the CC yesterday at RiffRaff), but it should be amazing when I'm done
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Old 01-17-2012, 06:56 AM
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Would finding a bare block in any kind of decent shape (better than what happened to #8) maybe cost less than having yours machined for a sleeve?

Best of luck on it, man!
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