Cylinder Numbering on a 7.3L? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 6 (permalink) Old 07-31-2007, 12:15 AM Thread Starter
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Cylinder Numbering on a 7.3L?

Is the #1 cylinder on the driver's or passenger's side? The factory service manual says the following, but it could be treating right/left from the point of view of the driver OR the guy standing at the front of the truck looking at the engine.

The right bank cylinders are numbered 1, 3, 5, 7, with number one being at the front of the cylinder block. The left bank cylinders are numbered 2, 4, 6, 8. The firing order is 1-2-7-3-4-5-6-8.

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Michael Pliska

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post #2 of 6 (permalink) Old 07-31-2007, 01:27 AM
 
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The even numbers are on the driver's side from front to back: 2,4,6,8. And the odd numbers are on the passenger side from front to back: 1,3,5,7.

The firing order is 1-2-7-3-4-5-6-8 also

-Michael
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post #3 of 6 (permalink) Old 07-31-2007, 07:52 AM
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The right side is always the pass side and the left side is drivers side.

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post #4 of 6 (permalink) Old 07-31-2007, 04:30 PM
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What are you looking for now michael? Order AE?

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post #5 of 6 (permalink) Old 07-31-2007, 04:55 PM
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Quote:
Originally Posted by Dieselfever
The even numbers are on the driver's side from front to back: 2,4,6,8. And the odd numbers are on the passenger side from front to back: 1,3,5,7.

The firing order is 1-2-7-3-4-5-6-8 also

-Michael
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post #6 of 6 (permalink) Old 07-31-2007, 07:07 PM Thread Starter
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Quote:
Originally Posted by CSIPSD
What are you looking for now michael? Order AE?
I tested the resistance to ground for each injector circuit (read this somewhere about a TSB or something which suggested this as a test for one type of pending failure of the UVC wiring). I found infinite resistance (i.e., good insulation) on all even-numbered cylinders, and ~4.0k-ohms on all odd-numbered cylinders. While that is theoretically only 27 mA of leakage current, I suspect that there may be more of an insulation breakdown when the voltage is applied. The thing that threw me was the passenger's side being #1 cylinder, being used to GM V8's all my life!

I ordered Autoenginuity from ITP, should be here tomorrow. Also borrowing a SD IDM to try. I figure I'll replace the passenger's side valve cover gasket and UVC harness while I wait for AE and the IDM to arrive, just to eliminate it as an issue.

Thanks,
Michael

ISSPRO Engineering Manager

1995 F350 PSD Crew Cab Dually, 271k miles
10 ISSPRO Prototype Performax™ gauges in Pillar & Overhead pods & sitting on dash, Tymar Intake, Gutted EBPV, Tymar 3x4" downpipe, Tymar 5" exhaust, Cat's hiding in the shed, Baby Swamps, Swamps tunes, Tricumulator springs and Accumulator Valve, Tru-Cool 4590 Trans Cooler, Lock-Right Locker
1998 S&S 9.5' slide-in camper
32' enclosed tag trailer with 2 drag cars (73 Vega Super-Gas & 74 Vega ET Super-Pro)
1992 GMC Typhoon, 1973 Chevy Blazer with Pontiac 400, 1973 Trans-Am 455
2000 VW Jetta TDI - Kerma tune, Der Chimera Stage II Clutch
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