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Old 05-06-2007, 05:14 PM   #1
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Can anyone provide me the correct spark plug torque for the plugs in the 8.1L GM engine used in our Workhorse W22 Chassis? Thanks, Rick
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Old 05-06-2007, 05:14 PM   #2
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Can anyone provide me the correct spark plug torque for the plugs in the 8.1L GM engine used in our Workhorse W22 Chassis? Thanks, Rick
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Old 05-06-2007, 06:18 PM   #3
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Orginal's - 41-983

UltraPower - 41-932
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Old 05-06-2007, 06:23 PM   #4
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by oemtech:
Orginal's - 41-983

UltraPower - 41-932 </div></BLOCKQUOTE>

Is that part #'s or torque specs???
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Old 05-06-2007, 06:39 PM   #5
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Dale, getting ready to put in the 41-932's. Still looking for the torque specification. Rick
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Old 05-06-2007, 08:12 PM   #6
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by rickandcheryl:
Dale, getting ready to put in the 41-932's. Still looking for the torque specification. Rick </div></BLOCKQUOTE>I installed so many plugs in my lifetime that I just know when to stop yanking on the wrench.

Few mechanics will torque a spark plug. But I'm sure the number is in my service manual so I'll check it out tomorrow.
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Old 05-06-2007, 08:16 PM   #7
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I have been changing plugs for years and here is how I do it and never had a problem
1) gap the plug with a "wire" gapping tool
2) add some never seize to the threads
3) install the plug until the seat bottoms and the add no more than a 1/4 turn.

Besides you would have to use an "inch lbs" style torque wrench as a regular one would not fit (to big).
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Old 05-07-2007, 03:04 AM   #8
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What is the difference between the two plug numbers? 41-983& 41-932. Which one is best to run in a stock engine?
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Old 05-07-2007, 04:53 AM   #9
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The difference is 51

The 41-832 is a colder plug and is gapped at .045. The original plugs are gapped at .060.

The AC Delco plugs are the preferred plug versus Denso's that some engines have factory installed.
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Old 05-07-2007, 11:28 AM   #10
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by rickandcheryl:
Can anyone provide me the correct spark plug torque for the plugs in the 8.1L GM engine used in our Workhorse W22 Chassis? Thanks, Rick </div></BLOCKQUOTE>From the Service Manual

Installation Procedure
1. Properly position each spark plug washer.
2. Inspect each spark plug gap. Adjust each plug as needed.
Specification
Spark plug gap: 1.524 mm (0.060 in)
Notice: Refer to Fastener Notice in Cautions and
Notices.
3. Install the spark plugs.
Tighten
For (IRON Head-all Subsequent Installations)
tighten the spark plugs to 20 Nm (15 lb ft).
For new iron heads tighten the spark plugs to
30 Nm (22 lb ft).
4. Install the spark plug wires. Refer to Spark Plug
Wire Replacement.
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Old 05-07-2007, 04:32 PM   #11
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Full-Timers: </div></BLOCKQUOTE>
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Old 05-08-2007, 12:08 AM   #12
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Rick, with the UP you can gap plugs at .045.
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Old 05-09-2007, 06:26 AM   #13
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Put in the 41-932's, not a job I would want to do everyday! Kinda tight in there, although the hard part was getting the Taylor wires off, man, those suckers hold the plug tight! Gapped the new plugs to .045, a little anti-seize and the new plugs went right in and torqued to about 20ft. lbs. (where I could get the torque wrench). Took about an hour total and the engine fired right up and ran smooth. Went so well that I even went and put new plugs in the gererator. Rick
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