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04-24-2019, 09:27 AM
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#1
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Senior Member
Join Date: Oct 2010
Location: blank
Posts: 147
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ACDelco 41-983 spark plugs
Hitting the 40K on the second set of spark plugs on my stock 05 8.1.I purchased the above plugs from Norman engineering many years ago they are at 0.60 gap should they be at 0.45 ? silver anti-seize ok to use ? thanks in advance.
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2005 Itasca 33V Sunrise 8.1 Workhorse W-20
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04-24-2019, 09:28 AM
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#2
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Senior Member
Join Date: Feb 2003
Location: Jarrell, TX 76537
Posts: 4,501
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Yes and Yes
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Dale
AKA - Oemy
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04-24-2019, 09:37 AM
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#3
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Senior Member
Join Date: Oct 2010
Location: blank
Posts: 147
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plugs
Thank you Dale for the quick reply.
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2005 Itasca 33V Sunrise 8.1 Workhorse W-20
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04-24-2019, 09:48 AM
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#4
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Aug 2002
Location: Clovis, CA, USA
Posts: 13,151
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Have you replaced your air filter and cleaned your MAF?
Have you changed your plug wires?
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2004 Monaco La Palma 36DBD, W22, 8.1, 7.1 MPG
2000 LEXUS RX300 FWD 22MPG 4020 LBS
Criticism is easier than Craftsmanship
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04-24-2019, 09:57 AM
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#5
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Senior Member
Join Date: Oct 2010
Location: blank
Posts: 147
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plugs
Morning Arch, yes put on maxum wires with the last set of plugs been working great,the air filter and fuel filter & MAF cleaned about 4k ago. sure appreciate all the great help on this forum. 
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2005 Itasca 33V Sunrise 8.1 Workhorse W-20
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04-24-2019, 10:30 AM
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#6
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Senior Member
Join Date: Mar 2017
Location: Alaska in Summer Snow Birds in Winter
Posts: 2,073
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Why would you chose the 41-983 over the 41-101? Are the 41-983's iridium plugs?
Not trying to start anything, I'm just curious. I thought the 101's were the preferred plug for the 8.1L
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Tom and Sherry W.
06 Winnebago Adventurer 38J Workhorse W24 Lots of motor and suspension mods in the works
02 Itasca Suncruiser 35U. Workhorse W22 w/Safe-T-Plus, Koni FSDs, UltraTrac, etc, etc.
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04-24-2019, 10:44 AM
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#7
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Senior Member
Join Date: Oct 2010
Location: blank
Posts: 147
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plugs
AKIQPilot,I purchased "magnum" wires & air,oil,fuel filters from Norman several years ago the plugs 41-983 iridiums is what Norman sent.Was checking on the plug and gap.To see if anything has changed. 
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2005 Itasca 33V Sunrise 8.1 Workhorse W-20
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04-24-2019, 01:08 PM
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#8
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Senior Member
Join Date: Feb 2015
Location: Grapevine, Tx
Posts: 5,635
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The 41-983 is a platinum plug, not an iridium plug. 41-101 is the iridium replacement.
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2004 Fleetwood Southwind 32VS W20 - SOLD!
ReadyBrute Elite towing a 2017 Ford Edge Sport
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04-25-2019, 07:24 PM
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#9
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Registered User
Join Date: Aug 2016
Location: Seattle,WA/HB,CA./Fujieda-Japan
Posts: 849
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Copper anti-seize on plugs.
Iridium plugs work best on coil over ignition systems.
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