TC&Z
USA
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Joined: 08/24/2004
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Hi, we have a 2007 Winn with a gas 8.1L Vortec engine. I want to replace the spark plugs and wires. According to the manual I am to use AC Delco 41-983 plugs. Yet when I check NAPA, Advance and O'Reilly's, all 3 claim these do not fit and list others. Yet all 3 do carry them. Worse, one store lists one the fits that the other says does not, and vice versa.
Further, I check the Workhorse parts site, they say should be AC 41-101, yet none of the stores say that, yet do carry them. What a mess...
Should I heed the manual says and ignore the store fit claims?
Should I heed the Workhorse site even though the stores disagree, and does not match the manual?
Or should I heed the store's advice? Even then not sure how to pick which one? Plus do I use the gap out of the box or adjust?
Any inputs would be appreciated, maybe they do this so we won't try to change them ourselves, argh... ![[emoticon]](http://www.rv.net/sharedcontent/cfb/images/scratchead.gif "scratchead")
TC&Z
2007 Winn Voyage 38J, gas 8.1L engine
2018 Jeep Cherokee flat tow
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enblethen
Moses Lake, WA
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Joined: 01/05/2005
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Try looking on Rockauto.com
Look under 3500 pick up 8.1
Autozone
What Workhorse chassis do you have?
Bud
USAF Retired
Pace Arrow
2003 Chev Ice Road Tracker
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KD4UPL
Swoope, VA
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I would trust NAPA but not he other stores.
However, I'd go by the GM manual before I listened to anyone in a store.
The gap should be listed under the hood or somewhere in the vehicle or the manual. I wouldn't just assume the gap was right out of the box.
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wildtoad
Blythewood, SC
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Joined: 06/05/2011
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Quick question: what plugs are in it now?
Tom Wilds
Blythewood, SC
2016 Newmar Baystar Sport 3004
2015 Jeep Wrangler 2dr HT
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Rocky2
Ventura, Ca.
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Joined: 01/14/2004
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I had the 8.1 years ago. I replaced the wires with Taylor and the plugs with AC Delco 41-101 Iridium spark plugs, gapped at .45, not .60.
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enblethen
Moses Lake, WA
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Joined: 01/05/2005
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I trust my own searching before my local NAPA store. They barely have a computer system.
Napaonline.com maybe a better place to check.
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ernie1
Sacramento,California,USA
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Joined: 02/10/2004
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Uhhhh why not call your local Chevrolet dealer?
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enblethen
Moses Lake, WA
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What Workhorse chassis makes a little difference. Some have 7.4 and others 8.1.
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Bruce Brown
Northern NY
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KD4UPL wrote:I would trust NAPA but not he other stores.
However, I'd go by the GM manual before I listened to anyone in a store.
The gap should be listed under the hood or somewhere in the vehicle or the manual. I wouldn't just assume the gap was right out of the box.
I wouldn't trust our local NAPA with a bottle of windshield washer fluid. Our local Autozone is excellent.
Honestly, I trust myself the most.
There are 24 hours in every day - it all depends on how you choose to use them.
Bruce & Jill Brown
2008 Kountry Star Pusher 3910
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chuckftboy
Fleming Island, Florida
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Generally there several plugs that will probably work fine for the same engine but if it were my coach, I would pull 1 plug and shop for that same number plug and eliminate any guess work
2019 Horizon 42Q Maxim Chassis w/tag
Cummins L-9 450 HP / Allison 3000
2006 Jeep TJ and 2011 Chevy Traverse Tows
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