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Open Roads Forum  >  Class A Motorhomes  >  Maintenance Issues & Tips

 > Spark Plug Confusion ??

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TC&Z

USA

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Posted: 02/19/21 04:07pm Link  |  Quote  |  Print  |  Notify Moderator

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]


TC&Z
2007 Winn Voyage 38J, gas 8.1L engine
2018 Jeep Cherokee flat tow

enblethen

Moses Lake, WA

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Posted: 02/19/21 04:24pm Link  |  Quote  |  Print  |  Notify Moderator

Try looking on Rockauto.com
Look under 3500 pick up 8.1
Autozone
What Workhorse chassis do you have?


Bud
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2003 Chev Ice Road Tracker


KD4UPL

Swoope, VA

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Posted: 02/19/21 04:34pm Link  |  Quote  |  Print  |  Notify Moderator

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.

wildtoad

Blythewood, SC

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Posted: 02/19/21 04:39pm Link  |  Quote  |  Print  |  Notify Moderator

Quick question: what plugs are in it now?


Tom Wilds
Blythewood, SC
2016 Newmar Baystar Sport 3004
2015 Jeep Wrangler 2dr HT

Rocky2

Ventura, Ca.

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Posted: 02/19/21 04:47pm Link  |  Quote  |  Print  |  Notify Moderator

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.





enblethen

Moses Lake, WA

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Posted: 02/19/21 05:02pm Link  |  Quote  |  Print  |  Notify Moderator

I trust my own searching before my local NAPA store. They barely have a computer system.
Napaonline.com maybe a better place to check.

ernie1

Sacramento,California,USA

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Posted: 02/19/21 05:07pm Link  |  Quote  |  Print  |  Notify Moderator

Uhhhh why not call your local Chevrolet dealer?

enblethen

Moses Lake, WA

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Posted: 02/19/21 05:48pm Link  |  Quote  |  Print  |  Notify Moderator

What Workhorse chassis makes a little difference. Some have 7.4 and others 8.1.

Bruce Brown

Northern NY

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Posted: 02/19/21 05:49pm Link  |  Quote  |  Print  |  Notify Moderator

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


chuckftboy

Fleming Island, Florida

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Posted: 02/19/21 06:07pm Link  |  Quote  |  Print  |  Notify Moderator

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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