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Old 10-16-2013, 12:27 PM
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Spark Plugs for 2013 Ilmor 6.0

So I have about 100 hours on my 2013 Ilmor 6.0 and while winterizing I am replacing the spark plugs. I went to Napa with the Stock ACDelco 41-110 plugs and they ordered me new ones. When I picked them up this morning they are a different part number, ACDelco 41-962. The guy at Napa said these are the replacement plugs. I am wondering if these are the right plugs to use on this motor? The definitely look different. Anyone here have experience with this?
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Old 10-16-2013, 12:31 PM
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Any reason why you are changing the plugs? MMS did my 100-hour service and all the plugs were inspected.
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Old 10-16-2013, 12:39 PM
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On all my old V-drives, I replaced the plugs after ever 100 hours or once a year. The plugs don't look too bad, but I figure on a boat like this, and for how much we use it, $90 for new plugs once a year seems like a worthy investment. When I called MMS they said the same thing, just inspect them. I figure if I have to inspect each one anyways, might as well replace them at this time.
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Old 10-16-2013, 12:41 PM
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one is the iridium the other is platinum - wonder why this is second post that calls out napa for changing type of plug...
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Old 10-16-2013, 02:04 PM
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So I spoke with my service department and they said that the correct plugs are the ACDelco 41-985. I did some google searches and a few years back, these were replaced by the part number 41-110. But they are in fact the exact same plug.

I also sent an email to Ilmor, but didn't expect to hear back for a while. The responded right away with the detailed information below. Very impressed with the service form Ilmor for that.

Levi,
Our part Num# Mv8v-1192 is the same spark plug# as AC Delco 41-110. That's is the spark plug you need. 41-962 I cannot answer if it is alternate plug. I would not use them, especially if they look different.

Thank You!
Rick


So I'm taking these plugs back to Napa and will just have to get them elsewhere I guess. I'm glad I didn't just "trust" the Napa guy.
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Old 10-16-2013, 03:07 PM
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Good thing you investigated first Levi. Scary that they would just elect a seemingly random plug to sell to you. Was that here in town?
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Old 10-16-2013, 04:31 PM
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Sure was. I even went back in and showed him the two plugs and how they looked different, and he said "ya, they are fine". No biggie though, I found them online pretty cheap if he can't get them.
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Old 10-16-2013, 04:40 PM
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Those guys seem a little sketchy over there sometimes...
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Old 10-16-2013, 08:30 PM
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Eash - ya use that part you'll be fine.. here's your sign...
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Old 10-16-2013, 08:49 PM
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$90 for plugs? I know you guys use monopoly money up there but still that seems high!
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