Spark plug gapl

[Bobbo01]

Hello,

I'll be changing out my plugs on my 96 four winns with a 5.7Gl volvo penta engine . I'm going with Ac delco that the volvo penta plug number is interchangeable with.. It also says I can use a champion plug.Question is I've seen 3 diffrent gap numbers..A online manual shows .060. The ac delco plugs preset at .040. And I've seen where it says. 035 was the gap for the champion plug. I font believe my sticker is on the flame arrestor to go by that. Can someone confirm exactly what's the correct gap setting?


Thank you
Robert

 

[alldodge]

Should be .045 but would be better with a serial number

 

[Bobbo01]

Thanks Alldodge, Now that's a different number I've heard.lol..I'll look for a serial number. Wou li d it be the numbers that is on a silver p km ate on valve cover?

 

[alldodge]

Thanks Alldodge, Now that's a different number I've heard.lol..I'll look for a serial number. Wou li d it be the numbers that is on a silver p km ate on valve cover?

Yes, its the longer number
One is on top and is maybe 7 or 8 digits, but serial number is longer

 

[Bobbo01]

Ok..I found model and serial number..model is 572Bpnc5.....serial number is T01295511. Hope this helps..Also can you provide part number for a time up kit for sierra so I can order on from hear.Thanks in advance.. Also I bought AC-MR43T plugs.They are pre gapped to .040 which I don't think is right..Thank you

 

[alldodge]

Those numbers are not coming up in the search

I'm using a 99 Merc 5.7 for reference and it uses MR43LTS and gap at .045. The MR43T where used on non-vortec motors and gap is .035

Yours being a GL but don't know which (A or B or C or ...)
VP is showing 21467472 and older number is 3858996

The numbers are Iridium plugs which cross to AC 41-993 or Champion RA12PYP or cross to NGK
Its recommended to not regap Iridium plugs because they are so easy to be damaged

https://www.sparkplug-crossreference.com/convert/AC_DELCO/41-993