Spark plugs for '23 Dodge 4 cylinder

[mikeglass13]

O.K., next question:

Regarding proper spark plugs for '23 Dodge 4 cylinder. Current plugs are A.C. with no numbers on them. 7/8" hex and very deep into cylinder head. Found one chart that said use Champion W-10......Hex size and thread pattern is correct, BUT....depth into cylinder head is much shorter.

Anyone have a correct number for replacement plugs?????

Thanks!

Mike

[FMF]

There was a great article in a recent Dodge Brothers newsletter on spark plugs. Last year, I replaced my plugs (for a 1925 4 cyl.) with what was suggested in the publication. I do recall I used Champion and bought them from a local auto store --- believe it was NAPA. They had to order them in - took a day. Unfortunately I'm in the office but will let you know what the Champion number is on Monday.

[brian1925tourer]

i have not tried this yet as the cost per plug here in australia is $35 each but check out a champion w-16y. also i have heard of adaptors that fit the plug hole and use a standard 14mm long reach plug.

[FMF]

Sorry for the delayed response - I have Champion W-18's in my 4 cyl. DB.

[nearchoclatetown]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: FMF</div><div class="ubbcode-body">Sorry for the delayed response - I have Champion W-18's in my 4 cyl. DB. </div></div>Me too. That's not what is recommended, I think that's what was in stock. They seem to work quite well.

[FMF]

I believe the article in the DB Newsletter recommended the W-18 for all early DB 4 cyl. engines. That's why I changed them --- was using some other plug prior.

[Guest backyardmachinc]

Yes w-18 is the plug to use as these are long reach they go below the head surface other sizes reaches above the head surface where carbon will built up .

[Jan Arnett]

Regarding adapters. You can make them from pipe bushing which you rethread the inside to take a 18 MM plug. I did them for my Model T and they work well if you are having trouble finding the plug.

Jan