Spark Plugs

crosleyhotrod 1/8/02 1:20 pm

Does anybody have a cross reference for the different manufactures of spark plugs for the Crosley?? champion, bosch, NEK, etc... with the specific part numbers??? what about the platinum plugs?

Jim_Bollman 1/12/02 5:27 pm

I can't give you a lot of help but since no one with real cross reference books has jumped in here is what I know.

Factory Manual Auto-Lite - AN-7E

Assorted Crosley engines in my collection Auto-Lite - 306 (I think this is a current number) AC - 45, Champion - J-11, J-8, RJ-8C, H-10

I can't vouch for any of these numbers other than AN-7E but the rest are in running engines or engines that were running when I put them away. Jim...

bltlar 1/13/02 1:51 am

From my running engines: Atlas 462 Think this is old. (Sohio Brand) Champion J8C Larry

wally_48329 1/13/02 6:15 am

Any auto parts dealer will have a cross reference on plugs. all you have to do is ask. wally

crosleycamfollower 1/13/02 11:24 am

In my travels across country in my SS, I have stopped in hundreds of auto parts stores and NONE have ever heard of an AN7E or a Crosley.

crosleyhotrod 1/13/02 7:32 pm

Wally, thanks for your help. Like the previous poster said, the auto parts store are of no help. That is why I came here asking for help from other Crosley owners. I didn't ask to get a remark like yours.

wally_48329 1/14/02 6:49 am

I didn't mean to offend. guess here in my area the dealers are a little more up on cars. after all, this is the car capital of the world. wall

crosleyhotrod 1/14/02 10:34 am

Wally, I'm sorry too, I guess I replied in haste. Out here in California, the auto parts stores don't even know what a Crosley is. I am wanting to put either platinums or some type of split fire spark plug in my engine to get a little more ooomp out of it. Take care Crosley friends.

jplaw2 1/14/02 4:32 pm

Contacted Autolite and they sent:
Thank you for the e-mail regarding an Autolite spark plug for your 1951 Crosley Super Sport. We welcome the opportunity to be of service. According to our data, all Crosley vehicles built between 1932 and 1952 use the Autolite 295 spark plug. The Old Autolite AN7-series plug was replaced by the 295. Thank you for

choosing Autolite spark plugs.

Cordially,

Scott Jacobs

bltlar 1/14/02 5:50 pm

Expect "Supersize that??" from the chain parts stores in Ohio. One place didn't even know what a "Grease Zerk" was. Upon leaving a fellow that overheard the whole conversation said "Scares you, don't it??" NAPA stores here are the most knowledgeable. Thanks for the spark plug info. Larry

mrcooby 1/14/02 9:09 pm

Autolite is original equipment for Crosley. For the 1939 to 1942 engines: Autolite 294 replaces the original A-5. For the 1946 to 1952 engines: Autolite 306 replaces the original AN7E.In every case, the spark gap is .25 .I installed Splitfires in my CB-42 Liberty Sedan. A noticeable improvement in power was the result. I put a Splitfire in my 49cc moped; same improvement. These plugs show up best with smaller engines. The Splitfire number for Crosley: SF29E, but it is a discontinued type. There's a Splitfire SF8E which should work, but it has an extended reach. I'm not certain that will not touch the pistons. Could someone try an SF8E with a scrap engine and let us know?The Splitfire number is 1-(800)-224-7584 and the engineers are very willing to discuss the plug interchange. Just tell them the original numbers. PS: If some $8.00-an-hour parts-store says he "never heard of Crosleys", just say "Okay, hand me the book." You'll see how fast he starts to turn those pages to look up the parts you want. It's amazing how many people out there like to brag about what they don't know. Whoops! You got me started!When talking about Crosley, and somebody comes up with "Never heard of it!", I just say "Hey, no problem. Lots of folks aren't into cars." Watch how they start defending themselves, like Ralph Kramden: "Homina, homina, homina ..."Same thing when I ask someone to fix something and I get the "We don't touch those!" attitude. (Oh, you too, eh?) I just lure them into my trap with "Hey, no problem. I appreciate your honesty. You're not able to handle the job and you admit it." They'll say "Oh, we can handle that!" I come right back with something like "So what's your problem then? Got better things to do?" Doesn't get the job done but these attitude guys need to be told, I think. Feels good when I do it, too. ;~)

mrcooby 1/14/02 9:14 pm

Autolite is original equipment for Crosley. For the 1939 to 1942 engines: Autolite 294 replaces the original A-5. For the 1946 to 1952 engines: Autolite 306 replaces the original AN7E. In every case, the spark gap is .25 . I installed Splitfires in my CB-42 Liberty Sedan. A noticeable improvement in power was the result. I put a Splitfire in my 49cc moped; same improvement. These plugs show up best with smaller engines. The Splitfire number for Crosley is SF29E, but it is a discontinued type. There's a Splitfire SF8E which should work, but it has an extended reach. I'm not certain that will not touch the pistons. Could someone try an SF8E with a scrap engine and let us know? The Splitfire phone number is 1-(800)-224-7584 and the engineers are very willing to discuss the plug interchange. Just tell them the original numbers. PS: If some $8.00-an-hour parts-store says he "never heard of Crosleys", just say "Okay, hand me the book." You'll see how fast he starts to turn those pages to look up the parts you want. It's amazing how many people out there like to brag about what they don't know. (Whoops! You got me started!) When talking about Crosley, and somebody comes up with "Never heard of it!", I just say "Hey, no problem. Lots of folks aren't into cars." Watch how they start defending themselves, like Ralph Kramden: "Homina, homina, homina ..." Same thing when I ask someone to fix something and I get the "We don't touch those!" attitude. (Oh, you too, eh?) I just lure them into my trap with "Hey, no problem. I appreciate your honesty. You're not able to handle the job and you admit it." They'll say "Oh, we can handle that!" I come right back with something like "So what's your problem then? Got better things to do?" Doesn't get the job done but these attitude guys need to be told, I think. Feels good when I do it, too. ;~)

installerjack 1/15/02 6:54 am

I have traveled many miles with the SF8E's installed and they are really close to the pistons. Every now and then I would have to pull out number 4 plug and open the gap where the piston had closed it. Now this is on a stock engine, there would probably be no way on a block that had been shaved. There was a definite increase in power. There is also an AC Delco performance plug #10 that will work if you add a plug washer, these plugs come with no washer.

h_mod 1/17/02 5:17 pm

1. Accel makes some plugs I have used; #123?? but it is a colder plug for use in high compression. 2. Piston closing the gap: Figure out where the most room is between piston and plug; usually lateral. Put an index mark on the plug where the point is. Screw the plug in until the index mark shows the points to be where the room is; you may have to use fatter or thinner gaskets. Rotate engine; withdraw plug and check gap. Hope I remembered this right! Ed

h_mod 1/18/02 9:54 pm

Yes, the plugs I use are Accel 123. A 14mm, 3/8"depth, non extended tip plug. Others from my collection of old blocks include: NGK B6S, AC R43, Champion J8C, Champion J6J, Autolite 312, and Prestolite 147. Today I went into our local speed shop for another set of Accels. I asked for 123 type. Oh, he said, do you have a large block chevy? No, I replied, I have the starter motor for one. So if your people glaze over at the name Crosley, ask for plugs for a "Big Block Chevy". Then check diameter, depth of thread, and heat range. If in doubt, get colder plugs rather than wind up with too hot a plug. Good hunting, Ed

speedoo51 1/19/02 8:33 pm

I think it will be found that Big Block Chevy plugs are 3/4 reach, plus have extended tip. I would look into lawnmower plugs, 10-12 hp Tecumseh. Seb.

h_mod 1/20/02 4:18 pm

Seb, you are probably right re big block chevy. I did not have the clerk prove it by looking up one. I did find some old notes on plug substitutions from a while back. Note that Champion now lists a "stock number" along with the old (discarded?) designations. At that time, working back from a Champion J8C that was in an old Crosley block, the general specs are: 14mm, 3/8" reach, 13/16 hex plug wrench. From Hot to Cold the plug numbers were J11C, J19LM, J8C/J17LM, J8C, UJ11G, and J4C. The cross reference section listed (with the second being Champs) NGK B6S = 841/J8C; AC R43 = 102/RJ6C; Autolite 312 = 875/J4C; Accel 123 = 825/J4C; Accel 124 = 823/J6C; Accel 134 = 10/J12YC. A few of these are specialized; e.g. extended tip, resistor, etc. so check them out.

h_mod 1/31/02 4:16 pm

Since the "tip" I received about the Crosley having the same plug as a "big block Chevy" was wrong, the question came up as to what cars/engines did have the same plug?

The modern number for Champion J8 type is Stock Number 871. This cross references to the American Bantam, the Citroen 7 to 15 HP up to 1950, the Chevy 327 HP 1961-66 327 CID, Dodge 1957-59 6 cyl L-head, Fiat prior to 1956, Henry J all models, Kaiser ditto, LaSalle 1935-38, Nash Ex Dual Jet, Nash Statesman Single Carb, and in trucks Chevy 1933-1940 all, Chevy 1949-1959 all 6 cyl, Chevy 1955-57 265 CID, Chev 57-66 283CID, Studebaker 26-36 and a few others. Ask them to check the "Old Car" section of the manual. There seemed to be no modern car with the Champion 871 plug. But now you can bug them with requests for cars scarcer than the Crosley.

Curiously, the cross reference heat range chart for the J-Series 14mm .375"reach 13/16 Hex , "regular" column lists from Hot to Cold the 841/J8C; 823/J6C; 825/J4C; 835/UJ81C but NO mention of the 871/RJ8C in any column. R is for resistor, C is for copper plus end design. Seb is right; there are Tecumseh engines too numerous to mention using the Champion 871/RJ8C. Even more of various brands use the 841/J8C, with no resistor. We're talking ATV's, lawn mowers, snow blowers, tractors, chippers, etc etc. These are modern, so plugs should remain available. An engine sometimes substituted for the Crosley etc is the Fisher Pierce Bearcat 55, also known as the Homelite. This calls for a Champ 592/RJ12C. The change is in the heat range. The 25HP Elgin outboard engine, similar to a Fageol, similar to a Crosley, also calls for this plug.

If you think getting plugs is tough, the Fiat 500 (Italian economy car early 1950s) front A arm I use in my H-Mod race car has a lube point requires an adapter now available only from Rolls Royce! Go figure. Keep 'em running.. Ed

mrcooby 2/8/02 5:02 pm

A note on plugs: I had a set of Valley Forge 44 plugs in my '48 that were there since 1978. In checking on these unfamiliar (to me) plugs, they're made by Bendix, which also makes Autolite, Motorcraft, Sears, and Mighty brand plugs. A reminder: all Crosley plug gaps are .25. Autolite plugs are original equipment, and Autolite 295 plugs will be closest to original on all two-cylinder Crosley models, and Autolite 306 plugs on all four-cylinder models. Enjoy the weekend. Lou