Hey, new man here, can someone tell me the part number for the extended reach Autolite spark plugs required when the adaptor for 14mm plugs has been installed? The previous owner (PO) installed the adaptors and had short reach plugs installed (looked like lawn mower plugs). I'm afraid to try removing the adaptors in order to use the "big" plugs. Any help will be appreciated.
I don't have the number for you but the inserts should be brass and just screw out like a plug.
Back to the question on plugs, are you running coils or distributor? If you are running coils I have found that you will need to find non resistor type plugs. The resistors don't like the up-down voltage spikes and seem to burn out the resistors rather quick.
Welcome to the forum.
I have two sets of adapters, and they just screw out, there really shouldn't be an issue unless superman put them in.
As far as the plugs, I can get you the number when I get home from work if no one responds by then. I run the newer plugs and adapters on my stuff, just easier to get modern plugs around here.
Oh yea, and welcome to the affliction.
Thanks for the welcomes. Yes, Chad, I would like the P/N when you get it. I am running coils, rebuilt by The Coil Man. The car is a 1914 touring, a nice driver, not show quality. I have complete purchase history from new, I'm the 4th owner. Also, thanks for the advice re the adapters, I may try to get them out as I have a set of the large base Autolites (3095).
A couple years back I ran Autolite plugs in my touring car. I found, after the engine was up to run temperature, that the porcelain loosened in the plugs and caused a compression leak and a loss of power.
Are those the plugs with the glued-in terminals that loosen and fall out?
Some people don't know when to stop when tightening spark plugs.
When I first got our '27 the plugs were so tight I had to use a deep socket and a breaker bar to get them out. And, no, they weren't rusted, just super tight.
OK, I tried removing the adapters and they came right out, installed the 3095 Autolites and all looks good. Reading Ken's post above, I did't really horse down the plugs, however, there is still about 3 threads showing, is this normal? Again, the plugs are tight but not long breaker bar tight.
"however, there is still about 3 threads showing, is this normal?"
More or less. The plugs have 1/2" pipe thread (NPT) which is tapered so they tighten and seal w/out a gasket.
Ken, thanks, I thought that was OK. All advise is very appreciated!