The Ford Barn

1930artdeco · 01-10-2018, 01:03 PM

Hi All,

I just installed, but can uninstall if need be, some new 3x plugs. The washer that came with them is concaved. I installed them so the washer would flatten out when tightened. Is this correct?

Mike

1930-Pickup · 01-10-2018, 01:31 PM

The gasket will take the shape of the head/plug interface, which in this case should be flat. You should be fine, but retorque them after a few miles just to be sure.

BILL WILLIAMSON · 01-10-2018, 02:56 PM

"Rule of thumb" for plug torque is 25 Ft Lbs.
Bills' Specs

burner31 · 01-11-2018, 10:31 AM

So...

1: Concave up, flat down
or
2. Concave down, flat up

Feedback?

katy · 01-12-2018, 10:34 AM

Quote:

Originally Posted by 1930artdeco

Hi All,

I just installed, but can uninstall if need be, some new 3x plugs. The washer that came with them is concaved. I installed them so the washer would flatten out when tightened. Is this correct?

Mike

Either way should be OK.

burner31 · 01-13-2018, 10:00 AM

Sponsored Links (Register now to hide all advertisements)

Answer to post #4 is:

2. Concave down, flat up

BILL WILLIAMSON · 01-14-2018, 07:37 AM

UNIFORM Torueing is MOST important, since plug HEAT is dissipated through the threads & gasket contact area. Make sure the head surface doesn't have paint build up.
Bill W.

01-10-2018, 01:03 PM	#1
1930artdeco Senior Member Join Date: May 2010 Location: Lynden, Wa Posts: 3,550	quick 3X plug question Hi All, I just installed, but can uninstall if need be, some new 3x plugs. The washer that came with them is concaved. I installed them so the washer would flatten out when tightened. Is this correct? Mike __________________ 1930 TownSedan (Briggs) 1957 Country Sedan

01-10-2018, 01:31 PM	#2
1930-Pickup Senior Member Join Date: Mar 2017 Location: southern California Posts: 725	Re: quick 3X plug question The gasket will take the shape of the head/plug interface, which in this case should be flat. You should be fine, but retorque them after a few miles just to be sure. __________________ *"That's my wild unsubstantiated guess, and I'm sticking to it regardless of the facts!"*

01-10-2018, 02:56 PM	#3
BILL WILLIAMSON Senior Member Join Date: Dec 2010 Location: FRESNO, CA Posts: 12,560	Re: quick 3X plug question "Rule of thumb" for plug torque is 25 Ft Lbs. Bills' Specs __________________ "THE ASSISTANT GURU OF STUFF"

01-13-2018, 10:00 AM	#6
burner31 Senior Member Join Date: Dec 2014 Location: Shawnee, Ok Posts: 3,471	Re: quick 3X plug question Sponsored Links (Register now to hide all advertisements) Answer to post #4 is: 2. Concave down, flat up __________________ Keith Shawnee OK '31 SW 160-B

01-14-2018, 07:37 AM	#7
BILL WILLIAMSON Senior Member Join Date: Dec 2010 Location: FRESNO, CA Posts: 12,560	Re: quick 3X plug question UNIFORM Torueing is MOST important, since plug HEAT is dissipated through the threads & gasket contact area. Make sure the head surface doesn't have paint build up. Bill W. __________________ "THE ASSISTANT GURU OF STUFF"

01-11-2018, 10:31 AM	#4
burner31 Senior Member Join Date: Dec 2014 Location: Shawnee, Ok Posts: 3,471	Re: quick 3X plug question So... 1: Concave up, flat down or 2. Concave down, flat up Feedback? __________________ Keith Shawnee OK '31 SW 160-B