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Hemi Spark plug tubes #3062369 07/25/22 11:45 AM 07/25/22 11:45 AM
Joined: Mar 2005 Posts: 2,060 Pendleton NY T terzmo OP top fuel
terzmo OP top fuel T Joined: Mar 2005 Posts: 2,060 Pendleton NY	Changed the plugs on a 426 Hemi and # 1 and 2 were nice and dry...#3 through 8 had oil. Plugs installed with washers from day 1. Is there a solution to keeping the oil out ? I would think that by now someone would invent some sort of seal or gasket. Thanks MOPARTS...Thanks to all in advance

Re: Hemi Spark plug tubes [Re: terzmo] #3062378 07/25/22 12:05 PM 07/25/22 12:05 PM
Joined: Feb 2014 Posts: 1,696 central il. S second 70 top fuel
second 70 top fuel S Joined: Feb 2014 Posts: 1,696 central il.	I always have oil in some of my tubes. It's just something I quit fighting and learned to accept was the norm.

Re: Hemi Spark plug tubes [Re: terzmo] #3062388 07/25/22 12:33 PM 07/25/22 12:33 PM
Joined: Jan 2003 Posts: 4,711 Moved to N.E. Tennessee GomangoCuda master
GomangoCuda master Joined: Jan 2003 Posts: 4,711 Moved to N.E. Tennessee	There are tube seals made for this Milodon sold by Summit, Jegs, Mancini and many others Summit Much cheaper. Made in China copy? Classic Industries Note:. They install easier if you freeze them first. Note2: Don't know if it is true but I read somewhere that they may not fit aftermarket heads that have beafier rocker stands. Last edited by GomangoCuda; 07/25/22 01:06 PM. In theory, there is no difference between theory and practice. In practice, there is.

Re: Hemi Spark plug tubes [Re: terzmo] #3062403 07/25/22 01:11 PM 07/25/22 01:11 PM
Joined: Jan 2003 Posts: 74,942 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,942 U.S.S.A.	There are seals available , has been for decades . I thought I read no washers on the plugs ? running up my post count some more .

Re: Hemi Spark plug tubes [Re: JohnRR] #3062427 07/25/22 01:56 PM 07/25/22 01:56 PM
Joined: Jan 2003 Posts: 20,725 A collage of whims topside Too Many Posts
topside Too Many Posts Joined: Jan 2003 Posts: 20,725 A collage of whims	Always had a little oil in mine, didn't seem to affect the plug. The washers really scrape the hell out of the tubes; I quit using washers and never had a problem without them.

Re: Hemi Spark plug tubes [Re: GomangoCuda] #3062473 07/25/22 03:14 PM 07/25/22 03:14 PM
Joined: Mar 2005 Posts: 2,060 Pendleton NY T terzmo OP top fuel
terzmo OP top fuel T Joined: Mar 2005 Posts: 2,060 Pendleton NY	Originally Posted by GomangoCuda There are tube seals made for this Milodon sold by Summit, Jegs, Mancini and many others Summit Much cheaper. Made in China copy? Classic Industries Note:. They install easier if you freeze them first. Note2: Don't know if it is true but I read somewhere that they may not fit aftermarket heads that have beafier rocker stands. Valve covers off for installation or just plugs and tubes...Thanks

Re: Hemi Spark plug tubes [Re: topside] #3062476 07/25/22 03:17 PM 07/25/22 03:17 PM
Joined: Mar 2005 Posts: 2,060 Pendleton NY T terzmo OP top fuel
terzmo OP top fuel T Joined: Mar 2005 Posts: 2,060 Pendleton NY	Originally Posted by topside Always had a little oil in mine, didn't seem to affect the plug. The washers really scrape the hell out of the tubes; I quit using washers and never had a problem without them. Did You initially remove the washers or after one or two plug changes ? I'm told that the washers beat up the tubes...told the washers stay on...big debate I guess. Thanks

Re: Hemi Spark plug tubes [Re: terzmo] #3062489 07/25/22 04:03 PM 07/25/22 04:03 PM
Joined: Jan 2003 Posts: 74,942 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,942 U.S.S.A.	Originally Posted by terzmo . Valve covers off for installation or just plugs and tubes...Thanks I think it would be a lot easier with the covers off. running up my post count some more .

Re: Hemi Spark plug tubes [Re: JohnRR] #3062497 07/25/22 04:30 PM 07/25/22 04:30 PM
Joined: Jan 2003 Posts: 20,725 A collage of whims topside Too Many Posts
topside Too Many Posts Joined: Jan 2003 Posts: 20,725 A collage of whims	1st few times, I ran the washers - heard from a Hemi racer/engine guy not to - saw what he meant at next plug change. Replaced the tubes rather than risk little shards getting into anything. Ran it some 30 years w/o the washers.

Re: Hemi Spark plug tubes [Re: JohnRR] #3062511 07/25/22 05:24 PM 07/25/22 05:24 PM
Joined: Jan 2003 Posts: 4,711 Moved to N.E. Tennessee GomangoCuda master
GomangoCuda master Joined: Jan 2003 Posts: 4,711 Moved to N.E. Tennessee	Originally Posted by JohnRR Originally Posted by terzmo . Valve covers off for installation or just plugs and tubes...Thanks I think it would be a lot easier with the covers off. Impossible with covers on. In theory, there is no difference between theory and practice. In practice, there is.

Re: Hemi Spark plug tubes [Re: JohnRR] #3062584 07/25/22 10:14 PM 07/25/22 10:14 PM
Joined: Jan 2003 Posts: 15,265 Omaha Ne T TJP I Live Here
TJP I Live Here T Joined: Jan 2003 Posts: 15,265 Omaha Ne	Originally Posted by JohnRR There are seals available , has been for decades . I thought I read no washers on the plugs ? Correct or the tubes gall www.tandmautomotive-omaha.com

Re: Hemi Spark plug tubes [Re: TJP] #3062658 07/26/22 10:55 AM 07/26/22 10:55 AM
Joined: Jan 2003 Posts: 17,838 S.E. Michigan ZIPPY I Live Here
ZIPPY I Live Here Joined: Jan 2003 Posts: 17,838 S.E. Michigan	Originally Posted by TJP Originally Posted by JohnRR There are seals available , has been for decades . I thought I read no washers on the plugs ? Correct or the tubes gall With or without lubricant/anti seize compound? Aluminum head instructions always state use anti seize compound....should take care of that Rich H. Esse Quam Videri

Re: Hemi Spark plug tubes [Re: ZIPPY] #3062666 07/26/22 11:11 AM 07/26/22 11:11 AM
Joined: Mar 2005 Posts: 2,060 Pendleton NY T terzmo OP top fuel
terzmo OP top fuel T Joined: Mar 2005 Posts: 2,060 Pendleton NY	Will the tube seals work on aluminum heads ? Now I changed the plugs and left the washers on. Drove the car and the smoke and sputtering cleared up as usual but now when it sits for a while and I start it..it fires up nicely but idles erraticly and smokes for a few minutes..like I just changed a plug. So I "assume" there is a tube or two leaking into a cylinder or two. New tubes and no washers ?

Re: Hemi Spark plug tubes [Re: terzmo] #3062671 07/26/22 11:22 AM 07/26/22 11:22 AM
Joined: Jan 2004 Posts: 8,233 fredericksburg,va C cudaman1969 master
cudaman1969 master C Joined: Jan 2004 Posts: 8,233 fredericksburg,va	Originally Posted by terzmo Will the tube seals work on aluminum heads ? Now I changed the plugs and left the washers on. Drove the car and the smoke and sputtering cleared up as usual but now when it sits for a while and I start it..it fires up nicely but idles erraticly and smokes for a few minutes..like I just changed a plug. So I "assume" there is a tube or two leaking into a cylinder or two. New tubes and no washers ? “Will the tube seals work on aluminum heads?” They do on my -m heads

Re: Hemi Spark plug tubes [Re: terzmo] #3062750 07/26/22 01:38 PM 07/26/22 01:38 PM
Joined: Mar 2011 Posts: 3,068 Michigan A A727Tflite master
A727Tflite master A Joined: Mar 2011 Posts: 3,068 Michigan	Originally Posted by terzmo Will the tube seals work on aluminum heads ? Now I changed the plugs and left the washers on. Drove the car and the smoke and sputtering cleared up as usual but now when it sits for a while and I start it..it fires up nicely but idles erraticly and smokes for a few minutes..like I just changed a plug. So I "assume" there is a tube or two leaking into a cylinder or two. New tubes and no washers ? Since inception we have never used spark plug washers. Makes no difference if cast iron or aluminum heads. If tubes were used with washers I would start with new tubes or find the appropriate size socket and extension and flatten the inside gasket face of the tube. Depends how knarled up they are.

Re: Hemi Spark plug tubes [Re: terzmo] #3062946 07/27/22 09:49 AM 07/27/22 09:49 AM
Joined: Jun 2015 Posts: 313 Northeast Indiana 7 73DAD enthusiast
73DAD enthusiast 7 Joined: Jun 2015 Posts: 313 Northeast Indiana	I don't understand why using the washer on the plug would cause galling while removing them doesn't. Most of you guys seem to be in agreement on it so there must be some truth to it. I would expect a plug with no washer would compress the tube end, drag against the aluminum while tightening, and work harden it until it chips off. I would also the expect a crush washer to somewhat prevent that. But the opposite is true??? I've been using the crush washers on my own Hemi since I built it in 2016, so far so good on the tubes, but I'm open to change if there's a good reason.

Re: Hemi Spark plug tubes [Re: 73DAD] #3062969 07/27/22 10:41 AM 07/27/22 10:41 AM
Joined: Jun 2014 Posts: 1,321 VA D dragon slayer pro stock
dragon slayer pro stock D Joined: Jun 2014 Posts: 1,321 VA	It was recommended to me also, and I used them. I just don't torque down as much on the plugs.

Re: Hemi Spark plug tubes [Re: 73DAD] #3062970 07/27/22 10:44 AM 07/27/22 10:44 AM
Joined: Mar 2011 Posts: 3,068 Michigan A A727Tflite master
A727Tflite master A Joined: Mar 2011 Posts: 3,068 Michigan	Originally Posted by 73DAD I don't understand why using the washer on the plug would cause galling while removing them doesn't. Most of you guys seem to be in agreement on it so there must be some truth to it. I would expect a plug with no washer would compress the tube end, drag against the aluminum while tightening, and work harden it until it chips off. I would also the expect a crush washer to somewhat prevent that. But the opposite is true??? I've been using the crush washers on my own Hemi since I built it in 2016, so far so good on the tubes, but I'm open to change if there's a good reason. You reduce the effective surface area by using the washer which increases the “unit loading” which galls the tube. The tube acts as a seal, pinched by the plug and head, it conforms to the plug and head. I have actually had to use a few tubes that were jacked up. By repeated tightening and loosening you can sometimes salvage the tube in a pinch. (A similar galling issue - using the incorrect head gasket on an aluminum head). Last edited by Transman; 07/27/22 10:46 AM.

Re: Hemi Spark plug tubes [Re: 73DAD] #3063018 07/27/22 01:55 PM 07/27/22 01:55 PM
Joined: Aug 2003 Posts: 43,096 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,096 Bend,OR USA	All the hemi motors I know of, except the latest Gen 3 motors that I have not work, came with washers on all the plugs. I have had some of the tubes on the 426 motor tear the sealing surfaces off completely and still work fine with the after market push in tube seals I did try running one of those motors several times without the washer and ended putting them back in, especially on iron heads Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Hemi Spark plug tubes [Re: Cab_Burge] #3063025 07/27/22 02:34 PM 07/27/22 02:34 PM
Joined: Jan 2004 Posts: 8,233 fredericksburg,va C cudaman1969 master
cudaman1969 master C Joined: Jan 2004 Posts: 8,233 fredericksburg,va	Just use the oil plug nylon washer,

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