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2nd gen hemi valve guide / seal question UPDATE adjustments
#3220457
03/14/24 06:52 PM
03/14/24 06:52 PM
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Joined: Jun 2003
Posts: 21,406
It's a dry heat
gtx6970
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I have mine opened up for some Maintenace
Clean and paint touchups, Intake reseal and valve adjustments
And want to replace the seals while I have it open.
I have a feeling these are not OEM style
The boss where the seal is . measures .528- .530 OD
Valves are 5/16ths OD
SO, Im looking for a quality seal
Last edited by gtx6970; 03/19/24 01:02 PM.
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Re: 2nd gen hemi valve guide / seal question
[Re: gtx6970]
#3220461
03/14/24 06:59 PM
03/14/24 06:59 PM
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Joined: Jan 2004
Posts: 4,564
Motor City
6PKRTSE
master
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master
Joined: Jan 2004
Posts: 4,564
Motor City
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I run US Seal viton valve seals on my Hemi and all my engines for that matter. Never any issues. My Sixpack 440 has over 65,000 miles on it so far.
1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.
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Re: 2nd gen hemi valve guide / seal question
[Re: topside]
#3220491
03/14/24 09:18 PM
03/14/24 09:18 PM
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Joined: Jun 2003
Posts: 21,406
It's a dry heat
gtx6970
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Anyone have sources. I cant find anything where they shows specs / dimensions of the seal. Part of me thinks the guides on mine have been milled to accept the seals that are on it EDIT, these look like they might work https://www.jegs.com/i/COMP-Cams/249/500-12/10002/-1
Last edited by gtx6970; 03/14/24 09:26 PM.
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Re: 2nd gen hemi valve guide / seal question
[Re: gtx6970]
#3220501
03/14/24 10:12 PM
03/14/24 10:12 PM
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Joined: Feb 2005
Posts: 20,164
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,164
PA.
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If I can recommend something stay away from Teflon seals. Get a good set of Viton seals
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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Re: 2nd gen hemi valve guide / seal question
[Re: gtx6970]
#3220556
03/15/24 09:41 AM
03/15/24 09:41 AM
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Joined: Jun 2003
Posts: 21,406
It's a dry heat
gtx6970
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Seals ordered
And am going to put a set of the milodon tube seals in it while I'm here
EDIT ;
Well chit.
The Milodon tube seals are out of stock everywhere until May.
So, I'll just put valve seals in it, adjust valves and deal with oil in the spark plug tubes as I see fit. / another time
Last edited by gtx6970; 03/15/24 10:32 AM.
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Re: 2nd gen hemi valve guide / seal question
[Re: gtx6970]
#3220561
03/15/24 10:01 AM
03/15/24 10:01 AM
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Joined: Jan 2003
Posts: 14,493
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,493
So. Burlington, Vt.
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It looks like there was an inner spring riding on the locating step?
That’s often not a desirable situation.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: 2nd gen hemi valve guide / seal question
[Re: gtx6970]
#3220564
03/15/24 10:13 AM
03/15/24 10:13 AM
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Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
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I wouldn't bother w/ valve seals on the exhaust side. 
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: 2nd gen hemi valve guide / seal question
[Re: an8sec70cuda]
#3220566
03/15/24 10:22 AM
03/15/24 10:22 AM
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Joined: Jun 2003
Posts: 21,406
It's a dry heat
gtx6970
OP
Too Many Posts
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OP
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I wouldn't bother w/ valve seals on the exhaust side. Im not. I know guys in the past who dont even put seals on the exhaust guide
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Re: 2nd gen hemi valve guide / seal question
[Re: fast68plymouth]
#3220567
03/15/24 10:23 AM
03/15/24 10:23 AM
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Joined: Jun 2003
Posts: 21,406
It's a dry heat
gtx6970
OP
Too Many Posts
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OP
Too Many Posts
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It's a dry heat
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It looks like there was an inner spring riding on the locating step?
That’s often not a desirable situation. It has inner springs. I will take a closer look at that once parts get here House projects today
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Re: 2nd gen hemi valve guide / seal question
[Re: an8sec70cuda]
#3220568
03/15/24 10:24 AM
03/15/24 10:24 AM
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Joined: Jan 2003
Posts: 74,978
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,978
U.S.S.A.
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I wouldn't bother w/ valve seals on the exhaust side. Can I ask why ?
running up my post count some more .
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Re: 2nd gen hemi valve guide / seal question
[Re: JohnRR]
#3220570
03/15/24 10:36 AM
03/15/24 10:36 AM
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Joined: Jun 2003
Posts: 21,406
It's a dry heat
gtx6970
OP
Too Many Posts
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OP
Too Many Posts
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It's a dry heat
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I wouldn't bother w/ valve seals on the exhaust side. Can I ask why ? the way it was told to me is the exhaust is a push side . aka no vacuum to pull oil into the port like the intake side does Being brutally honest with myself. Deep down there is a part of me that thinks new seals will do nothing for my oil consumption issues. But , Its cheap and I have it down far enough I have to give it a try.
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Re: 2nd gen hemi valve guide / seal question
[Re: fast68plymouth]
#3220588
03/15/24 11:38 AM
03/15/24 11:38 AM
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Joined: Jun 2003
Posts: 21,406
It's a dry heat
gtx6970
OP
Too Many Posts
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OP
Too Many Posts
Joined: Jun 2003
Posts: 21,406
It's a dry heat
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It looks like there was an inner spring riding on the locating step?
That’s often not a desirable situation. Had me concerned. So took the inner springe and ckd. its good. Outer spring is well outside the inner step. Looks like the damper might be rubbing the stepped edge. And I think thats ok
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Re: 2nd gen hemi valve guide / seal question
[Re: B1MAXX]
#3220616
03/15/24 12:49 PM
03/15/24 12:49 PM
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Joined: Jun 2003
Posts: 21,406
It's a dry heat
gtx6970
OP
Too Many Posts
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OP
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It's a dry heat
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The inner "should" be at the same installed height. Not up on that step.That should get machined away , but If it ain't broke...I would be curios how close to coil bind it is though.
As for the damper the only thing I don't like there is the cast iron going through the engine as it machines itself, but again if it ain't broke....
That head isn't really set for those springs. Thanks, When it comes apart at a later date to freshen it up. I'll have them taken care of , or maybe new heads ???? I'll take a look / ck for coil bind before I put it back together next week. But the engine runs good and has been together for over 20 years with no issues ,,,so far (knocks on wood )
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Re: 2nd gen hemi valve guide / seal question
[Re: JohnRR]
#3220624
03/15/24 01:27 PM
03/15/24 01:27 PM
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Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
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I wouldn't bother w/ valve seals on the exhaust side. Can I ask why ? No vacuum pulling oil in. The exhaust valve is laid over so far on a hemi, the oil doesn't pool up around the guide. Even if it did pull a little oil in, the guides on a hemi could probably use all the lube they can get, lol. I've seen so many hi-perf engines over the years that didn't have seals on the exhaust side and had no issues w/ oil getting past them. I decided to try it myself and have seen no problems.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: 2nd gen hemi valve guide / seal question
[Re: an8sec70cuda]
#3220665
03/15/24 04:57 PM
03/15/24 04:57 PM
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Joined: Jan 2003
Posts: 74,978
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,978
U.S.S.A.
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I wouldn't bother w/ valve seals on the exhaust side. Can I ask why ? No vacuum pulling oil in. The exhaust valve is laid over so far on a hemi, the oil doesn't pool up around the guide. Even if it did pull a little oil in, the guides on a hemi could probably use all the lube they can get, lol. I've seen so many hi-perf engines over the years that didn't have seals on the exhaust side and had no issues w/ oil getting past them. I decided to try it myself and have seen no problems. thanks Chip ... and Bill ... makes sense .
running up my post count some more .
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Re: 2nd gen hemi valve guide / seal question
[Re: rickseeman]
#3221469
03/19/24 04:09 PM
03/19/24 04:09 PM
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Joined: Jun 2003
Posts: 21,406
It's a dry heat
gtx6970
OP
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OP
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It was straight on my computer. I don't know what to do. I got it straight
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Re: 2nd gen hemi valve guide / seal question
[Re: gtx6970]
#3221886
03/21/24 11:58 AM
03/21/24 11:58 AM
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Joined: Jun 2003
Posts: 21,406
It's a dry heat
gtx6970
OP
Too Many Posts
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OP
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Valves all adjusted. New intake valve seals. And put the spark plug tube seals in while it was apart. So hopefully no more oil getting in the tubes Just waiting on intake gaskets now The Milodon tube seals are on backorder. So took a chance with these Ebay versions. Worked perfect. https://www.ebay.com/itm/196284907202
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