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Old 06-20-2016, 08:08 AM   #1
dangerous_dave
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Default O-Ring Install Panhead

Hey all. Was wondering what the best way to re-install an S&S intake on a Pan with o-rings is? I searched all over the inter-web and everyone just brushes over it like its nothing. The way i did it today (slipped the o-rings up onto the t piece) seems like its gonna compromise those seals for sure but couldn't really figure any other approach.
Am I missing something real basic here? Thanks.
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Old 06-20-2016, 12:28 PM   #2
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Default Re: O-Ring Install Panhead

Dave,
That is the same way I install them (not too much choice here!).
You'll want to use viton o-rings and good quality clamps that apply even pressure all the way around.
When snugging up the clamps, you want to compress the o-rings just enough to get a good seal - not gorilla tight!
Make sure to use a carb support as well.

Geo.
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Old 06-20-2016, 12:58 PM   #3
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Default Re: O-Ring Install Panhead

we take a USA made plastic type electrical tape and roll it around the o rings and the manifold / heads spicket and it improves the seal over a longer period of time

just make sure its all aligned before doing it as it wont want to slide around after the tape is on
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Old 06-20-2016, 03:05 PM   #4
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Default Re: O-Ring Install Panhead

If you do what John said the tape you want is 3M super 33 or super 88. These tapes are temp rated. One wrap only . you don't want tape glue mush under there. I always pop the O-rings up onto the manifold. If you fingers aren't sore you did something wrong .
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Old 06-20-2016, 06:21 PM   #5
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Default Re: O-Ring Install Panhead

Quote:
Originally Posted by old.wrench View Post
Dave,
That is the same way I install them (not too much choice here!).
You'll want to use viton o-rings and good quality clamps that apply even pressure all the way around.
When snugging up the clamps, you want to compress the o-rings just enough to get a good seal - not gorilla tight!
Make sure to use a carb support as well.

Geo.
Geo! Long time. That's good news on the install. I'll make a pressure tester and do it right. Thanks mate.
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Old 06-20-2016, 06:22 PM   #6
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Default Re: O-Ring Install Panhead

Quote:
Originally Posted by johnjzjz View Post
we take a USA made plastic type electrical tape and roll it around the o rings and the manifold / heads spicket and it improves the seal over a longer period of time

just make sure its all aligned before doing it as it wont want to slide around after the tape is on
Thanks johnjzjz. I'll give it a go.
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Old 06-20-2016, 08:40 PM   #7
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Default Re: O-Ring Install Panhead

Pressure test it as you go. I use windex and an old grip with rubber tape wrapped until it fits the intake. Some guys use a plate and a small hole for the blowgun tip.

Not too much pressure. 20-25 psi max for me.



Something like this.
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Old 06-20-2016, 08:49 PM   #8
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Default Re: O-Ring Install Panhead

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Originally Posted by JAWS View Post
Pressure test it as you go. I use windex and an old grip with rubber tape wrapped until it fits the intake. Some guys use a plate and a small hole for the blowgun tip.

Not too much pressure. 20-25 psi max for me.



Something like this.
Thats pretty sweet.
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Old 06-20-2016, 09:24 PM   #9
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Default Re: O-Ring Install Panhead

Quote:
Originally Posted by JAWS View Post
Pressure test it as you go. I use windex and an old grip with rubber tape wrapped until it fits the intake. Some guys use a plate and a small hole for the blowgun tip.

Not too much pressure. 20-25 psi max for me.



Something like this.
That's a sweet idea!
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Old 06-21-2016, 01:43 AM   #10
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Default Re: O-Ring Install Panhead

Quote:
Originally Posted by old.wrench View Post
Dave,
That is the same way I install them (not too much choice here!).
You'll want to use viton o-rings and good quality clamps that apply even pressure all the way around.
When snugging up the clamps, you want to compress the o-rings just enough to get a good seal - not gorilla tight!
Make sure to use a carb support as well.

Geo.
Hey Geo. I put everything back on the bike and gave it a go at starting it. She kicked over nearly every kick, spat flames out the front pipe a few times and blew thick black smoke but wouldn't catch. She did fire twice but I couldn't jockey it to keep going.
Tomorrow I'm going to check the baseline settings of the carb (super B) and order up some new clamps and o-rings for the intake.
A few fellas said check my valve adjust so I'll read up on that tonight as well.
Is there anything else that springs to mind in your experience? As always, it's much appreciated, Dave.
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Old 06-21-2016, 02:14 AM   #11
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Default Re: O-Ring Install Panhead

What ignition?
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Old 06-21-2016, 04:14 AM   #12
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Default Re: O-Ring Install Panhead

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What ignition?
Manual advance single point. Condenser, points and plugs all less than 200 miles Jaws. I might have to use the grip off my bike and rule the leak out.
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Old 06-21-2016, 09:42 AM   #13
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Default Re: O-Ring Install Panhead

You have ignition but maybe not at the right time." she kicked over every kick"
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Old 06-22-2016, 03:54 PM   #14
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Quote:
Originally Posted by Dave B View Post
You have ignition but maybe not at the right time." she kicked over every kick"
Yeah that's driving me crazy Dave_B. I've checked it plenty but maybe I'm reading the manual wrong. Timing mark in the right of window, timing mark on distributor as in pic. Gap set at 0.22 on highest point of lobe. Spark plugs at 0.25. Gap at timing marks set to lightly drag rolling paper through. Is this right or have I messed it up? Any advice is awesome.
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Old 06-22-2016, 03:59 PM   #15
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Default Re: O-Ring Install Panhead

Timing mark for advance not TDC on the front cylinder, centered in the hole. Turn the points cam full advance and hold. Rotate points plate to where the points just crack open on the NARROW lobe or in your case the points rubbing tab in line with the mark on that lobe. Lock it down there and set the gap. I like 18 thou.
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Old 06-22-2016, 06:14 PM   #16
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Default Re: O-Ring Install Panhead

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Timing mark for advance not TDC on the front cylinder, centered in the hole. Turn the points cam full advance and hold. Rotate points plate to where the points just crack open on the NARROW lobe or in your case the points rubbing tab in line with the mark on that lobe. Lock it down there and set the gap. I like 18 thou.
Thanks JAWS. Attached is pic of where I been setting it from. Stoked to get some help on that.Click image for larger version

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Old 06-22-2016, 06:29 PM   #17
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Default Re: O-Ring Install Panhead

1) front cylinder compression stroke.
2) timing mark in timing hole (as in photo)
3) timer fully advanced.
4) points (previously set at 18 thou) JUST ABOUT TO OPEN ON NARROW CAM LOBE.
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Old 06-22-2016, 09:09 PM   #18
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Default Re: O-Ring Install Panhead

I like it in the center of the hole and I manually hold the points cam at full advance. Then once running I can fine tune.

Bare in mind, the book is for a reference to get things as they should be during building, spec wise and to help get it running, each bike unless dead stock original, will need some tinkering and slight deviation from the book is expected. Cam change or compression change for example, altitude etc...

You get the notion. The basics are a standard for zero... Start there and move in small bites.

My pan likes it in the center, but Ive had others where the mark is damn near out of sight!
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