Bubble Testing Before Installing it!

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rozemab
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Joined: Fri Apr 03, 2009 9:46 am
Bikes: 1958 Duo Glide

Re: Bubble Testing Before Installing it!

#16

Post by rozemab » Sat Sep 16, 2017 9:20 pm

tattoomark wrote:
Fri Sep 15, 2017 11:12 pm
Oh no I know I bought one of those from fnc just haven't installed it yet that's why I'm asking you if it worked or not I didn't want to do all that to find out it was a piece of junk so it worked and it worked well
Not junk! Second best improvement i've done to the old panhead. The first being Russ' RSES. Electric starter.

The sleeves are stiff and they grip the nipples and manifold well before the clamps are installed. Use your carb as a fixture to ensure the manifold is indexed correctly before tightening the clamps.

Regarding the clamps

I installed them loosely and then applies air at 10 psi. I slowly tightened them until they sealed. I then performed the bubble test. You don't have to use brute force on the clamps.



tattoomark
Posts: 64
Joined: Sun Sep 14, 2008 3:30 pm
Bikes: 1955 pan,79 shovel,93 flhtp

Re: Bubble Testing Before Installing it!

#17

Post by tattoomark » Mon Sep 18, 2017 1:04 pm

Thanks!

tattoomark
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Joined: Sun Sep 14, 2008 3:30 pm
Bikes: 1955 pan,79 shovel,93 flhtp

Re: Bubble Testing Before Installing it!

#18

Post by tattoomark » Mon Nov 06, 2017 9:15 pm

Just wondering how much of a gap in between the intake manifold and head?
Thanks Mark

melchorz
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Re: Bubble Testing Before Installing it!

#19

Post by melchorz » Mon Nov 13, 2017 5:22 am

I used a James Gastet set.
[image]
20171103_170621438_iOS.jpg
Roll bands on manifold like this.
20171103_170621438_iOS.jpg (732.1 KiB) Viewed 351 times
20171103_170634382_iOS.jpg
Another view of band before installing manifold.
20171103_170634382_iOS.jpg (757.32 KiB) Viewed 351 times
[/image]
Remember to position clamps on heads, resting on O-rings
(Installed earlier).
9F0AF101-E306-4642-9E09-212339E19B60.jpeg
9F0AF101-E306-4642-9E09-212339E19B60.jpeg (936.31 KiB) Viewed 351 times
Insert manifold between heads from the left side of engine, angled down slightly.
Next allow o-rings to pop into the gaps between the heads. Then roll the bands in position, capturing the o-rings. If o-rings slip out start again. Might take several attempts. Then tighten the clamps.
This works for the types of clamp/o-ring/band set shown.
Here is the 2” rubber stopper and valve stem I used with a bicycle pump I used to bubble test.
20171103_011216604_iOS.jpg
2” rubber stopper, drilled with car tire valve tightly inserted.
20171103_011216604_iOS.jpg (701.3 KiB) Viewed 351 times
Attachments
20171103_170410043_iOS.jpg
Place O-rings on heads first.
20171103_170410043_iOS.jpg (741.98 KiB) Viewed 351 times

rozemab
Posts: 156
Joined: Fri Apr 03, 2009 9:46 am
Bikes: 1958 Duo Glide

Re: Bubble Testing Before Installing it!

#20

Post by rozemab » Mon Nov 13, 2017 6:49 pm

tattoomark wrote:
Mon Nov 06, 2017 9:15 pm
Just wondering how much of a gap in between the intake manifold and head?
Thanks Mark
Sorry for the late reply:

IIRC, I have it around .030 in, or .015 in per side.

I had to machine the manifold to those gaps. Out of the box, it would not fit the opening between the heads. I can't remember how much was removed though but it was an equal amount on both inlets.

Since I'm not relying on the o-ring for sealing, the 'tube' gasket can accommodate a significant 'off' indexing of the heads.

ozwick86
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Re: Bubble Testing Before Installing it!

#21

Post by ozwick86 » Mon Nov 13, 2017 7:54 pm

I have found that using the OEM clamps work the best. The don't slip and won't pinch the O-Ring.

VT Part # 35-0439 Manifold Clamp

I have the Cadmium ones.

Replica 57-76XL/BT-Cad Intake Clamp Set
Replica Intake Clamp Set features fillister head screws.

Sold in pairs

1957-76

Cadmium

Details
Part Number 35-0439
Manufacturer VTwin Manufacturing, Inc
OEM Part Number 27063-57
Vendor VTwin

tattoomark
Posts: 64
Joined: Sun Sep 14, 2008 3:30 pm
Bikes: 1955 pan,79 shovel,93 flhtp

Re: Bubble Testing Before Installing it!

#22

Post by tattoomark » Tue Nov 14, 2017 11:01 am

Thanks for getting back to me
I guess Im screwed on the gap using good old vtwin heads I have. 030 on each side of the manifold (I'm using a -55a) I even tried a plumbers style (61) it might of worked but the od on the head shoulder is alot larger than the
Od on the earley style manifold that's with the fnc seal
I tried to seal the intake using a o ring then the fnc seal over it and manifold shifts away from one side in other words I just end up with a giant air intake leak I have done the bubble test no air leaks but once the bike is running the seal starts moving away from the shoulder of the head if I sound like I'm crazy and babbling I am I have been fighting this all summer I was better off with the original head that had a Crack in it.

rozemab
Posts: 156
Joined: Fri Apr 03, 2009 9:46 am
Bikes: 1958 Duo Glide

Re: Bubble Testing Before Installing it!

#23

Post by rozemab » Wed Nov 15, 2017 1:25 am

tattoomark wrote:
Tue Nov 14, 2017 11:01 am
Thanks for getting back to me
I guess Im screwed on the gap using good old vtwin heads I have. 030 on each side of the manifold (I'm using a -55a) I even tried a plumbers style (61) it might of worked but the od on the head shoulder is alot larger than the
Od on the earley style manifold that's with the fnc seal
I tried to seal the intake using a o ring then the fnc seal over it and manifold shifts away from one side in other words I just end up with a giant air intake leak I have done the bubble test no air leaks but once the bike is running the seal starts moving away from the shoulder of the head if I sound like I'm crazy and babbling I am I have been fighting this all summer I was better off with the original head that had a Crack in it.
The O.D. of the manifold must be the same as the O.D. of the heads. On my setup that O.D. is 2.0 inches. I can see the Fnc band moving as it is not meant to stretch. What are your O.D. s?

tattoomark
Posts: 64
Joined: Sun Sep 14, 2008 3:30 pm
Bikes: 1955 pan,79 shovel,93 flhtp

Re: Bubble Testing Before Installing it!

#24

Post by tattoomark » Wed Nov 15, 2017 12:37 pm

I'm going to measure it this morning and get back to you just outta curiosity what style manifold do you have I notice and didn't have any numbers on it

tattoomark
Posts: 64
Joined: Sun Sep 14, 2008 3:30 pm
Bikes: 1955 pan,79 shovel,93 flhtp

Re: Bubble Testing Before Installing it!

#25

Post by tattoomark » Wed Nov 15, 2017 6:20 pm

Do you have a part # for the paucgho manifold?

rozemab
Posts: 156
Joined: Fri Apr 03, 2009 9:46 am
Bikes: 1958 Duo Glide

Re: Bubble Testing Before Installing it!

#26

Post by rozemab » Wed Nov 15, 2017 11:22 pm

tattoomark wrote:
Wed Nov 15, 2017 6:20 pm
Do you have a part # for the paucgho manifold?
pn 704

704 Stock replacement O-ring manifold for 1955–1965
Panheads (OEM 27029-55) _

http://www.paughco.com

tattoomark
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Bikes: 1955 pan,79 shovel,93 flhtp

Re: Bubble Testing Before Installing it!

#27

Post by tattoomark » Thu Nov 16, 2017 3:54 am

Thank you you didn't use the oring with it right?

ozwick86
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Re: Bubble Testing Before Installing it!

#28

Post by ozwick86 » Thu Nov 16, 2017 8:51 pm

Use only the Viton / brown ones.

rozemab
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Re: Bubble Testing Before Installing it!

#29

Post by rozemab » Fri Nov 17, 2017 3:11 am

tattoomark wrote:
Thu Nov 16, 2017 3:54 am
Thank you you didn't use the oring with it right?
Correct only used the fnc band.

tattoomark
Posts: 64
Joined: Sun Sep 14, 2008 3:30 pm
Bikes: 1955 pan,79 shovel,93 flhtp

Re: Bubble Testing Before Installing it!

#30

Post by tattoomark » Fri Nov 17, 2017 4:24 pm

Thanks

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