V-Twin "Replica" Pan Heads

[59Panman]

Raytag,

I searched online and found these sites.
https://www.allorings.com/configurator-qty
Don't know if they ship to Europe?

I think you want the FKM Viton ones Black or Brown? I think the Brown ones handle higher heat?

Here are a couple in the UK
https://www.polymax.co.uk/o-rings/rubber-viton-oring/

https://simplybearings.co.uk/shop/Seals ... qdEALw_wcB

Europe
https://www.sealsupply.eu/static-seals/ ... 1UEALw_wcB

[Raytag]

Thanks Ozwick for your consideration and time.
My comment was pointed at awanders observation reg that puff of air out of the spark plug hole. Most valve seat cutter have a 31 and 46 degree angle (instead of 30 & 45). This will leave a "burr" on the seat. After a few heat cycles the valve has flattened it and creates a perfect seal

ray

...
With the o-rings installed, the manifold-to-head joint seems good, but I did notice that with 15psi applied, the intake valves appear to be leaking slightly. If I put my thumb over either open spark plug hole, with all 4 valves closed(pushrods slackened so I am sure the valves are closed), and wait a few seconds, when I pull my thumb off, I get a little puff of air out of the spark plug hole.
....

[awander]

Thomas:

Your O-rings will be in tomorrow's mail.

Thanks!

[RooDog]

Another consideration is that you are applying positive pressure opposite to the negative pressure, vacuum, the intake tract normally operates under. You are pushing that intake valve open. Under operating conditions the intake tract sees anywherr from zero to minus 15-18 inches of vacuum, at that time the valve is open. and on the compression and power strokes the pressure runs from about 55-65# to perhaps over a thousand, or something high depending on many variables. The point is that the intake valve is pushed into the seat when the engine is running, and being pushed away from the seat during the bubble test. Some early aircraft engines didn't even have valve springs, relying on the poppet valves ability to self energize, much like a simple check valve. I see no problem with Andy's setup, no?
....RooDog....

[dontsink]

Thomas:

Your O-rings will be in tomorrow's mail.

Thanks!

Thanky you Andy!

[awander]

Thanksgiving, Day...I have a lot to be thankful for!

I got to spend the day with my kids, and I finally got the motor back together with the new heads!

Of course, you fine folks on these forums are something else I'm thankful for.

Here's a Before shot:

Before.jpg (116.96 KiB) Viewed 1255 times

And one taken today with the new heads:

After.jpg (146.93 KiB) Viewed 1255 times

I decided to leave the cylinders black, as I think it contrasts nicely with the aluminum heads and cases. I also replaced nearly all of the chrome acorn head hardware with stock, or close to stock, stuff.

Tomorrow I'm going to have my son help me re-install the engine in the frame, and then I'll put the rest of the bike back together.

[bangkokbob]

Head oiler to rear head from pressure sensor.
Then no head oiler.
Am I missing something in the pictures?
Regards B.B.

[awander]

Bob, for the last few years, I have had the rear head off of my '64 on the '52.

The '64 head needs an outside oil line, so I rigged one up from the pressure sensor port on the pump.

I finally got a new set of heads for the '52. so I can put the '64 back together.

[dipstick]

Totally agree on the black cylinders. Nice job!

[awander]

It's been cold any rainy here, so I had to clear some space in the shop, so I could work on the bike indoors.

I've got it all back together except for the tanks. Should be ready to start 'er up in a couple of days.

[awander]

Well, put the tanks on today-I had to do some tweaking on the gas line to fit around the larger fins on these '55-'62 style heads.

Then I started her up, and ran the engine for about 15 minutes to get up to temp.

Dialed in the Linkert as best I could, and everything seems good. LOTS of oil returning to the tank, nice steady flow.

I'm gonna check the pushrods and do one more heat cycle, then check the torque on the head bolts, check the pushrods again, and take 'er for the first ride tomorrow. I'm looking forward to it!

[panhead_kicker]

That's great Andy! We need more photos !!

[awander]

Here's a shot of the motor in the frame and ready to go.

New Heads Installed and running.jpg (317.82 KiB) Viewed 1106 times

The Yellow and Blue highlights are reflections of the foam mats that I have on the floor for kneeling on while I work on the bike-they look kind of weird, huh?

[RooDog]

Looks good, Andy, I hope those heads live a long life and you are rewarded for you efforts toward making 'em right....
....RooDog....

[awander]

Thanks, Roo.

If all goes well, I plan to run them for a while and then post my conclusions.

(plus a confession)