Oil Pressure Gauge Fitting Chrome

All Panhead related discussions, questions etc.
RooDog
Senior Member
Posts: 5327
Joined: Tue Oct 31, 2017 1:00 pm
Bikes: 1950 Panhead, Resto-Mod
1968 90", 5 Speed Shovelhead,
1984 Home Built Custom Evo 100" Bagger
Location: Knoxville, Tennessee
Has thanked: 2801 times
Been thanked: 2158 times

Re: Oil Pressure Gauge Fitting Chrome

#31

Post by RooDog »

I don't remember what the "seal" should be on an engine with a splined shaft, but It would probably be a good idea to use an aftermarket rubber lip seal with a smooth spacer on the shaft since you are running a belt.

There would be no point in removing the drain plug, even if you could. The engine should purge that oil in the crank case over to the cam chest by way of the breather valve, If you were to drain the crank case, it would simply refill it self if the breather valve is not working properly. The window in the motor case that allows the breather to blow oil is often smaller than ideal and should be opened and squared per performance specifications available from $&$ and others.

Here is some breather timing information from S&S, it may not help, but it won't hurt either....

https://www.sscycle.com/docs/default-so ... f?sfvrsn=4

Do not check or refill a cold oil tank. Start the engine and let it run for a few minutes, and then check the oil level on the dip stick. Do not add oil above the Full mark.....
DaCs
Member
Posts: 217
Joined: Wed Sep 12, 2018 9:07 pm
Bikes: Panhead FL 1960
Has thanked: 22 times
Been thanked: 20 times

Re: Oil Pressure Gauge Fitting Chrome

#32

Post by DaCs »

RooDog wrote: Thu Sep 02, 2021 10:36 pm I don't remember what the "seal" should be on an engine with a splined shaft, but It would probably be a good idea to use an aftermarket rubber lip seal with a smooth spacer on the shaft since you are running a belt.

There would be no point in removing the drain plug, even if you could. The engine should purge that oil in the crank case over to the cam chest by way of the breather valve, If you were to drain the crank case, it would simply refill it self if the breather valve is not working properly. The window in the motor case that allows the breather to blow oil is often smaller than ideal and should be opened and squared per performance specifications available from $&$ and others.

Here is some breather timing information from S&S, it may not help, but it won't hurt either....

https://www.sscycle.com/docs/default-so ... f?sfvrsn=4

Do not check or refill a cold oil tank. Start the engine and let it run for a few minutes, and then check the oil level on the dip stick. Do not add oil above the Full mark.....
Thanks RooDog

You are taking about change seal 24031-55 for maybe this 7410-1 Colony? Whats the difference? both have seals but I really dont know how it works. It need and outer space or something else if I use the new one?

Regards
RooDog
Senior Member
Posts: 5327
Joined: Tue Oct 31, 2017 1:00 pm
Bikes: 1950 Panhead, Resto-Mod
1968 90", 5 Speed Shovelhead,
1984 Home Built Custom Evo 100" Bagger
Location: Knoxville, Tennessee
Has thanked: 2801 times
Been thanked: 2158 times

Re: Oil Pressure Gauge Fitting Chrome

#33

Post by RooDog »

The OEM # 24031-55 is just a worm, it screws oil back into the engine. In 1955 the MoCo wasn't too concerned with being oil tight.
The Colony Part , #7410-1, has an actual replaceable rubber lip seal, and works fairly well....
I just took pics if you want better pics than the catalogs show....
....RooDog....
Last edited by RooDog on Fri Sep 03, 2021 12:36 am, edited 1 time in total.
DaCs
Member
Posts: 217
Joined: Wed Sep 12, 2018 9:07 pm
Bikes: Panhead FL 1960
Has thanked: 22 times
Been thanked: 20 times

Re: Oil Pressure Gauge Fitting Chrome

#34

Post by DaCs »

RooDog wrote: Fri Sep 03, 2021 12:24 am The OEM # 24031-55 is just a worm, it screws oil back into the engine. In 1955 the MoCo wasn't too concerned with being oil tight.
The Colony Part , #7410-1, has an actual replaceable rubber lip seal, and works fairly well....
I think I have one if you want better pics than the catalogs show....
....RooDog....
Yes, if you could gimme a picture for reference or part number it will help me so much. I dont need to put any spacer, etc between sprocket and new seal?

Thanks
RooDog
Senior Member
Posts: 5327
Joined: Tue Oct 31, 2017 1:00 pm
Bikes: 1950 Panhead, Resto-Mod
1968 90", 5 Speed Shovelhead,
1984 Home Built Custom Evo 100" Bagger
Location: Knoxville, Tennessee
Has thanked: 2801 times
Been thanked: 2158 times

Re: Oil Pressure Gauge Fitting Chrome

#35

Post by RooDog »

The seal screws into the engine case inplace of the factory bearing retainer. Colony Part # 7410-1 Left hand thread. Use your original spacers....
DSC03321.JPG
DSC03321.JPG (115.41 KiB) Viewed 643 times
DSC03322.JPG
DSC03322.JPG (133.5 KiB) Viewed 643 times
DSC03323.JPG
DSC03323.JPG (130.37 KiB) Viewed 643 times
DSC03324.JPG
DSC03324.JPG (121.72 KiB) Viewed 643 times
DSC03325.JPG
DSC03325.JPG (143.59 KiB) Viewed 643 times
DaCs
Member
Posts: 217
Joined: Wed Sep 12, 2018 9:07 pm
Bikes: Panhead FL 1960
Has thanked: 22 times
Been thanked: 20 times

Re: Oil Pressure Gauge Fitting Chrome

#36

Post by DaCs »

RooDog wrote: Fri Sep 03, 2021 12:42 am The seal screws into the engine case inplace of the factory bearing retainer. Colony Part # 7410-1 Left hand thread. Use your original spacers....
DSC03321.JPGDSC03322.JPGDSC03323.JPGDSC03324.JPGDSC03325.JPG
RooDog, its the same seal I install! I was thinking that you tell that was the incorrect. Im more confused no

Thanks
RooDog
Senior Member
Posts: 5327
Joined: Tue Oct 31, 2017 1:00 pm
Bikes: 1950 Panhead, Resto-Mod
1968 90", 5 Speed Shovelhead,
1984 Home Built Custom Evo 100" Bagger
Location: Knoxville, Tennessee
Has thanked: 2801 times
Been thanked: 2158 times

Re: Oil Pressure Gauge Fitting Chrome

#37

Post by RooDog »

You have some other problem if the crank case is flooded to the point that it is running out the sprocket bearing hole. It is called a "dry sump system" for a reason. Again, and then I'm through, there is something amiss with the breather valving.....
Andygears
Senior Member
Posts: 1396
Joined: Tue Feb 05, 2013 12:25 am
Bikes: 1950 panhead, 1999 FLHTCI, 1987 FLHTC custom
Location: Daytona Beach
Has thanked: 438 times
Been thanked: 648 times

Re: Oil Pressure Gauge Fitting Chrome

#38

Post by Andygears »

Well, it seems there is something wrong with the breather timing-the oil goes thru the connecting rods and drains from the top end and collects at the bottom of the crankcase-And then is stuck to the flywheels and brought up to the case area behind the round tube breather valve. When the pistons go down, pressure is created and pushes the oil through the screen in the breather valve to the camshaft side area.

The removal of oil through the breather is not happening on your engine.

Try these things: hold your thumb over the breather hose while it runs, the hose by the belt in Roo Dog’s picture. It should have very little pressure. A lot of pressure may be a new head gasket leaking engine compression into the oil return passage at the junction of head and cylinder. This is not common.
More often the breather is timed incorrectly. The cam cover must be removed to check that. Follow the service manual to take out the pushrods, hold the lifters up with rubber bands or clothespins, and remove brake pedal to take off the cover. Turn the engine over slowly check the marks on all the gears are lined up at the same time.
If they appear aligned, remove the breather tube and examine it. Make sure the screen and the inner hole are clear. Remove the spark plugs and turn the engine over, the oil in your crankcase should come up into the breather hole that you took the tube out of. Report back.

Andygears
DaCs
Member
Posts: 217
Joined: Wed Sep 12, 2018 9:07 pm
Bikes: Panhead FL 1960
Has thanked: 22 times
Been thanked: 20 times

Re: Oil Pressure Gauge Fitting Chrome

#39

Post by DaCs »

Just to verify, the breather that I should have placed would have to be 25313-73, right? I have seen some with one hole and two, apart from the screen. or do you recommend someone else? This week I am going to check that this corresponds, I am thinking that perhaps the one that had the bike is not the correct one and that they have changed it like many others pieces that I had to change, could it be possible that this happened maybe a modern one?

Regards
RUBONE
Moderator
Senior Member
Posts: 8378
Joined: Sat Nov 15, 2008 4:09 am
Bikes: Multiple H-D, Ducati, BMW, Triumph, BSA,...
Has thanked: 478 times
Been thanked: 2933 times

Re: Oil Pressure Gauge Fitting Chrome

#40

Post by RUBONE »

RooDog wrote: Fri Sep 03, 2021 12:42 am The seal screws into the engine case inplace of the factory bearing retainer. Colony Part # 7410-1 Left hand thread. Use your original spacers....
DSC03321.JPGDSC03322.JPGDSC03323.JPGDSC03324.JPGDSC03325.JPG
Yikes, those punch marks make me cringe...... :shock:
RooDog
Senior Member
Posts: 5327
Joined: Tue Oct 31, 2017 1:00 pm
Bikes: 1950 Panhead, Resto-Mod
1968 90", 5 Speed Shovelhead,
1984 Home Built Custom Evo 100" Bagger
Location: Knoxville, Tennessee
Has thanked: 2801 times
Been thanked: 2158 times

Re: Oil Pressure Gauge Fitting Chrome

#41

Post by RooDog »

Robbie....
Cringe if you will, that's how I got it out...
And you have never used a punch when the proper tooling wasn't available?
....RooDog....
DaCs
Member
Posts: 217
Joined: Wed Sep 12, 2018 9:07 pm
Bikes: Panhead FL 1960
Has thanked: 22 times
Been thanked: 20 times

Re: Oil Pressure Gauge Fitting Chrome

#42

Post by DaCs »

Before opening the gear case I found another breather in my spares box. Does anyone know if it corresponds to panhead o(1961) or if that kind of "clasp" in the mesh benefits something? in addition to 2 body holes, one large and one small. A oem maybe? V-twin replica or s&s? As I remerber, the one installed (i will post a picture) is just a breather with mesh and 1 or 2 small holes. Wich one works better?

Regards


Image
Image
Image
RooDog
Senior Member
Posts: 5327
Joined: Tue Oct 31, 2017 1:00 pm
Bikes: 1950 Panhead, Resto-Mod
1968 90", 5 Speed Shovelhead,
1984 Home Built Custom Evo 100" Bagger
Location: Knoxville, Tennessee
Has thanked: 2801 times
Been thanked: 2158 times

Re: Oil Pressure Gauge Fitting Chrome

#43

Post by RooDog »

Here is some info for the $&$ breather valve :

https://www.revzilla.com/motorcycle/ss- ... 1948-e1977, in 1978 the gear tooth profiles changed.....

The long slotted hole toward the open end is to evacuate the oil trap chamber below the breather valve's location.
The metal clip on your valve is a retainer for the mesh screen. I removed the clip, tack welded the screen in place, and drilled alternating holes oversize to help the breather blow better in my stroker motor.
DSC03074.JPG
DSC03074.JPG (168.69 KiB) Viewed 546 times
The smaller hole toward the gear end may be to evacuate the chain case, aluminum primary, is of no concern in our app....
....RooDog....

https://www.ozbike.com.au/harley-davids ... explained/
DaCs
Member
Posts: 217
Joined: Wed Sep 12, 2018 9:07 pm
Bikes: Panhead FL 1960
Has thanked: 22 times
Been thanked: 20 times

Re: Oil Pressure Gauge Fitting Chrome

#44

Post by DaCs »

RooDog wrote: Tue Sep 07, 2021 1:06 pm Here is some info for the $&$ breather valve :

https://www.revzilla.com/motorcycle/ss- ... 1948-e1977, in 1978 the gear tooth profiles changed.....

The long slotted hole toward the open end is to evacuate the oil trap chamber below the breather valve's location.
The metal clip on your valve is a retainer for the mesh screen. I removed the clip, tack welded the screen in place, and drilled alternating holes oversize to help the breather blow better in my stroker motor.

DSC03074.JPG

The smaller hole toward the gear end may be to evacuate the chain case, aluminum primary, is of no concern in our app....
....RooDog....

https://www.ozbike.com.au/harley-davids ... explained/
Thanks Roodog

It possible that align mark change by years or brands?

Just to know that maybe I have a incorrect breather inside engine.
RooDog
Senior Member
Posts: 5327
Joined: Tue Oct 31, 2017 1:00 pm
Bikes: 1950 Panhead, Resto-Mod
1968 90", 5 Speed Shovelhead,
1984 Home Built Custom Evo 100" Bagger
Location: Knoxville, Tennessee
Has thanked: 2801 times
Been thanked: 2158 times

Re: Oil Pressure Gauge Fitting Chrome

#45

Post by RooDog »

A quick shade tree method would be to check that the breather window is opening as the pistons begin to travel down, and is closed as the pistons begin to travel upward. The valve is timed 1:1 with the crank unlike the cam which is 1/2 crank speed. The timing marks never changed from the 1930s til the end of the Evos, but there is always a chance for error.....
....RD....
Post Reply

Return to “Panhead”