Topic: HD studs in F2 engine

[voxonda]

Hey guys, need some help here.

First time working with a F2 ('78) engine. Use to K2-K6 engines. When installing the HD studs cannot use the 4 o-rings(size 5.5x3) that are on the studs next to the oil return studs. #6 item on picture. The older engines do not have them.

Should I look for replacements or can I drop them?

Thanks, Rob

[simon#42]

i didnt bother with them , in fact when i striped the engine  they were not there , i spoke to the previous owner and he told me the engine had never been apart . having seen that picture i was slightly concerned about oil leaks but its done 20,000 miles since then with no problems , did your engine have the o rings rob?

[voxonda]

Hey Simon,

Yes, it did. But it wonders me what the function is of the rings. Think to avoid oil creeping up.

Thanks for your info,

Rob

[Gonzowerke]

Both my '78K and '77F had them. I think my '77F Bike-in-a-box had them too. The F has an 836 kit though, so that might not be any indication. The K, however, is different. I am the documented third owner, and from what I saw, I am the only one to ever get in the engine, so they are "Fuctory" as a mechanic friend of mine would say.

[voxonda]

Thanks Gonzowerke and Simon,

Did find some new Ø8 x 2.0 O-rings in my shop and will use these.

Cheers, Rob

[simon#42]

hi rob , i was going to do something similar but [ from my poor memory ] i think they interfered with the base gasket , i am well aware that you know your stuff , but just check please!

[voxonda]

Hey Simon,

Found o-rings in my shop, both Ø7x2 and Ø8x2. Using the Ø7x2 fills up the taper of the block and doesn't interfere with the basegasket. The Ø8 are a bid 'sloppy' around the studs.
Will let you know how it works once I mounted and started the engine.

Cheers, mate.

[simon#42]

thanks

[brandEn]

Hey Simon,

Found o-rings in my shop, both Ø7x2 and Ø8x2. Using the Ø7x2 fills up the taper of the block and doesn't interfere with the basegasket. The Ø8 are a bid 'sloppy' around the studs.
Will let you know how it works once I mounted and started the engine.

Cheers, mate.

Hey Rob, did you ever have any oil leaks? Getting ready to assemble my 836 and F3 head and wondering about those o-rings.

[voxonda]

Hey BWJ,

No oilleaks what so ever. Engine as dry as the clutch it has.

Cheers, Rob

[brandEn]

Thanks! Now hopefully no leaks for me.