RSR Rocker seal install questions

[Lyndon302]

I know this has been done to death.
I've decided to fit them to my sixty seven 911.
Dry they go in the thin side. Thru the rocker and into the thick side.
This is three entry points for it and is an interference fit.
With a trial run its been nicked. I would say it's impossible to get it perfect. ?
Consensus is they should be dry. ??
I even warmed the cam tower up to expand it.
What's the trick from those who have been there and done it.
Thanks Lyndon

[dannobee]

Never tried them dry. Use DC 111 or something similar. Or plain engine oil if you don't have o-ring lube.

[Mark Henry]

Only real trick I know is I carefully broke the bores sharp edge when I had the towers apart.
I tried with lube and a couple shafts worked loose, so far having better luck with a dry shaft install.

[Lyndon302]

Originally Posted by Mark Henry

Only real trick I know is I carefully broke the bores sharp edge when I had the towers apart.
I tried with lube and a couple shafts worked loose, so far having better luck with a dry shaft install.

Dry with no seals ??

[Mark Henry]

Originally Posted by Lyndon302

Dry with no seals ??

Dry with seals, there's no way to lube the seals and still do a dry install.
YMMV but seems to have worked for me.

[Lyndon302]

I think I have solved it.
I have reamed the bore entrance x 2 with My aircraft debuting tool .Then 400 the edges.
Then a sacrificial shaft and place in each rocker bore for a test fit. Pushing in one direction only. Thin side first.
I have done this with the cam tower heated or warm.
Chuck that rocker shaft in the bin.
Ok the orings go in dry and perfect. Upon assembley. One direction only. Rocker shaft in the freezer. Hot gun rocker bore for individual assembly.
Lyndon

[gsxrken]

Can you elaborate or include a few pics of what tool you mean here:

“I have reamed the bore entrance x 2 with My aircraft debuting tool .Then 400 the edges.“

ON EDIT- got it- didn’t know that first pic was a drill bit. Seems like a good idea

[Mark Henry]

It's what's also known as a countersink bore bit, in his first pic.

Good job, did you just spin it with your fingers or did you run a driver down the cam bore?

[mikedsilva]

Seems like a good idea. I don't know why I have not done this in the past. It wouldn't take much.. just enough to take the sharp corner off, so the o ring can be compressed by the cam tower.

I always install the shaft and o rings DRY.

Then lube through the oiling holes top and bottom. Turn motor upside down, etc.. give it all plenty of time for the oil to wick into the rocker shaft.

[Lyndon302]

https://www.aircraftspruce.com/pages/to/sheet_deburring_0deburring/deburringbit2-03755.php
Mine is part of my kit I use to debur aircrsft i used a 19 mm one with a long bar to get in deep as you only come.from one direction. The thin side.
Each bore only needs 2 edges done as once you enter with your shaft you don't go backwards. Your committed to push out the the other end.
A sheet of 400 with some wd40 rolled is perfect as the tool will leave a lip. Its more left over aluminium than an lip. But if not removed the shaft will pick it up and score the bore.
I can't stress the test fit first in one direction.
It needs to be heated and the shaft cooled so it can be inserted by hand and you can feel it.
Some one had forced my other cam tower shafts and they picked up swarf and thus damaged the bore. It leaked and is now in the bin. I also cleaned up the entry point on the rockers.
The tool fits in every bore and used a drill to lightly clean in up.
With hindsight a good cam tower would be fine without these seals. One not so good would certainly benefit from these.
Lyndon