Exhaust valve body seals

[nevadacowboy]

I had a problem today with air leaking out the barrel so I changed al the seals.  The size I have for the tail seal on the valve body is 4.1 x 1.6mm.  Is this the correct size as it was very difficult to fit.  Is there a tool similar to the mfr push pin seal tool that would make this job easier?


PS: I cured the leak.

[KevG]

yes they are a little tough to fit.but only need to be ni70.if they are ni90 they would be very hard to get on.i don't bother with a tool as its easy enough with out m8.
KevG

[nevadacowboy]

There must be a knack to it Kev as I found it very difficult. Make me a tool please, I like an easy life.

[angrybear]

I find the plastic toothpicks from Sainsburys very handy for digging out seals 

[Ca_Varminter]

Like they say.......
A little Lube helps in a tight squeeze!!
I always apply a little Molykote on my O-ring whin I fit Them!!
Make them more pliable...
Then just start on ones side, roll it over the edge with your Thumb!

Good Luck,
Stuart

[mnementh]

You could also try heating the O ring up a LITTLE bit.

50 - 60 degrees will make it much more flexible.

Apply Molykote affter.

Be aware excessive heat for a sustained period WILL harden it, not soften.

Sandy

[KevG]

could make a tube but to be honest will be nearly as hard getting it on the tool as the valve tail.70 shaw should go on ok.
kevG

[KCE]

Would this little tool work.

Regards kev.

[Ca_Varminter]

OK Rapid Minions...

Are you are have trouble installing that Valve-body tail O-ring???

Here is a little tool I just turn on my Lathe...
Valve-Body Tail O-ring installation Tool....
I made it out black Delrin.
Front end is turned down to the same size as a Valve-stem's Stem.
The Back end is the same diameter as the Tail of the Valve-body, but with a a gentle 5° taper on the end

So just slide the small end into the tail of the Valve-body.
Then grease up a tail O-ring and slip over the tapered end of the tool.
Then just roll her home!!
EZ
I only use D90A (hard) O-rings in my rapids!









If you think this can help you.... Give KevG a Call.... I am sure he could turn few of these on his Lathe!!

Stuart

[nevadacowboy]

Over to you @KevG. Happy to pay cost and postage.

[KevG]

knocked you one up m8.send me your address and will pop it in post tomorrow
KevG

[nevadacowboy]

Thanks Kev.


You have PM.


Bob