Re: Stuck exhaust valve (Ranger)

robert Etter · Post by **robert Etter** » Sun Jul 10, 2005 6:47 pm

'I know your meaning. I had it pretty easy with the Franklin. You would
need to dismantle almost the entire lower part of the motor. What really
got my attention was how firmly stuck the valves were. They were staying
open up to 1/8"-1/4". On start up, I would have 3 cylinders firing, and 3
doing little or nothing. It really did shake. After 1-1 1/2" minutes of
shaking, at 1500-2000 rpm, I would get heat built up, then the 3 bad
cylinder would start firing.
I wish the best of luck. It would be nice to find something that would
clean off the valve guides.

Bob Etter
PO Box 974
Tonopah, NV 89049
775-482-6820
rletter@citlink.net'

John Amundsen · Post by **John Amundsen** » Mon Jul 11, 2005 12:21 am

'If you could get some Mouse Milk on the valve stem, it might dissolve the build up. It works in turbo chargers.

----- Original Message -----
From: Robert Etter
To: fairchildclub@yahoogroups.com
Sent: Sunday, July 10, 2005 4:46 PM
Subject: Re: [fairchildclub] Stuck exhaust valve (Ranger)

I know your meaning. I had it pretty easy with the Franklin. You would
need to dismantle almost the entire lower part of the motor. What really
got my attention was how firmly stuck the valves were. They were staying
open up to 1/8"-1/4". On start up, I would have 3 cylinders firing, and 3
doing little or nothing. It really did shake. After 1-1 1/2" minutes of
shaking, at 1500-2000 rpm, I would get heat built up, then the 3 bad
cylinder would start firing.
I wish the best of luck. It would be nice to find something that would
clean off the valve guides.

Bob Etter
PO Box 974
Tonopah, NV 89049
775-482-6820
rletter@citlink.net

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'

ranger440c5 · Post by **ranger440c5** » Mon Jul 11, 2005 7:41 pm

'Wild hairbrain thought.....has anyone tried a firearms bore solvent
on valve deposits? Gun barrels are subject to high heat, pressures,
lead and copper fouling, corrosive gasses, lots of goofy chemical
compounds. They are in metals from low carbon steels, 4140 forgings,
to forged and cast stainless. A bore solvent like ol' Hoppes #9
combined with mild mechanical cleaning tends to remove much of the
compounds and are gentle on the metals. The big question would be the
reaction to aluminum piston......thoughts?
Also, if you do tear down to the valve, double check the spring
pressure. Perhaps it is weak and not enough pressure to close valve.
This can be a particular problem when valve "floats" or "rebounds"
off seat after closing....it has maximum pressure at the apex of cam
lobe and successfully closes valve after rocker roller gets down to
lobe base diameter. However, if at higher RPM the valve can smack the
seat and bounce open, especially if spring(s) are weak. At this point
the valve may only reopen 1/8" or so and a weak spring has even less
authority as it is barely deflected and cannot override friction in
guide.

--- In fairchildclub@yahoogroups.com, "John Amundsen"
wrote:

> If you could get some Mouse Milk on the valve stem, it might

dissolve the build up. It works in turbo chargers.

> ----- Original Message -----
> From: Robert Etter
> To: fairchildclub@yahoogroups.com
> Sent: Sunday, July 10, 2005 4:46 PM
> Subject: Re: [fairchildclub] Stuck exhaust valve (Ranger)
>
>
> I know your meaning. I had it pretty easy with the Franklin.

You would

> need to dismantle almost the entire lower part of the motor.

What really

> got my attention was how firmly stuck the valves were. They were

staying

> open up to 1/8"-1/4". On start up, I would have 3 cylinders

firing, and 3

> doing little or nothing. It really did shake. After 1-1 1/2"

minutes of

> shaking, at 1500-2000 rpm, I would get heat built up, then the 3

bad

> cylinder would start firing.
> I wish the best of luck. It would be nice to find something that

would

> clean off the valve guides.
>
> Bob Etter
> PO Box 974
> Tonopah, NV 89049
> 775-482-6820
> rletter@c...
>
>
>
> --------------------------------------------------------------------

----------

> YAHOO! GROUPS LINKS
>
> a.. Visit your group "fairchildclub" on the web.
>
> b.. To unsubscribe from this group, send an email to:
> fairchildclub-unsubscribe@yahoogroups.com
>
> c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms

of Service.

>
>
> --------------------------------------------------------------------

----------

>
>
>
> [Non-text portions of this message have been removed]

'

robert Etter · Post by **robert Etter** » Tue Jul 12, 2005 9:18 pm

'I tried mouse milk on the Franklin as well. It didn't work for me. Maybe
the milk had gone sour.

I even went so far as to try a heavy diet of Jet A, about a gallon 1/2 & 1/2
100 Octane. The exhaust was notably dark, but it ran quite smooth. It
only made the motor stink like a turbine.

What seemed strange about the build-up on the valve guides, was it wasn't
bonded to the valve guide very well. Just a little point pressure fractured
it. It was like the hard crust over the top of some mud.

Bob Etter
PO Box 974
Tonopah, NV 89049
775-482-6820
rletter@citlink.net'