That's oil temp, I don't have a CHT.
I use Avgas. I have not been adding TCP, but I did after the trip home
from Wausau. The mixture does work, but I have not been using it
regularly, just when I need to clear a fouled plug, which rarely
happens. I haven't looked at the plugs yet. The oil is about 22 hours
old and it's Exxon Elite 20W50.
Larry Snyder
[EMAIL PROTECTED]
On Aug 8, 2008, at 7:54 PM, Al Demarzo wrote:
Hello Larry;
The temps you mention, are they CHT's or maybe oil temp? I'll
assume oil temp and really have no comment about that but will ask a
few questions about the cylinder to determine a possible cause.
Are you using auto fuel or Avgas or a mix? If Avgas, do you use TCP
in the fuel if avgas? Is your mixture control working and if so, do
you lean also on the ground? Have you pulled plugs on the suspect
cylinder? How old is the oil and what grade are you using?
Thanks
Al DeMarzo
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----- Original Message -----
From: Larry Snyder
To: Ercoupe Tech List
Sent: Friday, August 08, 2008 7:37 PM
Subject: [ercoupe-tech] Sticking Valve
Dear tech heads,
When we flew up to Wausau, we flew with the engine at about 205
degrees most of the way, but it crept up to 215 briefly on a climb.
When we started the plane up to leave on Sunday, we were running on
only 3 cylinders. After about a minute, though, it cleared up and ran
fine all the way home (it's about 5 1/2 hours each way). I went out a
few nights ago to get night current, and it did the same thing. I went
out today and pulled it through and the last turn showed no
compression. I warmed it up (it ran roughly) and suddenly all was well
again. I stopped the engine and pulled it through and voila -
compression on all 4 cylinders.
I talked to the local mechanic, and he said that I should put Avblend
in the oil and fly for an hour or so to clean up the valve stems and
guides, so I did. I'll go out tomorrow when it's cold and pull it
through again, seeing if the valve is stuck again. If it is, I presume
the guide needs to be reamed?
Is this where the rope is used to keep the valve in place? How does
that work? Or is it better to just pull the jug? I understand that the
valve stem is sticking in the guide, I guess I'm not sure I understand
the logistics of reaming the guide without removing the cylinder.
Also, when I landed this afternoon, it was hot, and I would get a
backfire when I when from full throttle to idle. What could cause
that?
Thanks!
Larry Snyder
N99340
