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Crank case gaskets
Page 1 of 1
Crank case gaskets
SuperDave Tue Sep 13, 2011 9:19 am
GermanBeez wrote:yep. i will delete this topic in maybe 4 days or so. if he hasn't taken a look again, tough luck.
just trying to keep the number of "engine won't work"- topics at bay a little. just a housekeeping procedure.
The speculations offered here might be useful to draw in some of the "lurkers into joining the forum.
As to speculations, I would offer the matter of the venturi gasket which is so often overlooked in such problems.
SD
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Re: Crank case gaskets
SuperDave Tue Sep 13, 2011 9:57 am
beez:
A bad or missing venturi gasket will most surely cause fuel-starvation problems as described here.
BTW, the Sure-Start does NOT have a carburetor.
You might note the two types of Cox fuel induction systems: reed and rotary valve as found on the Cox TEE DEE series.
SD
Certified Coxaholic
A bad or missing venturi gasket will most surely cause fuel-starvation problems as described here.
BTW, the Sure-Start does NOT have a carburetor.
You might note the two types of Cox fuel induction systems: reed and rotary valve as found on the Cox TEE DEE series.
SD
Certified Coxaholic
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Re: Crank case gaskets
nitroairplane Tue Sep 13, 2011 11:36 am
And rear rotary or drum valve found on the rr1.
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Re: Crank case gaskets
GermanBeez Tue Sep 13, 2011 1:29 pm
i thought you were referring to the tee dee 020...SuperDave wrote:
As to speculations, I would offer the matter of the venturi gasket which is so often overlooked in such problems.
SD
and yes, i do know that the engine series differed mainly in their intake system. i'm not that new to the hobby
as everyone appearently thinks.
ok, i will leave this topic open for reference, but i would ask everyone to only post something if it has something
to do with the sure start issue, as the discussion on top is running off topic. thank you for your consideration.
Dave
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Re: Crank case gaskets
RknRusty Tue Sep 13, 2011 4:07 pm
A Surestart has no venturi gasket.
But a leaky crankcase gasket could cause a similar problem.
But a leaky crankcase gasket could cause a similar problem.
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Re: Crank case gaskets
GermanBeez Tue Sep 13, 2011 4:20 pm
sigh....are we finished with the darn gaskets already! 
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Re: Crank case gaskets
SuperDave Tue Sep 13, 2011 4:29 pm
GermanBeez wrote:sigh....are we finished with the darn gaskets already!
beez:
Your impatience is quite evident. Most two-strokers rely on crankcase pressure to induce fuel into the cylinder.
" Ya snooze, ya loose" SD
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Re: Crank case gaskets
microflitedude Tue Sep 13, 2011 4:47 pm
RknRusty wrote:A Surestart has no venturi gasket.
But a leaky crankcase gasket could cause a similar problem.
Isn't it only tanked engines that have those?
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Re: Crank case gaskets
nitroairplane Tue Sep 13, 2011 5:04 pm
Yes only engines that have metal to metal contact.
Not tee dee .010 or .020.
Not tee dee .010 or .020.
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Re: Crank case gaskets
SuperDave Wed Sep 14, 2011 9:04 am
HOLY SOCKS, BATMAN!
Considering the age related-deterioration potential of Cox gaskets, I make it a standard practice to replace all of them when "refreshening" any COX. So doing is an assurance they are actually present and not the cause of any run problem.
In the Surestart "no start" discussion the poster reported that the head gasket was missing and the engine wouldn't start. Well DUH?
Most often the most elementary of considerations are overlooked in the diagnosis of mechanical problems. A good diagnostician is very thoughtful in this regard.
Robin (aka: SD)
Considering the age related-deterioration potential of Cox gaskets, I make it a standard practice to replace all of them when "refreshening" any COX. So doing is an assurance they are actually present and not the cause of any run problem.
In the Surestart "no start" discussion the poster reported that the head gasket was missing and the engine wouldn't start. Well DUH?
Most often the most elementary of considerations are overlooked in the diagnosis of mechanical problems. A good diagnostician is very thoughtful in this regard.
Robin (aka: SD)
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Re: Crank case gaskets
GermanBeez Wed Sep 14, 2011 9:14 am
ehm, i just looked over what the topic's poster said about the engine. he did not say his gasket was missing...SuperDave wrote:HOLY SOCKS, BATMAN!
In the Surestart "no start" discussion the poster reported that the head gasket was missing and the engine wouldn't start. Well DUH?
Robin (aka: SD)
but that could most certainly be a reason. my golden bee came without one, i have no idea how the guy who had it before
got it to run, because the compression was WAY too high. good thing that Matt has stocked me up with all the essential
parts which can wear out ( venturi gaskets, crank case gaskets, cylinder head gaskets, reeds, etc...)
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Re: Crank case gaskets
SuperDave Wed Sep 14, 2011 9:44 am
beez:
OK, I refenced the incorrect engine problem post yet my comments are no less valid.
SD
OK, I refenced the incorrect engine problem post yet my comments are no less valid.
SD
GermanBeez wrote:ehm, i just looked over what the topic's poster said about the engine. he did not say his gasket was missing...SuperDave wrote:HOLY SOCKS, BATMAN!
In the Surestart "no start" discussion the poster reported that the head gasket was missing and the engine wouldn't start. Well DUH?
Robin (aka: SD)
but that could most certainly be a reason. my golden bee came without one, i have no idea how the guy who had it before
got it to run, because the compression was WAY too high. good thing that Matt has stocked me up with all the essential
parts which can wear out ( venturi gaskets, crank case gaskets, cylinder head gaskets, reeds, etc...)
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Re: Crank case gaskets
GermanBeez Wed Sep 14, 2011 10:00 am
hmmm, you might just want to add your solution about the missing head gaskets to the sure start topic, so
people who visit the site have everything that could be wrong with their engine on one site! i think its amazing how
a piece of copper the thickness of a human hair can alter the compression of an engine that much.
people who visit the site have everything that could be wrong with their engine on one site! i think its amazing how
a piece of copper the thickness of a human hair can alter the compression of an engine that much.
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Re: Crank case gaskets
nitroairplane Wed Sep 14, 2011 10:14 am
I find it amazing that a piston as thin as a wire can make power.
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Re: Crank case gaskets
SuperDave Wed Sep 14, 2011 10:20 am
nitroairplane wrote:I find it amazing that a piston as thin as a wire can make power.
The theoretical and the practical often don't mesh even on a grander scale. Ask any engineer.
SD
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Re: Crank case gaskets
nitroairplane Wed Sep 14, 2011 10:31 am
SuperDave wrote:nitroairplane wrote:I find it amazing that a piston as thin as a wire can make power.
The theoretical and the practical often don't mesh even on a grander scale. Ask any engineer.
SD
the ronald valentine nano bee is 0.006cc or 0.00039 cuin imagine that piston.
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Re: Crank case gaskets
RknRusty Wed Sep 14, 2011 12:29 pm
Now we are. Before my post there were two references to the nonexistent venturi Gasket and no mention of the Crankcase gasket. So I made one correction and one suggestion.GermanBeez wrote:sigh....are we finished with the darn gaskets already!
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Re: Crank case gaskets
GermanBeez Wed Sep 14, 2011 12:33 pm
and split up the previous topic so we could talk gaskets all night and day long!
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Re: Crank case gaskets
SuperDave Wed Sep 14, 2011 12:40 pm
[quote="RknRusty"]
On which Cox engine? I repectfully ask.
SD
Coxaholic
GermanBeez wrote: "the nonexistent venturi Gasket "
On which Cox engine? I repectfully ask.
SD
Coxaholic
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Re: Crank case gaskets
RknRusty Wed Sep 14, 2011 12:44 pm
[quote="SuperDave"]
Maybe I'm mixed up about which engine we're talking about.
The Surestart has no venturi gasket. That's the engine the guy was asking about iirc. Air goes in the back past the spraybar and right into the reed valve.RknRusty wrote:GermanBeez wrote: "the nonexistent venturi Gasket "
On which Cox engine? I repectfully ask.
SD
Coxaholic
Maybe I'm mixed up about which engine we're talking about.
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