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Cox Engine of The Month
Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
Page 23 of 31
Page 23 of 31 • 1 ... 13 ... 22, 23, 24 ... 27 ... 31
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
mmmmmm
i do use the little copper gasket under the head
(gasket-teflo-head)
mind does not get lose
but becaus of the teflon i can turn it tighter and tighter
until the telflon is squeesed out of underneed the head
i do use the little copper gasket under the head
(gasket-teflo-head)
mind does not get lose
but becaus of the teflon i can turn it tighter and tighter
until the telflon is squeesed out of underneed the head
robot797- Platinum Member
- Posts : 787
Join date : 2013-07-28
Age : 34
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
robot797 wrote:mmmmmm
i do use the little copper gasket under the head
(gasket-teflo-head)
mind does not get lose
but becaus of the teflon i can turn it tighter and tighter
until the telflon is squeesed out of underneed the head
Sound like a good idea but where have you found this copper gasket? Have you made this yourself?
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
it should have come with the engine
all mine do have it
http://coxengines.ca/cox-.049-glow-head-gasket-3.html
all mine do have it
http://coxengines.ca/cox-.049-glow-head-gasket-3.html
robot797- Platinum Member
- Posts : 787
Join date : 2013-07-28
Age : 34
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
robot797 wrote:it should have come with the engine
all mine do have it
http://coxengines.ca/cox-.04t9-glow-head-gasket-3.html
Diesels do not come with this gasket but looks OK. I hope I dont forget to get some with the new cranks.
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
mmmmm weird
becaus if you look at the diesel head guids
it clearly stated that one does need it (becaus they dont come shipped with it)
that is if i understand it correctly
http://coxengines.ca/diesel-head-conversion-for-cox-049.html
isnt it just stuck to the top of your cylinder
normaly it should look black
if yours looks copper then you have found yours
becaus if you look at the diesel head guids
it clearly stated that one does need it (becaus they dont come shipped with it)
that is if i understand it correctly
http://coxengines.ca/diesel-head-conversion-for-cox-049.html
isnt it just stuck to the top of your cylinder
normaly it should look black
if yours looks copper then you have found yours
robot797- Platinum Member
- Posts : 787
Join date : 2013-07-28
Age : 34
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
robot797 wrote:mmmmm weird
becaus if you look at the diesel head guids
it clearly stated that one does need it (becaus they dont come shipped with it)
that is if i understand it correctly
http://coxengines.ca/diesel-head-conversion-for-cox-049.html
isnt it just stuck to the top of your cylinder
normaly it should look black
if yours looks copper then you have found yours
Yes the diesel conversion kit says head gasket is not included.
The cylinder has a delimiting ring which does not allow the piston to go higher nor the Teflon gasket to go lower.
The piston best be reset so the piston does not bang in this ring which may create vibrations and repercussions to the crank pin although without a force.
I think the piston I have is OK still factory preset or looking like.
The thread is the only thing which prevents compression from leaking. Because the thread is very fine and there is a lot of thread, compression is not supposed to leak.
I think, however, because the delimiting ring is not very tall, posible is for the piston to either touch the Teflon gasket or go very near. No one else thinks so, though.
Also, the counter ring, as well as the piston seem to have a microscopic notch in the middle. Thus, the counterpiston must be positioned with the side without a noth towards the Teflon gasket.
I am not sure how Dupont made the Teflon gasket but, looks like, the Teflon is not very heat resistant. Thus, I think, even normal temperatures of the piston and the counterpiston may deform the Teflon gasket.
No one on the forum seems to want to discuss this and I do not know why.
One think for sure : don't even think of going high compression. The compression screw must always be able to move freely either way. Run the engine on low compression only and start at low compression.
For electric start, make sure the compression screw is one quarter unscrewed.
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
The cylinder has a delimiting
i never heard of this ring
and i have never seen one
and for the heat of teflon
teflon can handle verry high heat
that is why we use it in pans as a anti stick agent
but under constand pressure and suction it will tear
i wonder why there is no shop that sells metal disks
and for the counterpiston having a dimple
mine does not have one it is totaly flat
but mine is one of the firsth diesel bombers
i never heard of this ring
and i have never seen one
and for the heat of teflon
teflon can handle verry high heat
that is why we use it in pans as a anti stick agent
but under constand pressure and suction it will tear
i wonder why there is no shop that sells metal disks
and for the counterpiston having a dimple
mine does not have one it is totaly flat
but mine is one of the firsth diesel bombers
robot797- Platinum Member
- Posts : 787
Join date : 2013-07-28
Age : 34
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
robot797 wrote:The cylinder has a delimiting
i never heard of this ring
and i have never seen one
and for the heat of teflon
teflon can handle verry high heat
that is why we use it in pans as a anti stick agent
but under constand pressure and suction it will tear
i wonder why there is no shop that sells metal disks
and for the counterpiston having a dimple
mine does not have one it is totaly flat
but mine is one of the firsth diesel bombers
The notches are microscopic and can bearly be seen. Unlikely to do anything. However, Teflon is a nasty matetial. I have never seen a pot or pan where the Teflon would not wear after a few cookings. Scratches easily.
Metal gaskets instead of Teflon will preclude the protection of shattering.
The Teflon gaskets sits on the delimiting ring of the cylinder and does not fall into. Copper gasket, wider than the delimiter may help. Also any Copper gasket would lift the Teflon gasket. I am afraid a narrow Copper gasket may break and or fall into the cylinder.
In case your engine does not have any delimiter on what do you seat the Teflon and the Copper gaskets?
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
i have never heard or seen that ring on a cox engine
mine just sits on the head gasket
and that has the same internal size as the cylinder
mine just sits on the head gasket
and that has the same internal size as the cylinder
robot797- Platinum Member
- Posts : 787
Join date : 2013-07-28
Age : 34
How to Shut the Engine for a Restart
Most people I have seen shut the engines by closing the Air Valve ( Throttle ) thus stopping the air. I have also been doing so.
However, in case a restart is to be done, the best way is to open the compression screw until the engine shuts down. Thus, there would be fuel in the crankcase for the next restart.
Beware not to flood the engine, though. Rotate gently and slowly in the direction of rotation at extremely low compression to check for flooding.
With fuel in the crankcase, the engine can be restarted either at one or two compression through spring starts or full spring starts.
However, in case a restart is to be done, the best way is to open the compression screw until the engine shuts down. Thus, there would be fuel in the crankcase for the next restart.
Beware not to flood the engine, though. Rotate gently and slowly in the direction of rotation at extremely low compression to check for flooding.
With fuel in the crankcase, the engine can be restarted either at one or two compression through spring starts or full spring starts.
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
robot797 wrote:i have never heard or seen that ring on a cox engine
mine just sits on the head gasket
and that has the same internal size as the cylinder
And what does the head gasket sit on?
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
the cylinder
the same way as in all cox engines
exept the ones that have been run on heet mixed with castor
the same way as in all cox engines
exept the ones that have been run on heet mixed with castor
robot797- Platinum Member
- Posts : 787
Join date : 2013-07-28
Age : 34
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
robot797 wrote:the cylinder
the same way as in all cox engines
exept the ones that have been run on heet mixed with castor
Where on the cylinder. The cylinder is cylindric. Anything would fall through. There must be something inside to hold the Copper gasket.
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
as you can see from this picture
there is a rim under the treads of the glow/diesel head
there is the head gasket
not ontop of the piston or floating
there is a rim under the treads of the glow/diesel head
there is the head gasket
not ontop of the piston or floating
robot797- Platinum Member
- Posts : 787
Join date : 2013-07-28
Age : 34
The Fuel I Would Try Next
So far, I have been doing something wrong. I have been decreasing all fuel components by 1 to 2 percent to add Cetane Booster. Next, I would decrease the amount of Kerosene and put Cetane Booster instead of Kerosene.
Thus, the standard fuel would be : 40% Ether, 30% Kerosene, 25% Castor Oil, 5% Cetane Booster.
Because I use medical Castor Oil, I may even decrease the amount of Castor Oil to 20% and increase the amount of Ether to 45%.
Thus, the standard fuel would be : 40% Ether, 30% Kerosene, 25% Castor Oil, 5% Cetane Booster.
Because I use medical Castor Oil, I may even decrease the amount of Castor Oil to 20% and increase the amount of Ether to 45%.
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
i still dont use cetane boosters
not even for my russian mk17
not even for my russian mk17
robot797- Platinum Member
- Posts : 787
Join date : 2013-07-28
Age : 34
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
robot797 wrote:as you can see from this picture
there is a rim under the treads of the glow/diesel head
there is the head gasket
not ontop of the piston or floating
Exactly. I call this rim a delimiter or delimiting ring.
This is where I put the Teflon gasket. And, thanks to your help, I will probably put one or a few Copper gaskets there and, on top of them, I would put the Teflon gasket. I hope this would not only strenghten the Teflon gasket but lift up too not to touch the piston.
We have been talking the same things with different names. The rim stops the gaskets from falling and, I think, the piston grom going up.
When the compression screw is tightened, the lower than the rim diameter counterpiston pushes the Teflon gasket down which may bend and touch the piston. Hence the melting, thinning and punching.
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
lol
that is kind of anoying
but the puruse of the head gasket is not to stop the piston from touching things
it sets the combustion chamber and the ignition timing
the piston stops on the edge of the cylinder by itself
and if you turn the compression all the way up the gasget hits the piston
that is kind of anoying
but the puruse of the head gasket is not to stop the piston from touching things
it sets the combustion chamber and the ignition timing
the piston stops on the edge of the cylinder by itself
and if you turn the compression all the way up the gasget hits the piston
robot797- Platinum Member
- Posts : 787
Join date : 2013-07-28
Age : 34
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
robot797 wrote:lol
that is kind of anoying
but the puruse of the head gasket is not to stop the piston from touching things
it sets the combustion chamber and the ignition timing
the piston stops on the edge of the cylinder by itself
and if you turn the compression all the way up the gasget hits the piston
I will check the piston and the cylinder disassembled when I go home.
I now think when I try to push the piston into the cylinder by finger, the piston will be stoppod by the rim.
Cetane Booster is sold in every automotive shop in Holand and will make your engine sustain work better and give you more power.
In the UK, thet sel amil nitrate which is supposed to be better.
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
i dont think you got that right
more kerozene is more power
more ether is easyer starting
2% cetanebooster is for a stable run
i dont think the booster gives more power
more kerozene is more power
more ether is easyer starting
2% cetanebooster is for a stable run
i dont think the booster gives more power
robot797- Platinum Member
- Posts : 787
Join date : 2013-07-28
Age : 34
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
robot797 wrote:i dont think you got that right
more kerozene is more power
more ether is easyer starting
2% cetanebooster is for a stable run
i dont think the booster gives more power
I think the booster chemically reacts with the Kerosene to provide more power per compression. Just like putting a new, different fuel instead of Kerosene. I do not know whether the booster slows and evens the burning throughout the working cycle or, the opposite, makes the fuel more explosive. I know the booster makes Kerosene ignite faster and easier.
As far as Ether is concerned, true, Ether is for ignition and true, Ether makes the start easier. However, more Ether does also ensure a fuller Kerosene burning which means power.
Thus, I think the more the Ether the more the power UP TO A GIVEN POINT. The same as the bigger the spark the more the power up to a point with a standard gadoline engine.
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
StevenStanleyBayes wrote:robot797 wrote:lol
that is kind of anoying
but the puruse of the head gasket is not to stop the piston from touching things
it sets the combustion chamber and the ignition timing
the piston stops on the edge of the cylinder by itself
and if you turn the compression all the way up the gasget hits the piston
I will check the piston and the cylinder disassembled when I go home.
I now think when I try to push the piston into the cylinder by finger, the piston will be stoppod by the rim.
Cetane Booster is sold in every automotive shop in Holand and will make your engine sustain work better and give you more power.
In the UK, thet sel amil nitrate which is supposed to be better.
Checked the piston and the rim. Inserted the piston into the cylinder. Pushed the piston with a finger. The piston goes nice and easy up. Stops at the rim. Pushed more. Does not go through the rim.
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
then the cylinder it tapered
robot797- Platinum Member
- Posts : 787
Join date : 2013-07-28
Age : 34
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
robot797 wrote:then the cylinder it tapered
Again : the piston is stopped by the rim and touches the rim. Moved easily before. Stopped fully when touched.
Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine
StevenStanleyBayes wrote:robot797 wrote:then the cylinder it tapered
Again : the piston is stopped by the rim and touches the rim. Moved easily before. Stopped fully when touched.
The same was the case when brand new.
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