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Valve Grinding Question
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Valve Grinding Question
Can the valves be ground form up top with the head removed with out having to take the valves out of the engine?
Just curious I was wondering if I were to grind them in place could I get a better seat?
Thanks
Just curious I was wondering if I were to grind them in place could I get a better seat?
Thanks
3969 Members
1954 Cub quick hitch /Plow
1947 Ford 2N
1948 Green Machine Model M (i know)
Knowledge Is Power
and Power is Knowledge
"The bitterness of poor quality remains long after the sweetness of the low price is forgotten."
1954 Cub quick hitch /Plow
1947 Ford 2N
1948 Green Machine Model M (i know)
Knowledge Is Power
and Power is Knowledge
"The bitterness of poor quality remains long after the sweetness of the low price is forgotten."
- Bigdog
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Unless you see ridges or pitting, I'd just lap the valves and go ahead with assembly.
Bigdog
If you can't fix it with a hammer, you've got an electrical problem.
My wife says I don't listen to her. - - - - - - - - Or something like that!
http://www.cubtug.com
If you can't fix it with a hammer, you've got an electrical problem.
My wife says I don't listen to her. - - - - - - - - Or something like that!
http://www.cubtug.com
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BD
Thats what I ment should I have lapped them before closing her up?
also can I open it back up and use the same gasket or do I need A new one I copper coated the one on there now
Thanks
Thats what I ment should I have lapped them before closing her up?
also can I open it back up and use the same gasket or do I need A new one I copper coated the one on there now
Thanks
3969 Members
1954 Cub quick hitch /Plow
1947 Ford 2N
1948 Green Machine Model M (i know)
Knowledge Is Power
and Power is Knowledge
"The bitterness of poor quality remains long after the sweetness of the low price is forgotten."
1954 Cub quick hitch /Plow
1947 Ford 2N
1948 Green Machine Model M (i know)
Knowledge Is Power
and Power is Knowledge
"The bitterness of poor quality remains long after the sweetness of the low price is forgotten."
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- 10+ Years
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Since you have the head back on. Do a dry compression test then a wet compression test before you remove the head again. You may luck out.
If there is no significant difference between the two tests and all cylinders are close in PSI and the PSI readings in the 100 to 110 range - I wouldn't lap the valves. My guess is that you will need to lap the valves. Another head gasket.
Not sure what you mean by removing the valves from the engine. You will need to remove the valve springs, caps and keepers on each valve to accomplish the lapping. That is to say you will need to remove the valves. Lapping valves can be accomplished with the engine still in the tractor.
Eugene
If there is no significant difference between the two tests and all cylinders are close in PSI and the PSI readings in the 100 to 110 range - I wouldn't lap the valves. My guess is that you will need to lap the valves. Another head gasket.
Not sure what you mean by removing the valves from the engine. You will need to remove the valve springs, caps and keepers on each valve to accomplish the lapping. That is to say you will need to remove the valves. Lapping valves can be accomplished with the engine still in the tractor.
Eugene
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Gene
Can you tell me the right way to do a compression test and how do I do a wet test pour a little gas into each cylinder?
And I want the wet test results correct?
Thanks
Can you tell me the right way to do a compression test and how do I do a wet test pour a little gas into each cylinder?
And I want the wet test results correct?
Thanks
3969 Members
1954 Cub quick hitch /Plow
1947 Ford 2N
1948 Green Machine Model M (i know)
Knowledge Is Power
and Power is Knowledge
"The bitterness of poor quality remains long after the sweetness of the low price is forgotten."
1954 Cub quick hitch /Plow
1947 Ford 2N
1948 Green Machine Model M (i know)
Knowledge Is Power
and Power is Knowledge
"The bitterness of poor quality remains long after the sweetness of the low price is forgotten."
- Bigdog
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Tony - use oil for the wet test, not gas. First do the test dry, then re-run it wet. If there is a low reading on a cylinder and it improves significantly with the wet test, the rings are likely worn, if the low reading does not change or change very much, it is due to poor valve seating.
Bigdog
If you can't fix it with a hammer, you've got an electrical problem.
My wife says I don't listen to her. - - - - - - - - Or something like that!
http://www.cubtug.com
If you can't fix it with a hammer, you've got an electrical problem.
My wife says I don't listen to her. - - - - - - - - Or something like that!
http://www.cubtug.com
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OK
So can you tell me the right way to do the compression test
Should I remove all the plugs and crank the engine over and take cylinder pressures one at a time?
Or leave the other spark plugs in and only remove the one from the cylinder being tested?
So can you tell me the right way to do the compression test
Should I remove all the plugs and crank the engine over and take cylinder pressures one at a time?
Or leave the other spark plugs in and only remove the one from the cylinder being tested?
3969 Members
1954 Cub quick hitch /Plow
1947 Ford 2N
1948 Green Machine Model M (i know)
Knowledge Is Power
and Power is Knowledge
"The bitterness of poor quality remains long after the sweetness of the low price is forgotten."
1954 Cub quick hitch /Plow
1947 Ford 2N
1948 Green Machine Model M (i know)
Knowledge Is Power
and Power is Knowledge
"The bitterness of poor quality remains long after the sweetness of the low price is forgotten."
- Bigdog
- Team Cub Mentor
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plugs out, use the starter to crank the engine about 6 - 7 revs.
Bigdog
If you can't fix it with a hammer, you've got an electrical problem.
My wife says I don't listen to her. - - - - - - - - Or something like that!
http://www.cubtug.com
If you can't fix it with a hammer, you've got an electrical problem.
My wife says I don't listen to her. - - - - - - - - Or something like that!
http://www.cubtug.com
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Got It
Thanks
You know I will rip it apart again a do this
Its the nature of my beast
Thanks
You know I will rip it apart again a do this
Its the nature of my beast
3969 Members
1954 Cub quick hitch /Plow
1947 Ford 2N
1948 Green Machine Model M (i know)
Knowledge Is Power
and Power is Knowledge
"The bitterness of poor quality remains long after the sweetness of the low price is forgotten."
1954 Cub quick hitch /Plow
1947 Ford 2N
1948 Green Machine Model M (i know)
Knowledge Is Power
and Power is Knowledge
"The bitterness of poor quality remains long after the sweetness of the low price is forgotten."
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- 10+ Years
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- Location: 90210
No
I had the head off because it had a crack it it
The tractor ran good little smoke but I thought I clear that up.
The cylinders looked great no scaring at all
the valves looked oK too
But when I buttoned down the head
I did dry compression test
Got 100 103 82 101 about
The # 3 was lil low I think it might be the valves on that cylinder I will open it up and see
Is there any trick to getting the holding clips off of the valves when I do this?
I had the head off because it had a crack it it
The tractor ran good little smoke but I thought I clear that up.
The cylinders looked great no scaring at all
the valves looked oK too
But when I buttoned down the head
I did dry compression test
Got 100 103 82 101 about
The # 3 was lil low I think it might be the valves on that cylinder I will open it up and see
Is there any trick to getting the holding clips off of the valves when I do this?
3969 Members
1954 Cub quick hitch /Plow
1947 Ford 2N
1948 Green Machine Model M (i know)
Knowledge Is Power
and Power is Knowledge
"The bitterness of poor quality remains long after the sweetness of the low price is forgotten."
1954 Cub quick hitch /Plow
1947 Ford 2N
1948 Green Machine Model M (i know)
Knowledge Is Power
and Power is Knowledge
"The bitterness of poor quality remains long after the sweetness of the low price is forgotten."
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Look in
rudies site you will find it and many interesting things and how to do them. I don't remember exactly where it is in here.
http://www.cleancomputes.com/Cub/index.html
Bill
rudies site you will find it and many interesting things and how to do them. I don't remember exactly where it is in here.
http://www.cleancomputes.com/Cub/index.html
Bill
Bill
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"Life's tough.It's even tougher if you're stupid."
- John Wayne
" We hang petty thieves and appoint the great ones to public office."
- Aesop
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Do the dry and wet compression tests again. This will tell you if the low compression cylinder has a ring problem or a valve problem.
You need a valve spring compressor to remove the retainers. Once you get the spring compressed - rap on the side of the spring cap to release the retainers.
Compression on 3 cylinders is good. The fourth is a bit weak but not terrible.
If this were my tractor and I would just use it as is for a while to see what happens. Put a little Seafoam in the fuel to loosen up the rings.
Eugene
You need a valve spring compressor to remove the retainers. Once you get the spring compressed - rap on the side of the spring cap to release the retainers.
Compression on 3 cylinders is good. The fourth is a bit weak but not terrible.
If this were my tractor and I would just use it as is for a while to see what happens. Put a little Seafoam in the fuel to loosen up the rings.
Eugene
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