Nice video! Reminds me of a joke about former gynecologist looking to become a mechanic, who took the engine apart and then built it together -- all through the muffler!
A good trick shown to me by a mentor that taught me the "rope trick" is to tie dental floss around the keeper groove on the valve. Push the valve in and fish the floss out of the upper spark plug hole with a piece of safety wire with a small hook bent on the end and pull it up by the floss to clean the stem. After cleaning the guide when the valve is back in the cylinder bore, fish the floss back through the guide and it usually pulls right back in.
Nice job I did that a few times in the 80s when my 150 was doing traffic reporting around Boston. They flew it 5 hrs a day slow flight so the 100 LL plugged up the valves and spark plugs regularly. I cut 2 fingers off a 4 finger pick up tool went threw the bottom plug hole.
Compressed air to hold valve in place. That's how I have replaced valve seals on automotive engines. Wondered why in aviation everyone seems to use the rope trick. Would it have been a good idea to lap the valve while you were at it?
What is the likley cause of a sticky valve. What do you recommend to prevent this from ocurring. Running as lean as possible? Additives? What would be the likely cause if it is a recurring problem?
Add four ounces of Marvel Mystery Oil to each ten gallons of gasoline in fuel tank. You will never stick a valve again. This has been a sure bet for almost a hundred years. ‘costs almost nothing.
Waste of time, the guide is worn and will get stuck again. This is only a good technique to get a airplane back home. Not at annual, needs to be removed and repaired properly
Worn guides are loose and affect the valve contacting the seat correctly. Sticking valves, is a very common problem running an engine on fuel with way more lead than it was designed to use. Years ago Lycoming issued a service letter to check the clearance and ream as necessary every 400 hours. I have been doing this for over 40 years and never had a issue after reaming a guide, in fact I have never had to ream the same cylinder again after years and many hours of operation.
@@macmccune21if it was lycoming I would definitely check all others. Continental seems to wear the guides more often than sticking. To be on the safe side it is definitely recommended to check them all.
Thanks for the diagnosis Doctor T. You better go back to school. Too bad my skin cancer is not contagious so I can't spread it to your chanel. Ops there is no content to spread to, I think I can guess why.
Another informative video based on many years of experience!
Nice video! Reminds me of a joke about former gynecologist looking to become a mechanic, who took the engine apart and then built it together -- all through the muffler!
A good trick shown to me by a mentor that taught me the "rope trick" is to tie dental floss around the keeper groove on the valve. Push the valve in and fish the floss out of the upper spark plug hole with a piece of safety wire with a small hook bent on the end and pull it up by the floss to clean the stem. After cleaning the guide when the valve is back in the cylinder bore, fish the floss back through the guide and it usually pulls right back in.
Blow air into the cylinder through either hole (spark plug or guide) to blow the floss out the other hole.
Wow thats a cool trick and a nice job
Nice job
I did that a few times in the 80s when my 150 was doing traffic reporting around Boston. They flew it 5 hrs a day slow flight so the 100 LL plugged up the valves and spark plugs regularly. I cut 2 fingers off a 4 finger pick up tool went threw the bottom plug hole.
very good
Neat trick. Very clever.
Very good
nice
Compressed air to hold valve in place. That's how I have replaced valve seals on automotive engines. Wondered why in aviation everyone seems to use the rope trick. Would it have been a good idea to lap the valve while you were at it?
Any reason this wouldn't work on the larger Continentals? Like the 520?
What is the likley cause of a sticky valve. What do you recommend to prevent this from ocurring. Running as lean as possible? Additives? What would be the likely cause if it is a recurring problem?
Did you use a specialty valve guide reamer from McFarlane?
I bough
Many years ago I purchased the size listed in the overhaul manual from an automotive machine shop supply. Now I would probably use McMaster Carr
Add four ounces of Marvel Mystery Oil to each ten gallons of gasoline in fuel tank. You will never stick a valve again. This has been a sure bet for almost a hundred years. ‘costs almost nothing.
Waste of time, the guide is worn and will get stuck again. This is only a good technique to get a airplane back home. Not at annual, needs to be removed and repaired properly
Worn guides are loose and affect the valve contacting the seat correctly. Sticking valves, is a very common problem running an engine on fuel with way more lead than it was designed to use. Years ago Lycoming issued a service letter to check the clearance and ream as necessary every 400 hours. I have been doing this for over 40 years and never had a issue after reaming a guide, in fact I have never had to ream the same cylinder again after years and many hours of operation.
@@KerryWhoin your experience, when a valve gets sticky like this what are the odds the other valves need reamed?
@@macmccune21if it was lycoming I would definitely check all others. Continental seems to wear the guides more often than sticking. To be on the safe side it is definitely recommended to check them all.
Do you shake your customers hand with your right hand covered in very infectious warts. Yuck such a turn off.
Thanks for the diagnosis Doctor T. You better go back to school. Too bad my skin cancer is not contagious so I can't spread it to your chanel. Ops there is no content to spread to, I think I can guess why.