Another good way is to weld a spacer to the bottom of a spark plug , so that it hits the piston at about 20 degrees before top dead centre when you rotate the engine . Mark this piont then rotate the engine the other way till it hits again . Mark this piont too , and tdc will be exactly in the middle of the two marks . Very acurate ( just be carefull that your spacer doesnt hit the valves as they open )
Perhaps a little gauge on the end of the tube as well. When the needle drops from its highest point, mark that point and whammo, TDC. Great initial idea though! I will use it tomorrow!
lol...this is a good way...but you dont need to put oil in the cylinder....just make a W in the hose with oil in the hose and measure it that way...it the same exact thing but there is no smoke and oil to clean or get rid of...but this still works i suppose haha
I made the same drilled out spark plug to find TDC on my Datsun Roadster. Instead of pumping oil into the cylinder, I had a small baby-food jar of oil, and a clear tube from the plug to the jar. As the piston goes up on the compression stroke, it blows bubbles in the jar of oil. Once TDC is reached, bubbles stop, and after TDC, the oil will begin to be drawn into the tube. No Smoke
Thanks John, I have a 1970 MG Midget that seems to have lost its markings on the bottom of the crankshaft pulley. So, it looks like I will need to use your idea!
I'll do that device some day.... liked it!
jonathan99786 1 month ago
could you explain more about drilling out the spark plug? I want to know how to do it and thanks for the video!
inspector1963 7 months ago
could you explain more about drilling out the spark plug?
inspector1963 7 months ago
you are a real THINKER man,,,keep up that habit .THANK YOU. God bless
MsTRINITAS 9 months ago
the more accurate way is use dial incator and a degree wheel is 100%
12344richard 9 months ago
what do you do once the oil in in the cylinder? Is it bad for the engine? how do you get it out?
genamour 10 months ago
Another good way is to weld a spacer to the bottom of a spark plug , so that it hits the piston at about 20 degrees before top dead centre when you rotate the engine . Mark this piont then rotate the engine the other way till it hits again . Mark this piont too , and tdc will be exactly in the middle of the two marks . Very acurate ( just be carefull that your spacer doesnt hit the valves as they open )
lumpy3553 1 year ago
What about putting GAS in there?
sprintR 1 year ago
Great idea! Nice and simple.
radum4 1 year ago
EXCELLENTO!!!
2874697 2 years ago
god dame that is a great idea..........
jh3835 2 years ago
Perhaps a little gauge on the end of the tube as well. When the needle drops from its highest point, mark that point and whammo, TDC. Great initial idea though! I will use it tomorrow!
Thanks!
papacatastrophe 2 years ago
lol...this is a good way...but you dont need to put oil in the cylinder....just make a W in the hose with oil in the hose and measure it that way...it the same exact thing but there is no smoke and oil to clean or get rid of...but this still works i suppose haha
drivesr20det 3 years ago 5
thank you very much for takein the time to do this
untokeson 3 years ago
thank you so much john keep going i learn a lot from you
rgag27 3 years ago
very interesting, thanks for the video
mille666 3 years ago
Thanks for another great video John, also a great adaptation of the idea capmcconnundrum,mabey a little greener too,ie;no smoke or waste oil.
mvanherd 3 years ago
I made the same drilled out spark plug to find TDC on my Datsun Roadster. Instead of pumping oil into the cylinder, I had a small baby-food jar of oil, and a clear tube from the plug to the jar. As the piston goes up on the compression stroke, it blows bubbles in the jar of oil. Once TDC is reached, bubbles stop, and after TDC, the oil will begin to be drawn into the tube. No Smoke
capmconnundrum 3 years ago 13
you clever ***t
brentforddave 1 year ago
Thanks John, I have a 1970 MG Midget that seems to have lost its markings on the bottom of the crankshaft pulley. So, it looks like I will need to use your idea!
erichpeterson 3 years ago