The Ford Barn

FrankWest · 12-13-2014, 10:30 AM

The original was a composite material "the laminated plastic of it's day"
I have seen that there are many replacement material types...
Aluminum is the most common.
Brattons's states that their composite gear is much stronger than commonly available composites.
What do you seasoned Model A and Model B engine owners use to replace a broken timing gear?
This is my first replacement...My car started up after 20 years domant ran for several hours and then stopped... original timing gear..teeth sheared off.
I guess the original was not that bad to last 80 years!!!!
I am so confused as to what to replace it with.
Did Ford use a composite only to cut down on the noise, or were there other conserns???

Kurt in NJ · 12-13-2014, 11:03 AM

If the engine sat for 20 years there probably is a lot of sludge in the bottom of the pan ---many times I have been told when looking at a engine that sat that the oil was clean on the dipstick---this is because all the "dirt" settled out, many times enough to cover the oil pickup

most likely both cam and crank gears should be replaced, if just replacing the cam gear use the fibre one, other gears will work but the fibre one will get used to a worn gear and make less noise, I have the alum gear that was replaced with the crank gear-40 years of use--it runs so quiet I can hear the points opening--closing

FrankWest · 12-13-2014, 12:12 PM

Quote:

Originally Posted by Kurt in NJ

If the engine sat for 20 years there probably is a lot of sludge in the bottom of the pan ---many times I have been told when looking at a engine that sat that the oil was clean on the dipstick---this is because all the "dirt" settled out, many times enough to cover the oil pickup

most likely both cam and crank gears should be replaced, if just replacing the cam gear use the fibre one, other gears will work but the fibre one will get used to a worn gear and make less noise, I have the alum gear that was replaced with the crank gear-40 years of use--it runs so quiet I can hear the points opening--closing

I had already cleaned the pan out. It was not too bad. , just 1 inch of sand like silt on the bottom.
Thanks for your info. Greatly appreciate it.

Purdy Swoft · 12-13-2014, 01:35 PM

I always replace the cam timing gear with either aluminum or bronze. Aluminum is cheaper and either will last a lifetime. I have just replaced the cam gear if the crank shaft gear wasn't pitted. Its not likely that the crank gear will be pitted unless it has been exposed to water . An important consideration is how much work do you want to do or can do . If you replace the crank gear the engine will need to be lifted, you will need a gear puller . The radiator, crankshaft pulley and oil pan all must be removed. Replacing only the cam gear will be easier . Being as it is such a pain in the butt job , would you ever want to have to go through it again ??? I've never had a problem with timing gear noise, no matter which gear that I used. If there was any noise, it would probably be very faint. Either way the stripped teeth will be a thing to consider . It may only be a few teeth. You may want to remove the oil pan again if its a bunch of teeth. the oil pomp has a pretty good screen but you will need to decide if there are enough stripped off teeth in the oil pan to actually block the screen .

FrankWest · 12-13-2014, 02:54 PM

Quote:

Originally Posted by Purdy Swoft

I always replace the cam timing gear with either aluminum or bronze. Aluminum is cheaper and either will last a lifetime. I have just replaced the cam gear if the crank shaft gear wasn't pitted. Its not likely that the crank gear will be pitted unless it has been exposed to water . An important consideration is how much work do you want to do or can do . If you replace the crank gear the engine will need to be lifted, you will need a gear puller . The radiator, crankshaft pulley and oil pan all must be removed. Replacing only the cam gear will be easier . Being as it is such a pain in the butt job , would you ever want to have to go through it again ??? I've never had a problem with timing gear noise, no matter which gear that I used. If there was any noise, it would probably be very faint. Either way the stripped teeth will be a thing to consider . It may only be a few teeth. You may want to remove the oil pan again if its a bunch of teeth. the oil pomp has a pretty good screen but you will need to decide if there are enough stripped off teeth in the oil pan to actually block the screen .

The oil pan gasket under the timing cover torn off when removing the cover so I will have to replace the gasket?

CarlG · 12-13-2014, 03:40 PM

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Quote:

Originally Posted by FrankWest

The oil pan gasket under the timing cover torn off when removing the cover so I will have to replace the gasket?

yes

12-13-2014, 10:30 AM	#1
FrankWest Senior Member Join Date: Sep 2013 Posts: 3,157	model B engine timing gear The original was a composite material "the laminated plastic of it's day" I have seen that there are many replacement material types... Aluminum is the most common. Brattons's states that their composite gear is much stronger than commonly available composites. What do you seasoned Model A and Model B engine owners use to replace a broken timing gear? This is my first replacement...My car started up after 20 years domant ran for several hours and then stopped... original timing gear..teeth sheared off. I guess the original was not that bad to last 80 years!!!! I am so confused as to what to replace it with. Did Ford use a composite only to cut down on the noise, or were there other conserns???

12-13-2014, 11:03 AM	#2
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,554	Re: model B engine timing gear If the engine sat for 20 years there probably is a lot of sludge in the bottom of the pan ---many times I have been told when looking at a engine that sat that the oil was clean on the dipstick---this is because all the "dirt" settled out, many times enough to cover the oil pickup most likely both cam and crank gears should be replaced, if just replacing the cam gear use the fibre one, other gears will work but the fibre one will get used to a worn gear and make less noise, I have the alum gear that was replaced with the crank gear-40 years of use--it runs so quiet I can hear the points opening--closing

12-13-2014, 01:35 PM	#4
Purdy Swoft Senior Member Join Date: May 2010 Location: Alabama Posts: 8,099	Re: model B engine timing gear I always replace the cam timing gear with either aluminum or bronze. Aluminum is cheaper and either will last a lifetime. I have just replaced the cam gear if the crank shaft gear wasn't pitted. Its not likely that the crank gear will be pitted unless it has been exposed to water . An important consideration is how much work do you want to do or can do . If you replace the crank gear the engine will need to be lifted, you will need a gear puller . The radiator, crankshaft pulley and oil pan all must be removed. Replacing only the cam gear will be easier . Being as it is such a pain in the butt job , would you ever want to have to go through it again ??? I've never had a problem with timing gear noise, no matter which gear that I used. If there was any noise, it would probably be very faint. Either way the stripped teeth will be a thing to consider . It may only be a few teeth. You may want to remove the oil pan again if its a bunch of teeth. the oil pomp has a pretty good screen but you will need to decide if there are enough stripped off teeth in the oil pan to actually block the screen .