Knock, knock, knock sound

I have seen people put 50 or 60 year old used fiber gears in a engine because the gear looked good. Most of these old used gears only lasted for 100 to 300 miles before the teeth broke off. My theory is that when the gear soaks in oil for 50 or 60 years it gets soft and the teeth break off when you try to run it.
 
My 31 also had a timing gear that looked like that when I bought the car. It had 1957 plates on the car, and I don't know if the car was parked for that reason, or If the engine had a stuck valve that tore the teeth off when I tried to start it. Anyway I installed a new gear, and the engine runs like a Swiss watch.

Your gear has the aluminum center, so it needs to be changed anyway before the center works loose.

I see signs of rust inside your engine, so be sure to polish it all off the crank gear before installing a new cam gear.
 
Big hammer said:
What may have caused the teeth to break off, some people used a rag between the gears to torqe the cam nut!
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Dave had a NEW respect for his WIFE, after she held the engine with the CRANK, while he tightened the CAM nut to 105 Ft. Lbs:eek: (DON'T CROSS THAT WOMAN!!!)
Bill W.
 
ford-m said:
Well, I removed inspection cover for the timing gear and she still looks good for an original gear. Not loose at all. So then I used a bar to see if the crank moved back and forth and yup she does. About 1/8 of an inch. Video below.

https://vimeo.com/222254828

I guess Tomorrow the pan comes off as Im fearing the worst.
As for rebuild. I was the one who basically took it all apart, cleaned everything and but her back together years ago in 2003.

If it's time to do the ol girl right, it's time is now. Anyone want to come help?

Michael
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Ha! When I got my A home after it had sat in a carport since 1980 the first thing I did was drain the oil and the cam gear teeth.:eek: Yeah all the teeth were broke of the cam gear and it was still in time with the crank gear. While rebuilding it got an aluminum gear.
 
Seeing as you're going to be replacing the cam gear, unless the crankshaft gear is pristine I would suggest that you replace it at the same time. It's always best to replace gears as a set.
 
katy said:
Seeing as you're going to be replacing the cam gear, unless the crankshaft gear is pristine I would suggest that you replace it at the same time. It's always best to replace gears as a set.
Click to expand...

I would likely do the same thing if the crank was out of the engine, but since the gear is so hard to remove, I sanded the rust on my crank gear. I used a rag under the gear to catch any rust or grit.
The cam gear had a crack in one tooth, so it needed to be replaced.

You can also see all the wear on the aluminum sleeve of the two piece pulley. I replaced it with an original one piece pulley I had.
 

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Ford-M, did you get your rig fixed? Have you eliminated the knock with a new timing gear? Just wondering in that I am in the process of thinking I have the same problem but have not torn anything apart yet.
 
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