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Brazing cam gear oil grooves

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BU1 View Drop Down
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    Posted: Jan/20/2021 at 11:15am
 Have read much here and at other places on the interweb about this. Have heard  ideas of welding all of them, and some leave maybe 1 slot open.
 
 If brazing, should the whole gear be preheated first to alleviate any cracking from the torch work?
 
 I didn't come across any real proof of a JB or epoxy type product with a track record of working for this. Can anyone share experience with this option??  Thanks to all.
AMO #2726
1968 AMX Rally Green 343 4spd since 1975
1968 AMX Rally Green 290 4spd since 2019
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RobinPDX Quote  Post ReplyReply Direct Link To This Post Posted: Jan/20/2021 at 7:37pm
Oh ya, heat it up uniformly to prevent deformation stress on welds.
As far as recreating new bypass slots, I would make two, 180 degree opposite , after all brazed up. About the size width  of a hacksaw blade to allow oiling on the surfaces.

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SC397 View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote SC397 Quote  Post ReplyReply Direct Link To This Post Posted: Jan/20/2021 at 9:24pm
I put them in my toaster oven at max for 45 min then braze all but the slot at the key way shut.
Then I grind them smooth.
GearRework by Rick Jones, on Flickr


Edited by SC397 - Jan/20/2021 at 9:28pm
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BU1 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BU1 Quote  Post ReplyReply Direct Link To This Post Posted: Jan/20/2021 at 9:49pm
 Thank you!!!  Smile
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RobinPDX Quote  Post ReplyReply Direct Link To This Post Posted: Jan/20/2021 at 11:00pm
There is a YT video of someone whom took the TC cover, cut it open to expose the oils extrusion as when like running, then ran the pump with a drill. No idea what the TC Gear backside was like though. 
One Idea Is to get one of those Boroscope devices for about 50 bucks.


Put the  TC in and do the Mod like you did.
 Prime pump with drill and view what actually occurs in oil flow with scope, once assembly is put together.
For ever ppl just trusted it was correct and did OK actually. 
What this Very topic needs is somebody to do just that As I suggested and put a lot of questioning on it to bed!
Rob Wiley
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jcisworthy Quote  Post ReplyReply Direct Link To This Post Posted: Jan/21/2021 at 1:07am
Not necessary waste of time in my opinion. 
Specializing in engine building and cylinder head porting

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