Print Page | Close Window

Brazing cam gear oil grooves

Printed From: TheAMCForum.com
Category: The Garage
Forum Name: AMC V8 Engine Repair and Modifications
Forum Description: AMC-made V8 engine mechanical, ignition and fuel from basic repair to high-perf modifications
URL: https://theamcforum.com/forum/forum_posts.asp?TID=109070
Printed Date: Mar/28/2024 at 3:25pm
Software Version: Web Wiz Forums 12.03 - http://www.webwizforums.com


Topic: Brazing cam gear oil grooves
Posted By: BU1
Subject: Brazing cam gear oil grooves
Date 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
#1 1968 AMX Rally Green 343 Z code 4spd since 1975 #02642
#2 1968 AMX Rally Green 290 N code 4spd since 2019 #02959



Replies:
Posted By: RobinPDX
Date 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.



-------------
Rob Wiley


Posted By: SC397
Date 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.
https://flic.kr/p/XRB48H" rel="nofollow"> https://flic.kr/p/XRB48H" rel="nofollow - GearRework by https://www.flickr.com/photos/149168736@N07/" rel="nofollow - Rick Jones , on Flickr


Posted By: BU1
Date Posted: Jan/20/2021 at 9:49pm
 Thank you!!!  Smile

-------------
AMO #2726
#1 1968 AMX Rally Green 343 Z code 4spd since 1975 #02642
#2 1968 AMX Rally Green 290 N code 4spd since 2019 #02959


Posted By: RobinPDX
Date 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.
http://https://www.youtube.com/watch?v=6QELbRRnEJs" rel="nofollow - http://https://www.youtube.com/watch?v=6QELbRRnEJs


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


Posted By: jcisworthy
Date Posted: Jan/21/2021 at 1:07am
Not necessary waste of time in my opinion. 

-------------
Specializing in dyno services, engine building, and cylinder head porting

rbjracing.com
Phone Number 518-915-3203


Posted By: turdferguson
Date Posted: Sep/29/2021 at 9:54am
I read in another thread that the stock gear has no oiling grooves, can anyone confirm this?


Posted By: madams
Date Posted: Sep/29/2021 at 1:04pm
Stock gear does have a single oil "notch" that supplies the distributor drive gear on the cam.  Below is probably the most thorough discussion on distributor lubrication on the Forum

https://theamcforum.com/forum/oil-path-amc-distributor-gear-oiling_topic95506_page1.html" rel="nofollow - https://theamcforum.com/forum/oil-path-amc-distributor-gear-oiling_topic95506_page1.html


Posted By: turdferguson
Date Posted: Sep/29/2021 at 3:38pm
Thank You, that is some great information, wish I had it 15 years ago!


Posted By: RobinPDX
Date Posted: Sep/29/2021 at 4:05pm
This is a very good info source you were linked to.

The video that was deleted", was just a Boro-scope probe that displayed Adequate amounts of oil spilling on the Dist / TC gears, after this TC Gear Mod was performed, nothing really special.




-------------
Rob Wiley


Posted By: WesternRed
Date Posted: Sep/29/2021 at 5:55pm
I filled half the slots with JB Weld, can't really comment on durability until it comes apart again, but it has 200 1/4 mile passes on it now:



May or may not make a difference.

PS: the oil slot is on the opposite side to the keyway, so that one is blocked to force the oil to take a longer path out.


-------------
I've finally given up drinking for good...........now I only drink for evil.


Posted By: Ramzilla
Date Posted: Sep/30/2021 at 3:52pm


-------------
SC Rambler


Posted By: Ramzilla
Date Posted: Sep/30/2021 at 4:01pm
Here is picture on left 1969 390 factory timing set. It has six notches that are .007 depth.
On right is timing set from Crane Rollmaster two notches that are .053 depth.
Six times .007 .042
Two times .053 1.06
Any comments good or bad too much oil too little oil.
Larry


-------------
SC Rambler


Posted By: PHAT69AMX
Date Posted: Sep/30/2021 at 6:20pm
I ain't no body but I say too much...
The distributor drive gears have their own separate oil circuit & 4 holes in the gear's teeth roots that squirt oil.
Can't see where those slingers do much at all except coat the interior walls of the timing cover with oil.
Except to maybe fill the timing cover cavity with excessive volumes of oil as that cavity has a restricted drainback passage to the oil pan due it's close proximity to the front face of the #1 main crank bearing cap...
Thus why the modification to the bottom curved part of the timing cover to improve oil drainabck from the timing chain cavity back to the oil pan where it belongs and does the most good...
Especially at rpms since apparently AMC's oil pump is actually "too good" and pumps the oil pan dry because all the oil get's caught and ends up elsewhere up in the engine somewhere rather than back down in the oil pan where it belongs...


-------------


Link to a http://www.youtube.com/watch?v=MySiKQsmWxU" rel="nofollow - Short YouTube Burnout Video




Print Page | Close Window

Forum Software by Web Wiz Forums® version 12.03 - http://www.webwizforums.com
Copyright ©2001-2019 Web Wiz Ltd. - https://www.webwiz.net