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Brazing cam gear oil grooves |
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PHAT69AMX 
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Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5926 |
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 Topic: Brazing cam gear oil groovesPosted: Sep/30/2021 at 6:20pm |
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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...
Edited by PHAT69AMX - Sep/30/2021 at 6:22pm |
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Ramzilla
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Joined: Jan/28/2019 Location: arizona Status: Offline Points: 354 |
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Posted: Sep/30/2021 at 4:01pm |
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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
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SC Rambler
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Ramzilla
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Posted: Sep/30/2021 at 3:52pm |
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SC Rambler
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WesternRed
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Posted: Sep/29/2021 at 5:55pm |
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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.
Edited by WesternRed - Sep/29/2021 at 5:57pm |
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I've finally given up drinking for good...........now I only drink for evil.
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RobinPDX
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Joined: Dec/07/2020 Location: Oregon Status: Offline Points: 191 |
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Posted: Sep/29/2021 at 4:05pm |
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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. |
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Rob Wiley
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turdferguson
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Joined: Sep/28/2021 Location: Lombard, IL Status: Offline Points: 90 |
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Posted: Sep/29/2021 at 3:38pm |
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Thank You, that is some great information, wish I had it 15 years ago!
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madams
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Posted: Sep/29/2021 at 1:04pm |
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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
Edited by madams - Sep/29/2021 at 1:08pm |
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turdferguson
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Posted: Sep/29/2021 at 9:54am |
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I read in another thread that the stock gear has no oiling grooves, can anyone confirm this?
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jcisworthy
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Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Posted: Jan/21/2021 at 1:07am |
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Not necessary waste of time in my opinion.
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Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
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RobinPDX
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Posted: Jan/20/2021 at 11:00pm |
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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!
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Rob Wiley
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