Your donations help keep this valuable resource free and growing. Thank you.
|
dist gear shim |
Post Reply | Page <123> |
Author | |
Hurst390
AMC Addicted Joined: Apr/20/2008 Location: secret Status: Offline Points: 5822 |
Post Options
Thanks(0)
|
Loose end play always here
|
|
SC/Hurst Rambler
11.62 120 100% Street Legal |
|
billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
Post Options
Thanks(0)
|
I remove some of the end-play and have never had an issue, however, there are other variables at play here - would they have been eaten anyway? It is possible it wasn't your shimming out some of the end play that did it? Less end play, as long as you don't take out so much thermal changes cause a bind, should cause no issues - unless of course you shift worn areas into unworn areas and so on...... perhaps the gears would have gone south anyway.
Are you SURE it was the removal of some of the end play that did it? |
|
Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4210 |
Post Options
Thanks(0)
|
How much play do you have?
You need a bit to allow in oil. |
|
Gremlin Dreams
|
|
Bill F
AMC Apprentice Joined: Feb/21/2017 Location: Maryland Status: Offline Points: 244 |
Post Options
Thanks(0)
|
Remember they are bevel gears designed to run at angles to each other. The forces when running should set the gear where it needs to be. I'd be careful changing the shims.
|
|
billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
Post Options
Thanks(0)
|
But since all that is happening is removing some of the play, there's no reason it should "eat gears".
If the range was up .010 and down .010 and all you do is narrow that, you aren't introducing any new part of the gear to the other gear. Now if you made the play LARGER it could move into unworn areas but removing play unless you made it tight as things heated up there's no reason. No angle is changing - it's moving up and down within a range as it is, you are simply narrowing that range. My bet - unless there was no play left when it got hot,, it wasn't the act of removing excess play - it was something that was going to happen anyway, but was being blamed on taking out some of the play.
The gears were already touching in that range, the range just got a bit smaller. |
|
jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
Post Options
Thanks(0)
|
I shoot for .010 end play
|
|
Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
|
billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
Post Options
Thanks(0)
|
That's about where I go with 'em. Never a problem.
I use regular machine shims. |
|
Rebel327
AMC Nut Joined: Jan/26/2014 Location: Toledo Ohio Status: Offline Points: 358 |
Post Options
Thanks(0)
|
TSM has spec.
|
|
Lyle
AMC Addicted Joined: Jul/17/2014 Location: None Status: Offline Points: 772 |
Post Options
Thanks(0)
|
The distributor gear will get "eaten up" if you shim the distributor shaft down so when hot there is no clearance with the oil pump shaft. The distributor gear is the weak link.
There is suppose to be at least 0.010" between the top of the oil pump shaft and the distributor shaft were they will interfere, not the engagement, to allow for thermal expansion. If the distributor end play is too large the timing will "float" excessively. Picture the shaft riding up or down a slope and how the rotor will move - it has to rotate as it moves up or down.
|
|
xspiriment
AMC Nut Joined: Apr/27/2009 Location: New Mexico Status: Offline Points: 379 |
Post Options
Thanks(0)
|
Thanks for all of your inputs. There is a end play spec of.010 minimum. i'm going to set it for about .015 that should be good. I had an excess of .030 with a very worn shim so that's why I shimming it a little tighter. Thanks again.
|
|
Post Reply | Page <123> |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |