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amc 360 cam/dist.gear problem

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twister01 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote twister01 Quote  Post ReplyReply Direct Link To This Post Topic: amc 360 cam/dist.gear problem
    Posted: Mar/22/2008 at 2:37pm
   Need help!   I have a 360 bored 40 over ,edelbrock alum heads,msd pro billet dist, lunati cam with msd cam gear.  I just got the motor broke in with about450 miles on it and the teeth on the dist are all chewed off! the teeth on the cam gear are also chewed pretty bad . Does anybody have an answer to my problem ? Depth all looks good wear pattern on the gear are perfectly centered. Thanks for your help .
 
        thanks Dave
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poormansMACHINE View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote poormansMACHINE Quote  Post ReplyReply Direct Link To This Post Posted: Mar/22/2008 at 2:52pm
did you start with both new gears from the same maker?
Did you check the oil supply slot in the cam gear for any flashing obstruction?
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twister01 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote twister01 Quote  Post ReplyReply Direct Link To This Post Posted: Mar/22/2008 at 2:54pm

Both cam gear and dist were new and are MSD brand, oil pump slot is clear of any debree etc.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 73hornut Quote  Post ReplyReply Direct Link To This Post Posted: Mar/22/2008 at 3:59pm
The oil passages from the #1 cam gear through to the cam distributor gear, are probably blocked.
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poormansMACHINE View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote poormansMACHINE Quote  Post ReplyReply Direct Link To This Post Posted: Mar/23/2008 at 12:40am
How wet were the gears when you pulled it apart?
Did you have them coated with any assembly lube before firing?
How easy does your oil pump turn by hand?
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twister01 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote twister01 Quote  Post ReplyReply Direct Link To This Post Posted: Mar/23/2008 at 2:24am
I will check oil passages, I coated everything really good with assembly lube, all lifters,cam lower end of dist,all bearings,lower end etc. I will check oil pump to see how much force it takes to turn in by hand.
 
 
                Thank you for your help and replies, Dave
 
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scott View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote scott Quote  Post ReplyReply Direct Link To This Post Posted: Mar/23/2008 at 2:28am

Click here:  http://amccars.net/cgi/yabb2/YaBB.pl?num=1180919787/0#0

You're not the only one that's had this problem.   
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twister01 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote twister01 Quote  Post ReplyReply Direct Link To This Post Posted: Mar/23/2008 at 3:05am
 Thanks for the link looks like there is alot of  people with same broblems!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: Mar/23/2008 at 8:51am
There should not be, and there's always a logical answer.
Some new covers a while back had an alignment issue.
In some cases, the oil pump takes too much force - ie too much pressure, - and that coupled with the fact that it for a fraction of a split second nearly hydro-locks, hammers on those gears. Contact bulltear for a solution there.
Certain cam gears causes an issue blocking oil flow to the gears.
I prime by hand, using a speed-handle and a home-made bit that goes to the oil pump. I can FEEL what's going on besides watching. The bit I use should be soaked with oil, I should be able to turn the handle and see oil coming through to the gear down there.
Dist shaft runout or alignment can be an issue (see comment on faulty covers above)
If all things are right, there should be no issue at all.
I always prefer to stick with the gears I took out of the engine when I do a rebuild and do everything possible to use them again, and also check for how well/easy it is to get the distributor back in, and how the pump turns when priming.
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twister01 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote twister01 Quote  Post ReplyReply Direct Link To This Post Posted: Mar/23/2008 at 12:33pm
I install assembly lube and then prime my moters by hand w/ 1/2" drill motor also before start up. new gears on the way then re-install.I will try looking into relief on housing Thanks forall your help. Dave
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