Re: oil pump drive gear bb
[Re: calrobb2000]
#3049769
06/11/22 08:17 PM
06/11/22 08:17 PM
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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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I've ran several Mildon and Mopar brand bronze gears oil pump drives with no issue, my pump gas duster had over 3000 street miles and hundreds of both 1/4 mile and 1/8-mile passes shifting at or above 7000 RPM I do set the end play,.004 to .012, (less end play is better ) on all the motors I build and use roller cams in
Last edited by Cab_Burge; 06/12/22 02:59 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: oil pump drive gear bb
[Re: AndyF]
#3049853
06/12/22 09:58 AM
06/12/22 09:58 AM
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Joined: Jan 2003
Posts: 10,668 North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,668
North Dakota
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Disclaimer: I have no personal knowledge on this. But the situation always seems to arise with roller cams. And the failures seem to be hit or miss, some live, some don't. I'm with AndyF, it has to have something to do with the block machining, I think it is the lifter bores. If they are perpendicular to the cam centerline, the cam can move forward at will changing the contact pattern between the two gears resulting in accelerated wear. If the bores are not perpendicular, then the cam would tend to be thrust one way or the other. If it's to the rear, life is good, if it's to the front, that won't end well. I've never put a roller cam in anything but when I do, I'm convinced the secret is controlling the cam end play.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: oil pump drive gear bb
[Re: calrobb2000]
#3049954
06/12/22 02:53 PM
06/12/22 02:53 PM
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Joined: Jan 2003
Posts: 25,618 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,618
Rio Linda, CA
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The amount of power needed to drive the oil pump plays into wear. HV/HP pumps put more strain on the drive gear.
The INTERNET, the MISinformation superhighway
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Re: oil pump drive gear bb
[Re: John_Kunkel]
#3050017
06/12/22 07:57 PM
06/12/22 07:57 PM
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Joined: Jan 2003
Posts: 1,979 s. e. pa.
calrobb2000
OP
top fuel
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OP
top fuel
Joined: Jan 2003
Posts: 1,979
s. e. pa.
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hi
not sure if it is a hv pump but psi is app 60-65 range .
the gear teeth dont seam to be the main prob , it is the gear face and the bushing that have the most ware .
something causing the shaft to press down on bushing face causing the 2 to chew each other up then gear drops allowing tooth ware ?
Last edited by calrobb2000; 06/12/22 08:09 PM.
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Re: oil pump drive gear bb
[Re: Cab_Burge]
#3050206
06/13/22 01:34 PM
06/13/22 01:34 PM
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Joined: Sep 2003
Posts: 19,243 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,243
north of coder
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like materials running against each other will chew each other up. example : the bronze gear running against the bronze bushing in the block. install a steel shim washer [.010 thick ?] under the distributor gear will fix that issue, but as Cab said, check your end play.
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