Re: Signs of excessive or abnormal bronze gear wear?
[Re: BradH]
#2639661
04/01/19 12:59 PM
04/01/19 12:59 PM
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Joined: Dec 2005
Posts: 11,706 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,706
Fulton County, PA
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A good idea is to make note of the slack (movement) between the drive gear and the cam when new. Then it's easy to detect wear if the thing is getting sloppy, by popping the distributor and checking with a large screwdriver or tool.
Or visually compare used to a new one.
Last edited by CMcAllister; 04/01/19 12:59 PM.
If the results don't match the theory, change the theory.
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Re: Signs of excessive or abnormal bronze gear wear?
[Re: BradH]
#2639680
04/01/19 01:23 PM
04/01/19 01:23 PM
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Joined: Jan 2003
Posts: 17,912 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,912
S.E. Michigan
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Sure!
Well, we can try.
Post away.
Rich H.
Esse Quam Videri
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Re: Signs of excessive or abnormal bronze gear wear?
[Re: BradH]
#2639792
04/01/19 06:28 PM
04/01/19 06:28 PM
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Joined: Jan 2003
Posts: 8,035 Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,035
Tulsa OK
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I always compare the gear wear to the inside most area of the teeth. I noticed some weird gear wear on my small block on this last inspection and when I put it in the block to check how much slop it had it turns out the bushing in the block was shot. It hadn't been in very long but it was very worn so I changed it and put another gear I had in. I have always just dropped the gear in and never checked that bushing, I am glad I noticed it before it chewed up another gear.
68 Barracuda Formula S 340
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Re: Signs of excessive or abnormal bronze gear wear?
[Re: Bad340fish]
#2639822
04/01/19 07:26 PM
04/01/19 07:26 PM
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Joined: Feb 2011
Posts: 1,454 Glendora Ca.
Just-a-dart
pro stock
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pro stock
Joined: Feb 2011
Posts: 1,454
Glendora Ca.
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Brad your oil filter will tell you a lot about what is happening to that brass gear.
"Just a Bracket car dressed up like a streetcar"
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Re: Signs of excessive or abnormal bronze gear wear?
[Re: Bad340fish]
#2639826
04/01/19 07:31 PM
04/01/19 07:31 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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I always compare the gear wear to the inside most area of the teeth. I noticed some weird gear wear on my small block on this last inspection and when I put it in the block to check how much slop it had it turns out the bushing in the block was shot. It hadn't been in very long but it was very worn so I changed it and put another gear I had in. I have always just dropped the gear in and never checked that bushing, I am glad I noticed it before it chewed up another gear. bushings can be a big issue. I've got a bunch of new ones that are too loose to use.
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Re: Signs of excessive or abnormal bronze gear wear?
[Re: lewtot184]
#2639828
04/01/19 07:36 PM
04/01/19 07:36 PM
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Joined: Dec 2013
Posts: 4,704 Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,704
Wichita
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Silly question: Why are you using a bronze gear in a street car instead of the melonized gear?
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: Signs of excessive or abnormal bronze gear wear?
[Re: BradH]
#2639972
04/01/19 11:12 PM
04/01/19 11:12 PM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
master
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master
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
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I had a camshaft that would mow right through the gears I actually ended up taking some sandpaper and rounding the edges of the gear on the cam.. man night and day difference
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: Signs of excessive or abnormal bronze gear wear?
[Re: WHITEDART]
#2639991
04/01/19 11:59 PM
04/01/19 11:59 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
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OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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In no particular order...
I have an oil filter cutting tool, but need to locate it after things got stuffed "wherever" when we had to deal with a basement plumbing leak last year.
I feel no detectable looseness between the bronze gear and the cam gear. I do think that I can push the oil pump drive shaft forward & backward maybe. 015" +/- due to bushing wear.
Dwayne Porter and I spoke about the melonized gear option a couple years ago when I was collecting parts. I run a high-volume oil pump, and the open spring loads with the new roller cam are about 600#s. If something about my combination does result in excessive wear on the treated steel gear, that's going to put more dangerous sh!t in my engine than the softer bronze gear, so I took his advice and decided to play it safe at this time.
We also talked about the possibility of sharp edges on the cam gear causing wear, which is why I used a small wire brush with a Dremel on the cam gear before installation. Not sure if it would have been better to use a small grinding stone and bevel the edges of the teeth, though.
I took a number of pictures tonight. However, the image sizes may be too large to upload directly from my phone. If they're too big, I'll have to shrink 'em some on my laptop and attach them tomorrow.
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Re: Signs of excessive or abnormal bronze gear wear?
[Re: BradH]
#2639994
04/02/19 12:06 AM
04/02/19 12:06 AM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
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OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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View of gear & cam before removing oil pump drive.
Last edited by BradH; 04/02/19 12:35 AM.
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Re: Signs of excessive or abnormal bronze gear wear?
[Re: BradH]
#2639995
04/02/19 12:09 AM
04/02/19 12:09 AM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
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OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Contact pattern on bronze gear visible...
Last edited by BradH; 04/02/19 12:29 AM.
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