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Bronze Gear Wear #2853028
11/29/20 05:02 PM
11/29/20 05:02 PM
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Michigan
MarkZ Offline OP
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Further diving into my motor today to fix a lifter issue and thought I should ask regarding the wear on this bronze gear. Car has a Comp hydraulic roller setup with about 3k street miles and a few 1/4 passes.

Is this amount of play acceptable? Thanks.


20201129_160527.jpg20201129_160511.jpg20201129_160425.jpg

1987 Fifth Avenue - 512/518/D60
Re: Bronze Gear Wear [Re: MarkZ] #2853034
11/29/20 05:12 PM
11/29/20 05:12 PM
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Romeo MI
MR_P_BODY Offline
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Its trash.. get a new one
wave

Re: Bronze Gear Wear [Re: MarkZ] #2853035
11/29/20 05:13 PM
11/29/20 05:13 PM
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Minn
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SportF Offline
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That would be the worst I've seen. The teeth must be on the verge of breaking.

Re: Bronze Gear Wear [Re: SportF] #2853041
11/29/20 05:31 PM
11/29/20 05:31 PM
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So. Burlington, Vt.
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fast68plymouth Offline
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Uuuhh...... yeh.
That’s toast.

In fact it was toast when it had 1/2 that much wear.

Might want to look into the melonized steel gear.

High volume or high pressure oil pump?


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Bronze Gear Wear [Re: fast68plymouth] #2853044
11/29/20 05:48 PM
11/29/20 05:48 PM
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Ontario, Canada
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Stanton Offline
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To the best of my knowledge a "hydraulic" roller cam does NOT use a bronze gear - PERIOD. ONLY solid roller "billet" cams require a bronze gear.

Re: Bronze Gear Wear [Re: Stanton] #2853054
11/29/20 05:56 PM
11/29/20 05:56 PM
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fast68plymouth Offline
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ALL roller cams for a BB Mopar are billet.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Bronze Gear Wear [Re: Stanton] #2853055
11/29/20 05:56 PM
11/29/20 05:56 PM
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Great Neck,LI,new york
hemi-itis Offline
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Originally Posted by Stanton
To the best of my knowledge a "hydraulic" roller cam does NOT use a bronze gear - PERIOD. ONLY solid roller "billet" cams require a bronze gear.


That is what I used to think........................ wink spank


Last edited by hemi-itis; 11/30/20 09:42 PM.

HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: Bronze Gear Wear [Re: hemi-itis] #2853058
11/29/20 06:00 PM
11/29/20 06:00 PM
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So. Burlington, Vt.
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fast68plymouth Offline
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Besides, the bronze gear is suitable to be used with any cam core material.
There just isn’t any upside to doing so on cast cores, since they don’t last as long, and they’re expensive....... so why would you?


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Bronze Gear Wear [Re: fast68plymouth] #2853067
11/29/20 06:18 PM
11/29/20 06:18 PM
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North Dakota
6PakBee Offline
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So what is the solution?


"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
Re: Bronze Gear Wear [Re: 6PakBee] #2853074
11/29/20 06:39 PM
11/29/20 06:39 PM
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Originally Posted by 6PakBee
So what is the solution?




Well high volume oil pumps cause wear, not setting your distributor thrust causes wear, not setting you cam thrust causes wear, tight cam bearings cause wear, and a few others. They were also some very low quality bronze gears on some of the drives.


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Livin and lovin life one day at a time




Re: Bronze Gear Wear [Re: 6PakBee] #2853076
11/29/20 06:42 PM
11/29/20 06:42 PM
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fast68plymouth Offline
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Originally Posted by 6PakBee
So what is the solution?


As I already mentioned....... the melonized steel gear.

You just have to have a combo where a std pressure/std volume oil pump will work for you.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Bronze Gear Wear [Re: MarkZ] #2853079
11/29/20 06:50 PM
11/29/20 06:50 PM
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Deland, Florida
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biff426 Offline
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How much cam endplay ? What kind of button are you using? I have a new gear I found in my trailer that I had as a spare $25 and I'll ship it to you. I was going to list it here in the next week or so.

Re: Bronze Gear Wear [Re: fast68plymouth] #2853080
11/29/20 06:51 PM
11/29/20 06:51 PM
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Chargerfan68 Offline
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Originally Posted by fast68plymouth
Originally Posted by 6PakBee
So what is the solution?


As I already mentioned....... the melonized steel gear.

You just have to have a combo where a std pressure/std volume oil pump will work for you.



I agree. This seems to be true. I have a roller cam in my street car that i inspected at about 2500 street miles and the wear was very insignificant. It has a Std volume oil pump.


1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.
Re: Bronze Gear Wear [Re: MarkZ] #2853082
11/29/20 06:53 PM
11/29/20 06:53 PM
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Wow, that gear is really worn. I've never seen one worn down that far. If that happened after only 3000 miles then you'll need to find another solution. The gear that Hughes Engines sells might solve the problem for you.

Re: Bronze Gear Wear [Re: MarkZ] #2853084
11/29/20 06:58 PM
11/29/20 06:58 PM
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polyspheric Offline
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I agree, it's way past toast, don't even crank the engine again or you'll be looking for the broken teeth.

With that much play your piston-to-valve clearance isn't how you set it up - take a look for marks.

I've heard cryo treatment helps extend gear life, but no actual tests TIKO.

No matter how wet it looks with the cover off, believe me more oil can't hurt. Many older engines have directed oil (my 1958 Chevy 235 L6 stovebolt has a spray nozzle), or at least a drool hole above the cam to insure they're wet enough. Is there something like this for your engine?


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Re: Bronze Gear Wear [Re: AndyF] #2853094
11/29/20 07:09 PM
11/29/20 07:09 PM
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So. Burlington, Vt.
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fast68plymouth Offline
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Here is a pic of my circa-1995 bronze gear.
This was bought as just the gear, and I pressed it onto a used stock shaft.

No street miles....... but was run for two dyno sessions and about 250 1/4 mile passes over the course of 3 seasons.

1BF29EFB-625B-42DE-B697-D735B07F626D.pngB777839F-8C86-4ED9-B9C0-AFD1DD4A5E4D.png

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Bronze Gear Wear [Re: polyspheric] #2853099
11/29/20 07:12 PM
11/29/20 07:12 PM
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So. Burlington, Vt.
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Quote
With that much play your piston-to-valve clearance isn't how you set it up.


Oil pump drive gear .........vs........ valve to piston clearance?


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Bronze Gear Wear [Re: fast68plymouth] #2853110
11/29/20 07:31 PM
11/29/20 07:31 PM
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Michigan
MarkZ Offline OP
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Originally Posted by fast68plymouth
Uuuhh...... yeh.
That’s toast.

In fact it was toast when it had 1/2 that much wear.

Might want to look into the melonized steel gear.

High volume or high pressure oil pump?


You are correct, it is a billet steel core. I knew these things were sacrificial, but didn't expect it to be toast this soon. It actually cut me pulling it out.

Motor has a standard Melling pump, but I run Brad Penn 20w50. It'll have over 70lbs of pressure until warm and settle down to 45lbs.

I'll call Comp Cams tomorrow regarding the melonized gear. Will change the oil to a thinner weight before I start it up again too.


1987 Fifth Avenue - 512/518/D60
Re: Bronze Gear Wear [Re: MarkZ] #2853113
11/29/20 07:37 PM
11/29/20 07:37 PM
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fast68plymouth Offline
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I don’t know if Comp carries that gear or not.

Crane did at one time, don’t know if they still do.

Hughes has them.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Bronze Gear Wear [Re: fast68plymouth] #2853114
11/29/20 07:39 PM
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Michigan
MarkZ Offline OP
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Originally Posted by fast68plymouth
I don’t know if Comp carries that gear or not.

Crane did at one time, don’t know if they still do.

Hughes has them.


Is this the one you and Andy are referring to?

http://www.hughesengines.com/Index/products.php?browse=search&search=gear&partid=28107

I really appreciate the time answering my noob questions. Thank you.


1987 Fifth Avenue - 512/518/D60
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