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Oil Pump Check Ball Burnishing Tool

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MarkBranst

Posts: 347

Joined: Thu Jun 24, 2004 12:01 am

Location: Champaign-Urbana, IL

Post Thu Feb 06, 2014 9:57 pm

Oil Pump Check Ball Burnishing Tool

I don't have any personal experience with either the seller or the product, but I thought somebody might be interested ...

Resurrection Cycle, who seems to have been around for quite a few years, is advertising a new run of their specialty burnishing tool:

http://www.resurrectioncycle.com/oilpumptool.html

Obviously, if anybody has any specific experience with their product, it might be worth sharing.

Mark
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jib

Posts: 573

Joined: Sat Dec 10, 2005 3:36 pm

Location: devon,england

Post Sun Feb 09, 2014 3:47 pm

Re: Oil Pump Check Ball Burnishing Tool

didnt someone on here say there was a problem with the seats not being central?
Dude, check out that jibhead, he's crazy. Hasn't been sober for 40 years
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Cotten

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Joined: Thu Sep 30, 1999 12:01 am

Location: Central Illinois, USA

Post Tue Feb 11, 2014 8:39 am

Re: Oil Pump Check Ball Burnishing Tool

Twas I, Jib.

Burnishing was my "better idea', and I regret it greatly.

I no longer endorse burnishing. It has turned out to be a great embarrassment and loss for me, as the variations in pumps and their materials is too great. Some bodies are "chilled", and will only damage the burnisher, and chip the seat badly.

Upon developing different dressing tools, lapps, and burnishers, it became apparent that there was no way to accurately pilot off of the pump body cap threads, as they were quite often inconcentric with the seat.
Thus the only effective tool in my kit was a flat-bottomed stone, used to relieve the old seat to a sharp edge.

Upon bench testing with bubbles, it soon became obvious that was the best one can do, as any angle-grinds, burnishing, lapping, or even beating with a drift only made leakage worse, and occasionally did damage.

I would post pics, but the site's format will no longer accept my browser.

.....Cotten
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Pa

Site Admin

Posts: 4732

Joined: Sun Mar 12, 2000 1:01 am

Location: Ohio USA

Post Tue Feb 11, 2014 12:55 pm

Re: Oil Pump Check Ball Burnishing Tool

Cotton.....email me your pics and I will put them up for you.
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Cotten

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Posts: 2679

Joined: Thu Sep 30, 1999 12:01 am

Location: Central Illinois, USA

Post Tue Feb 11, 2014 1:13 pm

Re: Oil Pump Check Ball Burnishing Tool

Pa!

I tried to email you through the site for that last thread.
I then got on my wife's modern computer, and it wouldn't upload either..

.....Cotten
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Tim 435

Posts: 741

Joined: Mon Sep 01, 2003 12:01 am

Location: Pa. , USA

Post Tue Feb 11, 2014 8:00 pm

Re: Oil Pump Check Ball Burnishing Tool

Soooo that sweet burnishing tool I purchased a couple years ago should be scrapped ?
Vintage roadracing, Class C, AHRMA # 335
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Pa

Site Admin

Posts: 4732

Joined: Sun Mar 12, 2000 1:01 am

Location: Ohio USA

Post Wed Feb 12, 2014 6:54 am

Re: Oil Pump Check Ball Burnishing Tool

Cotten wrote:Pa!

I tried to email you through the site for that last thread.
I then got on my wife's modern computer, and it wouldn't upload either..

.....Cotten


Cotton. Email me direct. vtwinrebuild@yahoo.com
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Pa

Site Admin

Posts: 4732

Joined: Sun Mar 12, 2000 1:01 am

Location: Ohio USA

Post Wed Feb 12, 2014 10:03 pm

Re: Oil Pump Check Ball Burnishing Tool

Image

Image
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Curt!

Posts: 903

Joined: Sat Dec 30, 2000 1:01 am

Location: Hill City, Ks. USA

Post Fri Feb 14, 2014 1:06 pm

Re: Oil Pump Check Ball Burnishing Tool

Damn, sorry that didn't work out. I've burnished a couple of oil pumps, but never checked for leakage after i got done. I just assumed they were better of than when i started.
Curt!
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Cotten

User avatar

Posts: 2679

Joined: Thu Sep 30, 1999 12:01 am

Location: Central Illinois, USA

Post Fri Feb 14, 2014 1:30 pm

Re: Oil Pump Check Ball Burnishing Tool

Well, Tim,..

They work safely on aluminum pumps!

Still, inspite of some phenomenal successes,
I must abandon the whole notion based on bubbles.

Bubbles don't lie.

I lost a lot of time, effort, and a significant investment on this folly.
It would seem a burnisher might work best if the screw threads are very, very loose in the cap.
But the chance of damage to a "chilled" pump overrides the benefits.

Nobody is more sorry than I,

....Cotten
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bluesman

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Joined: Sat Mar 09, 2013 4:37 pm

Location: MA, USA

Post Thu Feb 20, 2014 2:22 pm

Re: Oil Pump Check Ball Burnishing Tool

Cotten;
Can you provide some detail to how you are testing the pumps exactly. You mentioned bubbles.....

thanks
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Cotten

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Posts: 2679

Joined: Thu Sep 30, 1999 12:01 am

Location: Central Illinois, USA

Post Thu Feb 20, 2014 2:50 pm

Re: Oil Pump Check Ball Burnishing Tool

Bluesman!

As you can see in the last attachment, a regulator was used to supply minimal airpressure to the ballcheck "well", with a golf tee crammed into the exit feed gallery.
Thus any air escaping the ball and seat will be displayed by a little soapy water as bubbles.

I spent days on several seats without ever getting a perfect seal.

....Cotten
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bluesman

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Joined: Sat Mar 09, 2013 4:37 pm

Location: MA, USA

Post Thu Feb 20, 2014 4:11 pm

Re: Oil Pump Check Ball Burnishing Tool

Really nice test setup. Is it possible that the high viscosity 50W oil under only the slight gravity (head) pressure from the oil line and tank is acts a lot differently than water under several PSI of air pressure and that is why you could never get a perfect seal? I wonder if they would not drip under just gravity pressure with 50W oil in a 2 foot vertical tube??

Reason I am asking, is I need to come up with a test myself. I have 3 pumps that all leak!
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Cotten

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Joined: Thu Sep 30, 1999 12:01 am

Location: Central Illinois, USA

Post Thu Feb 20, 2014 4:46 pm

Re: Oil Pump Check Ball Burnishing Tool

Bluesman!

The regulator and soap solution are something everyone should use every time a manifold is assembled.
Cheap Arbor Frate trinkets work quite well.

Of course oil will behave differently than air, but bubbles are absolute and undeniable. Nothing is missed. I only wish we could put a number on them.

Please post pics of your tests, if the forum format will allow it.
Timing your reservoir drain certainly puts a number on it, but don't we really want to cut straight to "zero"?

The Factory apparently drilled the "well" in one operation, and tapped it for the cap in a different set-up, causing the inconcentricity.
The well had a flat bottom, possibly from an end-mill, and a hole poked in the middle that the ball rests in.
Our Historical mystery is: What else did they do for a seat?

I'm thinking: nothing.

....Cotten

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