Oil Relief spot face tool

python12456 · Posted: Fri Sep 18, 2015 5:46 am Post subject: Oil Relief spot face tool

I am looking to buy or borrow a Oil Relief spot face tool to clean up my case. It looks like someone tried before and didn't do to good. Thanks

Art Thraen · Posted: Sun Sep 20, 2015 1:46 am Post subject:

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74 Thing · Samba Member Joined: September 02, 2004 Posts: 7389

John @ aircooled.net used to rent them out. You may want to contact him.

python12456 · Posted: Sun Sep 20, 2015 5:10 pm Post subject: oil relief

ive contacted aircooled.net they don't have anymore for sale or rent thanks anyway

Thing_Man73 · Posted: Sun Sep 20, 2015 5:30 pm Post subject:

You can us a standard short flute, flat bottom, no corner radii 16mm Endmill.
You can buy one from McMaster-Carr

mark tucker · Posted: Sun Sep 20, 2015 6:49 pm Post subject:

mine has a guide on it so it doesnt effup the bore.
Ive seen the later hyd cases that have the oil gally offset about 2~3 mm and they were chattered all to hell when they were serfaced from the factory.probably due to the offset oil gally hole

nsracing · Posted: Mon Sep 21, 2015 4:19 pm Post subject:

I ground several before and they are all gone/sold. Im not sure when I can make them again.

It is not that hard to make them if you have a cylindrical grinder.

Don't use an endmill as it will cut the inside walls and that will really screw up the case. The tool should only allow an end-cut....not a sidewall cut.

modok · Posted: Mon Sep 21, 2015 5:09 pm Post subject:

End mill will work but it does not take much to cut mag. I made mine from a french moped crank. Just have to find a something 18mm and sharpen it!

python12456 · Posted: Mon Sep 21, 2015 6:20 pm Post subject: Spot facing tool

I thought they needed to be 16mm or is it 18mm.
I found a 16mm 4 flute end mill

modok · Posted: Mon Sep 21, 2015 6:29 pm Post subject:

it might be 16, I don't recall. Just measure a plunger!

Thing_Man73 · Posted: Mon Sep 21, 2015 6:30 pm Post subject:

gprudenciop · Posted: Mon Sep 21, 2015 6:33 pm Post subject:

i went ala vw owner cheap!! Laughing

gorilla glue sand paper cloth to the bottom of an old plunger inserted tap on the other side and bam!! add to drill and enjoy...
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Mad Manx · Posted: Mon Sep 21, 2015 6:54 pm Post subject:

mark tucker · Posted: Mon Sep 21, 2015 7:42 pm Post subject:

mine is a modified shortened sharpened ,reamer with a sleve for a guide and protection. the sand paper method may work, just be sure to keep it clean.

jfats808 · Posted: Mon Sep 21, 2015 11:45 pm Post subject:

I had a machinist friend tap, thread and make a stem for my end mill. Gotta be delicate when drilling with the press and it's usually just a skim off the surface flat. Ran into too many cases with pounded relief valve seats.

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