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post #421 of 572 (permalink) Old 05-05-2018, 08:06 PM
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I have a Starrett Mic that my Dad got when HE was in High School (machine shop class). Somewhere around 1935.

Did you know that Mic's get more accurate as they age? The constant screwing in and out slowly wears the hardened ultra fine threads to even them out across the whole range of the Mic.

BTW - I have a Slide Rule marked "Made in Occupied Japan" its superb and faster than a calculator if you know how to use it. So is the Abacus I have. Never did figure out how to do cube roots on an Abacus though. Calculators aren't so good at that either. Slide Rule is........



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post #422 of 572 (permalink) Old 05-06-2018, 07:54 PM Thread Starter
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I got the shims ordered, as well as a new pinion seal.

I can already see that it's going to be quite a project to make that pinion nut tool. I'm anticipating going through several abrasive discs on my dremel tool. ...that is unless someone has a better method to fabricate it.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #423 of 572 (permalink) Old 05-06-2018, 08:00 PM
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Quote:
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I can already see that it's going to be quite a project to make that pinion nut tool....that is unless someone has a better method to fabricate it.
Sure, just buy one. Centerline p/n TL101:


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post #424 of 572 (permalink) Old 05-06-2018, 09:42 PM
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We had some China marked "Made in Occupied Japan" and other stuff from Itazuke Tower this is Air Force 801
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The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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post #425 of 572 (permalink) Old 05-07-2018, 06:47 AM
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Shakey,
I made the pinion tool in 30 minutes, first time. I could likely make another in 20 minutes. The trick is to start with a 12 point socket, and then use an air powered disk grinder from HF to remove the metal. With a 12 point socket, it is simple to remove every other point. I used a digital caliper to measure the width of the teeth that were left. Really easy to make for about $3 for the socket. I can post pics of my socket and the air tool if requested.

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post #426 of 572 (permalink) Old 05-07-2018, 07:06 AM
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Duh, why didn't I think of that! great idea!

The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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post #427 of 572 (permalink) Old 05-07-2018, 07:35 AM Thread Starter
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@factotum, I don't have air tools, but I did give up on the dremel in favor of my electric grinder from HF; I think it will go much better.

I bought the 30mm socket from Menards; I probably should have bought one from Dollar General or something...a cheap socket would probably be easier to modify!

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #428 of 572 (permalink) Old 05-07-2018, 07:53 AM
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Yes, the 12 point socket also has thinner walls, so grinds down very easily as compared to the 6 point socket. My air tool uses a stiff 3" or so diameter grinding disk that is very thin, which worked great and got neatly into the corners of the cutouts. The pinion nut is not torqued down very tightly, so is easy to back out. At least mine was not torqued really tight.

However, Shakey, since you have tempted the Alfa gods by declaring in advance that you will have the only "no leak" Alfa in existence, they will ensure that you do get a leak, no matter what. These cars make us smile and keep us humble at the same time. My pinion seal still leaks just a small bit.

Chuck
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post #429 of 572 (permalink) Old 05-07-2018, 08:58 AM
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A "no leak" Alfa is one where the oil just drips on the floor. "Minor leaks" is when oil actively sprays out under pressure.
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1963 Giulia Spider (1750 engine)
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post #430 of 572 (permalink) Old 05-07-2018, 11:54 AM Thread Starter
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A "no leak" Alfa is one where the oil just drips on the floor. "Minor leaks" is when oil actively sprays out under pressure.
In aviation, we have "seeps" and "leaks". Leaks are a grounding condition; seeps are not.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #431 of 572 (permalink) Old 05-10-2018, 06:06 PM Thread Starter
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What is the secret to removing the pinion nut? I have fabricated the special tool, and it fits well. I've pressed out the dimples on each side of the shaft, but cannot get the nut to turn. I have the parking brake set, and both wheel chocked so they cannot turn. I'm putting so much force against the ratchet, that I'm concerned about damaging the clutches in the LSD.

I guess I'll press 'pause' on that for the night, to install the camshafts and check clearances on the new shims. I thought the pinion would be quick and easy; I should have known better.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #432 of 572 (permalink) Old 05-10-2018, 06:30 PM
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Quote:
What is the secret to removing the pinion nut?
It should come off easily with an impact wrench and the special socket. Otherwise you have to make a locking device for the flange.

Ed Prytherch
79 Spider
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
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post #433 of 572 (permalink) Old 05-10-2018, 07:40 PM
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A big f'ing pipe wrench to hold the flange will also work. The torque value for that nut is about 75ft lbs so an impact can require some back up help. There's no way the brake or in gear will hold solid enough to get it off.

The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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post #434 of 572 (permalink) Old 05-10-2018, 08:07 PM
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An impact wrench will get it off without locking the flange and it will get off nuts that are much tighter than that one, example crankshaft nut, gearbox output yoke nut without any locking device.

Ed Prytherch
79 Spider
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
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post #435 of 572 (permalink) Old 05-10-2018, 09:52 PM Thread Starter
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The car is up on jack stands, not a lift; that makes it difficult to get much leverage, and I can't get my trusty cast-iron gas pipe under there.

The shop manual shows a special tool that bolts onto the flange, with a tang that reaches down the side of the diff, keeping components from turning. Of course the manual also shows this being done with the axle out of the car.

I installed the camshafts tonight, and measured the clearances with the new shims. The intake spacing is spot on at .4mm at each follower. On the exhaust side, I have two followers measuring .02mm too narrow (.43mm instead of .45). I'll order a couple more shims, and will likely be spot on there as well.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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