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Installing gear on camshaft
Posted by: Bluebrier ()
Date: December 09, 2013 02:18PM

I am almost ready to install a new gear onto a new camshaft and want to be sure if all I am doing is right.
1.- Camshaft with new washer and key are on the freezer at 2ºF (waiting for possible lower temp.)
2.- A fixture is ready on the press, to hold gear perfectly flat and centered (used an old camshaft with gear for a perfect alignment).
3.- A thick washer is glued and centered on the fixture to hold gear and let shaft pass all the way.
4.- Will put the gear on the oven to max. temp. 450ºF for some 15-20 minutes after the shaft in the freezer rich lowest temp.
5.- Think on coating gear end of the shaft with synthetic oil.

Am I right ?…missing something ?

Thanks

Daniel Monasterio

Daniel Monasterio
64 Customized Greenbrier (The Bluebrier)
67 Customized Cpe. (Andariego)
Guadalajara, México

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Re: Installing gear on camshaft
Posted by: dansk ()
Date: December 09, 2013 02:31PM

Just set up the camshaft, install washer, set the gear on top making sure it's on the key. Heat cam gear with a propane torch (like the one you use for soldering), and press on.
Don't hold torch in one place too long, just get the aluminum nice and hot.
Dann

Dann
So. Calif.
Granada Hills
Daily drivers
1996 Ford E350 Powerstroke diesel
2003 Volkwagen Jetta
Fun cars
1965 Corsa Turbo (currently undergoing total restoration) + 65 Corsa 140 waiting for resto
1994 Dodge Viper RT10
1996 Dodge Viper GTS
1998 Dodge Viper GT2

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Re: Installing gear on camshaft
Posted by: dryenko ()
Date: December 09, 2013 02:37PM

Don't heat the aluminum much over 400 degrees for very long, as it will anneal the material.
A heat sensing temperature detecting tool is suggested, especially if using any sort of torch.
It is best , to get full expansion, to heat the gear uniformly in a oven, as you have suggested.
If you can get some dry ice and acetone, you can cool the camshaft to a even lower temperature.
I use gear oil for lubricant, since it has a anti-sieze additive.

Bob C aka Dryenko
Dobson, NC 27017

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Re: Installing gear on camshaft
Posted by: Bluebrier ()
Date: December 09, 2013 02:43PM

I'll use a propane torch for a a while only, just to replace lost heat while moving from the oven to the press fixture.

Thanks !!

Daniel Monasterio
64 Customized Greenbrier (The Bluebrier)
67 Customized Cpe. (Andariego)
Guadalajara, México

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Re: Installing gear on camshaft
Posted by: dansk ()
Date: December 09, 2013 02:53PM

You will know while pressing on if it cools too fast. It will get hard to press. Just stop and heat a little more before you continue.
Dann

Dann
So. Calif.
Granada Hills
Daily drivers
1996 Ford E350 Powerstroke diesel
2003 Volkwagen Jetta
Fun cars
1965 Corsa Turbo (currently undergoing total restoration) + 65 Corsa 140 waiting for resto
1994 Dodge Viper RT10
1996 Dodge Viper GTS
1998 Dodge Viper GT2

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Re: Installing gear on camshaft
Posted by: dansk ()
Date: December 09, 2013 02:54PM

If you're doing a fail safe, do the same to the ring after the gear has cooled down.

Dann
So. Calif.
Granada Hills
Daily drivers
1996 Ford E350 Powerstroke diesel
2003 Volkwagen Jetta
Fun cars
1965 Corsa Turbo (currently undergoing total restoration) + 65 Corsa 140 waiting for resto
1994 Dodge Viper RT10
1996 Dodge Viper GTS
1998 Dodge Viper GT2

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Re: Installing gear on camshaft
Posted by: wingnutandme ()
Date: December 09, 2013 02:58PM

We used to use a crock pot full of engine oil to heat gears and bearings. On high setting a crock pot will get up to around 400 degrees.

Wingnut and Me

Pine Mountain GA
and sometimes northern lower Michigan

61 Rampside
61 Lakewood 700 x 2
62 700 Wagon
63 Corvan
64 Monza Coupe (for sale)
64 8 door Corvan
65 Monza Coupe
Ultra Van #328

Secretary/Treasurer Corvanatics
CORSA, VCE, VCCA

Plus a 74 Vega Kammback, 75 Cosworth Vega, 64 1/2 Mustang, 80 Triumph TR7 Vert

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Re: Installing gear on camshaft
Posted by: Scott V ()
Date: December 09, 2013 03:00PM

dryenko Wrote:
-------------------------------------------------------
> Don't heat the aluminum much over 400 degrees for
> very long, as it will anneal the material.

cnicol posted here that it takes 700-800 degrees to anneal the aluminum gear.

which is right?

-Scott V.

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Re: Installing gear on camshaft
Posted by: Bluebrier ()
Date: December 09, 2013 03:34PM

Done !!…the camshaft slided real easy into the gear with very little or almost no pressure. Thanks guys !!

Daniel Monasterio
64 Customized Greenbrier (The Bluebrier)
67 Customized Cpe. (Andariego)
Guadalajara, México

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Re: Installing gear on camshaft
Posted by: MattNall ()
Date: December 09, 2013 03:47PM

Glad it was fun!!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Installing gear on camshaft
Posted by: dansk ()
Date: December 09, 2013 04:47PM

Craig is right!
Dann





Scott V Wrote:
-------------------------------------------------------
> dryenko Wrote:
> --------------------------------------------------
> -----
> > Don't heat the aluminum much over 400 degrees
> for
> > very long, as it will anneal the material.
>
> cnicol posted here that it takes 700-800 degrees
> to anneal the aluminum gear.
>
> which is right?
>
> -Scott V.

Dann
So. Calif.
Granada Hills
Daily drivers
1996 Ford E350 Powerstroke diesel
2003 Volkwagen Jetta
Fun cars
1965 Corsa Turbo (currently undergoing total restoration) + 65 Corsa 140 waiting for resto
1994 Dodge Viper RT10
1996 Dodge Viper GTS
1998 Dodge Viper GT2

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Re: Installing gear on camshaft
Posted by: vairmech ()
Date: December 09, 2013 05:10PM

The only way to aneal aluminum is to quench it. If you heat it and cool at a controlled cool down you will temper it or work harden.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Installing gear on camshaft
Posted by: 63turbo ()
Date: December 09, 2013 06:38PM

Generally speaking Craig is right because the annealing temperature is usually
half the melting point- and dryenko is right FOR CERTAIN ALUMINUM ALLOYS. The ones that mechanical properties improved by cold working (6061 t-6 for example)
lose much of their strength at surprisingly low temperatures- see this for more
information [www.keytometals.com]
Kevin

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Re: Installing gear on camshaft
Posted by: Bob Helt ()
Date: December 09, 2013 08:55PM

Well, yes, you did overlook one important thing.

You MUST retain the insertion pressure on the gear until it cools. That is so the washer will be held firmly and not able to rotate separately around the cam.
A loose washer is an invitation to a displaced cam gear in operation.
Regards,
Bob Helt

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Re: Installing gear on camshaft
Posted by: Bluebrier ()
Date: December 10, 2013 08:51AM

Bob Helt Wrote:
-------------------------------------------------------
> Well, yes, you did overlook one important thing.
>
> You MUST retain the insertion pressure on the gear
> until it cools. That is so the washer will be held
> firmly and not able to rotate separately around
> the cam.
> A loose washer is an invitation to a displaced cam
> gear in operation.
> Regards,
> Bob Helt

Did it this way. Released pressure some 20 minutes after insertion. Gear was at about 90ºF. Washer is tight on it's place.

Daniel Monasterio
64 Customized Greenbrier (The Bluebrier)
67 Customized Cpe. (Andariego)
Guadalajara, México

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Re: Installing gear on camshaft
Posted by: Lalkie ()
Date: July 08, 2018 02:32PM

I just pulled my cam and the thrust washer is spinning on the cam. From reading this post that appears to be the reason it is damaged. The thrust washer probably moves .060 on the shaft. Do you guys put locktite on the gear so it wont slip? Did you guys heat the gear to get it off? Thanks Larry

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Re: Installing gear on camshaft
Posted by: MattNall ()
Date: July 08, 2018 05:03PM

Gear is aluminum... doesn't matter during disassembly.... only during assembly.





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Installing gear on camshaft
Posted by: ROD ()
Date: July 08, 2018 05:53PM

.060 end play at the thrust washer ? That would be grossly loose

Rod Tetrault
El Cajon , CA
65 Corsa Yenko Clone / 65 Corsa EO Creampuff Vert
66 Corsa "JIMISH" Mid engine Turbo LS1 currently 2nd fastest Corvair in the USA
Class 5 Corvair powered Baja
61 Vintage Rampy
Corvair powered Buggy x 3
Enough hidden parts to build a space ship

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Re: Installing gear on camshaft
Posted by: Lalkie ()
Date: July 08, 2018 05:59PM

I think the .060 play on the thrust washer was the cause of failure. The car had run about 5000 miles before it began making noise when starting but running fine after starting. As far as I can tell the washer should not spin at all when you press on the cam gear. Is this correct? Thanks Larry

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Re: Installing gear on camshaft
Posted by: ROD ()
Date: July 08, 2018 06:06PM

The washer often spins behind the gear after it cools. But no gross amount of end play .060 is almost double a spark plug gap yes your old cam gear was walking off who knows how ... someone may have pressed it on cold last time if I had to guess.

Rod Tetrault
El Cajon , CA
65 Corsa Yenko Clone / 65 Corsa EO Creampuff Vert
66 Corsa "JIMISH" Mid engine Turbo LS1 currently 2nd fastest Corvair in the USA
Class 5 Corvair powered Baja
61 Vintage Rampy
Corvair powered Buggy x 3
Enough hidden parts to build a space ship

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