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Pushrod Seal Replacement - Simplistic Procedure
Posted by: Lane66m ()
Date: January 09, 2018 04:41AM

In the attachments you will find the simplest method I came up with to do the pushrod seal replacement and valve cold adjustment on the Greenbrier. I didn't want the jumping around from side to side of the engine and rotating the engine several times to get the job done.

Please note, the procedure recently added to the FAQs is missing the second page. S so it will leave you in a black hole half way in the task and back to Chevrolet manual you go.

I have also attached the valve cover mod you can do for the hot valve adjustment. This mod diagram can be found in the Corsa Corvair Technical Guide.

If is anything there is missing, send me a PM. I will revise it and update this discussion. I am not trying to make this do everything. Basic mechanical knowledge and knowing the Corvair engine layout is expected.





Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1968 Camaro SS Coupe 350 CI 295+ HP PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2018 Chevrolet Silverado LTZ Z71 Centennial Edition
1947 Farmall A tractor 15 hp





Edited 3 time(s). Last edit at 01/09/2018 09:30PM by MattNall.

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Re: Pushrod Seal Replacement Replacement - Simplistic Procedure
Posted by: toms73novass ()
Date: January 09, 2018 04:45AM

Nice!thumbs up

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
65' Monza MY Build Thread
73' NovaSS 454 Big block
86' BMW 325es
98' Dodge 2500 12v Cummins Diesel with 1200 lb torque!
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

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Re: Pushrod Seal Replacement- Simplistic Procedure
Posted by: Lane66m ()
Date: January 09, 2018 04:46AM

Thank you, Tom


Corrected title

Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1968 Camaro SS Coupe 350 CI 295+ HP PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2018 Chevrolet Silverado LTZ Z71 Centennial Edition
1947 Farmall A tractor 15 hp





Edited 1 time(s). Last edit at 01/09/2018 04:47AM by Lane66m.

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Re: Pushrod Seal Replacement - Simplistic Procedure
Posted by: ihscomputers ()
Date: January 09, 2018 04:52AM

This is great and seems to be pretty thorough!

Dean F. Gemberling
Columbus, Georgia


1963 Rampside w/305 V8 - Built by Ken Arnold in 1998

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Re: Pushrod Seal Replacement - Simplistic Procedure
Posted by: Lane66m ()
Date: January 09, 2018 04:55AM

Nice thing is you can print it out and laminate it. Leave it with a grease pencil. When you do the procedure, mark each item when you have done it. Leave for hours or days or weeks. Come back and pick up where you left off.

Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1968 Camaro SS Coupe 350 CI 295+ HP PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2018 Chevrolet Silverado LTZ Z71 Centennial Edition
1947 Farmall A tractor 15 hp


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Re: Pushrod Seal Replacement - Simplistic Procedure
Posted by: Wagon Master ()
Date: January 09, 2018 06:22AM

Good write up.



Edited 1 time(s). Last edit at 01/09/2018 06:24AM by Wagon Master.

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Re: Pushrod Seal Replacement - Simplistic Procedure
Posted by: toms73novass ()
Date: January 09, 2018 07:03AM

Quick question about valve cover,

Is the drilled hole cover much better than the half covers?

I already have a set of half covers, would it be worth making the drilled versions?

-Tom


63' Monza Spyder Convertable (in process) MY Build Thread
65' Monza MY Build Thread
73' NovaSS 454 Big block
86' BMW 325es
98' Dodge 2500 12v Cummins Diesel with 1200 lb torque!
98' VW Jetta TDI, for daughter
01' Audi Allroad Stage 3 twin turbo

NFCC
Grand Island, NY

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Re: Pushrod Seal Replacement - Simplistic Procedure
Posted by: azdave ()
Date: January 09, 2018 07:26AM

toms73novass Wrote:
-------------------------------------------------------
> Is the drilled hole cover much better than the
> half covers?
>
> I already have a set of half covers, would it be
> worth making the drilled versions?

A drilled-hole cover is maybe slightly less messy depending on how much oil your engine slings around. I have a cover with holes because I owned a panel punch at the time.

Don't forget...Real men don't need punched or half covers...they adjust the valves cold!! grinning smiley


Dave W. / Gilbert Arizona
66 Corsa 140 4-speed w/factory A/C
66 Corsa 140 4-speed
65 Corsa 140 4-speed
66 Corsa 455 Toro V8
65 Monza 455 Toro V8
65 Monza 110 Convertible
65 Monza 4DR 140 PG w/factory A/C
65 Monza 4DR EJ20T w/5-speed




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Re: Pushrod Seal Replacement - Simplistic Procedure
Posted by: Frank DuVal ()
Date: January 09, 2018 10:12AM

Quote
Dave
Don't forget...Real men don't need punched or half covers...they adjust the valves cold!!

I thought you were going to say: Real men don't need punched or half covers....they get their hot oil skin treatments while doing valve adjusting!eye popping smiley

Frank DuVal

Fredericksburg, VA

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Re: Pushrod Seal Replacement - Simplistic Procedure
Posted by: Lane66m ()
Date: January 09, 2018 11:50AM

Chevrolet manual states:

Turn crankshaft one turn counter-clockwise.

So I will correct my error and repost. I was thinking 180 though a firing cycle. Typical of a REAL old engine mechanic. SORRY.

Matt: Please delete the fist post attachments or I can send you the replacements in about two minutes.

Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1968 Camaro SS Coupe 350 CI 295+ HP PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2018 Chevrolet Silverado LTZ Z71 Centennial Edition
1947 Farmall A tractor 15 hp


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Re: Pushrod Seal Replacement - Simplistic Procedure
Posted by: Lane66m ()
Date: January 09, 2018 12:05PM

I just sent replacements for the non-error-free ones in the original post.

Anyone wanting the original PDF can PM me their email address and I will forward the file.

Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1968 Camaro SS Coupe 350 CI 295+ HP PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2018 Chevrolet Silverado LTZ Z71 Centennial Edition
1947 Farmall A tractor 15 hp


Attachments:

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Re: Pushrod Seal Replacement - Simplistic Procedure
Posted by: JimBrandberg ()
Date: January 10, 2018 04:58AM

I do one cylinder at a time with the piston at TDC ready to fire, both valves are well closed at this time. I use the rotor location or mark the HB 120 degrees apart. I only loosen the bottom 2 (rocker stud) one cylinder at a time and retorque to 30 before moving on, 35 is a bit much for me. I adjust the rockers 3/4 turn down from zero lash as I go.
The theory might be better to loosen and retorque the whole head but the potential problems with the top nuts outweigh the theory for me.
I can do one side and then the other or switch side to side depending on the mood I'm in. Rotating the engine after each cylinder is a small thing in the overall process for me.
I know the Shop Manual calls for doing half the adjustments at #1 TDC firing and half the adjustments at #2 TDC firing positions but I just never cared for it. It seems like which ones to do when in the Shop Manual are a little different than what's suggested above.
I roll the pushrods on my countertop to make sure they're not bent and inspect the rocker arms for cracking and the balls for galling.
Holding the pushrod in the lifter pocket and getting a feel for zero lash seem to be the things that get easier the more you do it.
I've also got a rocker stud with a ball bearing in it for installing crankcase studs if they come out.
I'm certainly not criticizing the method you suggest, thanks for posting.
Jim Brandberg
Isanti, MN
CorvairRepair.com

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Re: Pushrod Seal Replacement - Simplistic Procedure
Posted by: cnicol ()
Date: January 10, 2018 07:22AM

The procedure Jim Brandberg outlined is exactly how I do it. One cylinder at a time from start to finish. You get zero lash on that single cylinder regardless of camshaft. You don't have to identify intake vs. exhaust, and you can walk away and know exactly where you are when you come back.

One slight adjustment: I often jack-up one side (so the car is tipped) and do 2,4,6 then jack-up the other side and do 1,3,5. Tilting keeps any oil from coming out the pushrod tube holes in the block (I think that's a "thing"). This also creates a nice "break point" if you want to do the job in parts.

Nice write up, Al! I like the idea of laminating it so it becomes an "in your hand" Job Aid.

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts




Edited 1 time(s). Last edit at 01/10/2018 07:24AM by cnicol.

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Re: Pushrod Seal Replacement - Simplistic Procedure
Posted by: schuls1 ()
Date: January 10, 2018 10:38AM

X3 on adjusting the valves cold using the single cylinder at a time method. I have done it that way for decades and never a problem.

Stan
SW Missouri

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Re: Pushrod Seal Replacement - Simplistic Procedure
Posted by: Frank DuVal ()
Date: January 10, 2018 12:41PM

40 ft-lbs is slightly much.

Early (145 cu in) engines are 27 to 33 ft-lbs.

Late (164 cu in) are 32 to 38 ft lbs. OK, close to 40....winking smiley

Interesting, Page 6A-9 of the 64 supplement says:

Complete assembly of the cylinder head as outlined
on page 6A-36 of the 1961 Corvair Shop Manual,
except final torque all valve rocker studs and
cylinder head stud nuts.

But, Page 6A-12 states the cylinder head nuts and studs are 27 to 33 ft lbs....


I use 360 inch pounds for earlies and 400 inch pounds for lates....grinning smiley

YMMV

Frank DuVal

Fredericksburg, VA

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