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msaltz Samba Member
Joined: October 24, 2015 Posts: 42 Location: Fallbrook
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Posted: Thu Aug 02, 2018 6:59 pm Post subject: Valve Springs for setting up Rocker Geometry |
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When setting up/adjusting rocker geometry using an adjustable push rod is there a weaker valve spring that should be installed? If so does anybody have a source for where to get them? Any insight would be greatly appreciated. |
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vwracerdave Samba Member

Joined: November 11, 2004 Posts: 15599 Location: Deep in the 405
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Posted: Thu Aug 02, 2018 8:44 pm Post subject: Re: Valve Springs for setting up Rocker Geometry |
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I bought a couple of $2.00 springs at the local hardware store that were about the size of a VW valve spring and I could compress with my fingers. Jeg's and Summit also sell checking springs. _________________ 2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK |
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vince1 Samba Member

Joined: December 14, 2003 Posts: 836 Location: Burgundy, France
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msaltz Samba Member
Joined: October 24, 2015 Posts: 42 Location: Fallbrook
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Posted: Fri Aug 03, 2018 2:57 pm Post subject: Re: Valve Springs for setting up Rocker Geometry |
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Thanks for the info. Never thought of checking the hardware store. I'll check there first and see what they have.
The type 4 rocker end play springs do look like the ticket though. |
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UK Luke 72 Samba Member

Joined: September 07, 2011 Posts: 2875 Location: Little Britain
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FreeBug Samba Member
Joined: March 12, 2012 Posts: 4277 Location: deepest, darkest Switzerland
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Posted: Sat Aug 04, 2018 10:29 pm Post subject: Re: Valve Springs for setting up Rocker Geometry |
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In a pinch you can wrap coat hanger wire around a piston pin. Works. |
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Sharp64 Samba Member

Joined: August 27, 2015 Posts: 5304 Location: Central Florida
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Posted: Sun Dec 29, 2019 11:20 am Post subject: Re: Valve Springs for setting up Rocker Geometry |
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Tried searching and couldn’t find the answer. But what is the reasoning behind using a softer spring when setting geometry? Is it due to using the adjustable rod? _________________ 1960 Indigo Blue Ragtop (Blue Barry)
1967 Ghia
1985 Westy Money Pit
“...some men aren't looking for anything logical, like money. They can't be bought, bullied, reasoned, or negotiated with. Some men just want to watch the world burn.” - Michael Caine |
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67rustavenger Samba Member

Joined: February 24, 2015 Posts: 11022 Location: Oregon
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Posted: Sun Dec 29, 2019 11:26 am Post subject: Re: Valve Springs for setting up Rocker Geometry |
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The softer spring is used to set the rocker geo. Without having to use the cam and lifters to move the rocker arm.
Basically you can get the geo set with the head off the engine when using the soft springs. I got my soft springs from Ace Hardware.
After the geo is set. You install the head and figure out the correct PR length.
Good Luck. _________________ I have learned over the years.
Cheap parts are gonna disappoint you.
Buy Once, Cry Once!
There's never enough time to do it right the first time. But there's always enough time to do it thrice.
GFY's Xevin and VW_Jimbo!
2003 Astrovan? GFYS again, Xevin!  |
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FreeBug Samba Member
Joined: March 12, 2012 Posts: 4277 Location: deepest, darkest Switzerland
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Posted: Sun Dec 29, 2019 11:46 am Post subject: Re: Valve Springs for setting up Rocker Geometry |
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67rustavenger wrote: |
The softer spring is used to set the rocker geo. Without having to use the cam and lifters to move the rocker arm.
Basically you can get the geo set with the head off the engine when using the soft springs. I got my soft springs from Ace Hardware.
After the geo is set. You install the head and figure out the correct PR length.
Good Luck. |
Is the wire clip hole offset like that on purpose? |
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67rustavenger Samba Member

Joined: February 24, 2015 Posts: 11022 Location: Oregon
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Posted: Sun Dec 29, 2019 11:51 am Post subject: Re: Valve Springs for setting up Rocker Geometry |
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FreeBug wrote: |
67rustavenger wrote: |
The softer spring is used to set the rocker geo. Without having to use the cam and lifters to move the rocker arm.
Basically you can get the geo set with the head off the engine when using the soft springs. I got my soft springs from Ace Hardware.
After the geo is set. You install the head and figure out the correct PR length.
Good Luck. |
Is the wire clip hole offset like that on purpose? |
The heads are Tim's stage 2. They came that way and the bails give the correct tension on the valve covers.
I can only imagine that the Tim's measured the distance to get the bail over the valve cover. Before the hole was drilled. _________________ I have learned over the years.
Cheap parts are gonna disappoint you.
Buy Once, Cry Once!
There's never enough time to do it right the first time. But there's always enough time to do it thrice.
GFY's Xevin and VW_Jimbo!
2003 Astrovan? GFYS again, Xevin!  |
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mark tucker Samba Member

Joined: April 08, 2009 Posts: 23950 Location: SHALIMAR ,FLORIDA
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Posted: Sun Dec 29, 2019 12:00 pm Post subject: Re: Valve Springs for setting up Rocker Geometry |
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my old pop up sprinklers have awesome stainless steel springs in them that are perfect. a spring is a spring if it will fit it will work.small dia or large as long as it 1 stays on the retainer,2 dosent coil bind. 3 has enough force& length to hold the valve closed. |
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bugguy1967 Samba Member
Joined: January 16, 2008 Posts: 4368 Location: Los Angeles, CA 90016
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Posted: Sun Dec 29, 2019 9:05 pm Post subject: Re: Valve Springs for setting up Rocker Geometry |
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Sharp64 wrote: |
Tried searching and couldn’t find the answer. But what is the reasoning behind using a softer spring when setting geometry? Is it due to using the adjustable rod? |
You get better results because your pushrod doesn't flex, the engine stays put when you turn it to a certain position instead of the spring pushing back, you can play with adjustments easily, you don't have to worry about the tension pushing your rocker sideways thus loosing lift, and other things. I was just outside doing geometry for my new engine. With my soft checking spring, I was able to push the retainer down, pull my lash cap and continuously check the swipe. _________________ "A petrol engine can start readily, run smoothly and give every appearance of being in good order, without necessarily being in good tune." - Colin Campbell, "The Sportscar Engine" |
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APPLEGREENVW Samba Member

Joined: November 30, 2003 Posts: 2546 Location: Seekonk,Massachusetts USA
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Onceler Samba Member
Joined: May 28, 2010 Posts: 1646 Location: Indiana
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Posted: Sun Dec 29, 2019 10:19 pm Post subject: Re: Valve Springs for setting up Rocker Geometry |
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67rustavenger wrote: |
The softer spring is used to set the rocker geo. Without having to use the cam and lifters to move the rocker arm.
Basically you can get the geo set with the head off the engine when using the soft springs. I got my soft springs from Ace Hardware.
After the geo is set. You install the head and figure out the correct PR length.
Good Luck. |
I’m currently trying to set geometry and admit I’m a bit of a moron, but how are you able to set geometry without installing cam and lifters and adjustable pushrod? I’d appreciate any tricks, cause this sucks _________________ 1972 Karmann Ghia |
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67rustavenger Samba Member

Joined: February 24, 2015 Posts: 11022 Location: Oregon
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Posted: Sun Dec 29, 2019 10:36 pm Post subject: Re: Valve Springs for setting up Rocker Geometry |
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Here's a thread on the topic. Read it all the way through! It'll make sense in the end.
https://www.thesamba.com/vw/forum/viewtopic.php?t=706356&highlight=
If you are trying to use the slipper type of rockers. You likely need to shave the rocker arm blocks (the ones on the rocker arm shaft. Not the head) 0.060".
I did mine on a belt sander and measured frequently as I shaved them to get the geo correct.
Good Luck. _________________ I have learned over the years.
Cheap parts are gonna disappoint you.
Buy Once, Cry Once!
There's never enough time to do it right the first time. But there's always enough time to do it thrice.
GFY's Xevin and VW_Jimbo!
2003 Astrovan? GFYS again, Xevin!  |
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