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Randy G |
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#1
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Newbie ![]() Group: Members Posts: 7 Joined: 1-February 15 From: Kalama, Washington Member No.: 18,386 Region Association: None ![]() |
I recently read about setting the valve lash at 0.0" in a type IV engine. He was running swivel foot adjusters. How can this be??????? If so it would certainly make the engine quieter.
Randy |
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Cevan |
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#2
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Senior Member ![]() ![]() ![]() Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351 ![]() |
You were probably reading about someone who was using chromoly pushrods, instead of the stock aluminum ones. Aluminum ones expand when they get hot.
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Randy G |
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#3
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Newbie ![]() Group: Members Posts: 7 Joined: 1-February 15 From: Kalama, Washington Member No.: 18,386 Region Association: None ![]() |
Yes, I remember that now. Is that a good idea?
Randy |
malcolm2 |
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#4
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States ![]() ![]() |
Yes, I remember that now. Is that a good idea? Randy It is what is recommended for the Chromoly material. I have them and attempt to set them that way, with swivel foot adjusters. The Chromoly does not expand the same amount as OEM. You adjust with the engine cold. If the foot will spin and my smallest feeler gauge will NOT fit, I call that ZERO. I think I remember reading that the non-swivel foot method would be to attempt to spin the push-rod. Next adjustment cycle I plan to check that. Here is a question for the group. If you did not install Chromoly yourself, how do you know if you have them or not? Let's say, on a recent car purchase, or maybe the PO told you and you want to verify. |
stugray |
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#5
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None ![]() |
Does a magnet stick to chromoly?
I dont know because the only item I have that I am sure is chromoly are my pushrods in the engine... |
Mark Henry |
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#6
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that's what I do! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada ![]() |
Yes, I remember that now. Is that a good idea? Randy It is what is recommended for the Chromoly material. I have them and attempt to set them that way, with swivel foot adjusters. The Chromoly does not expand the same amount as OEM. You adjust with the engine cold. If the foot will spin and my smallest feeler gauge will NOT fit, I call that ZERO. I think I remember reading that the non-swivel foot method would be to attempt to spin the push-rod. Next adjustment cycle I plan to check that. Here is a question for the group. If you did not install Chromoly yourself, how do you know if you have them or not? Let's say, on a recent car purchase, or maybe the PO told you and you want to verify. If you have dual springs mild steel PR's will bend like pretzels. I think CrMo and steel would have about the same expansion rates. I always spin the PR to get zero lash. |
Randy G |
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#7
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Newbie ![]() Group: Members Posts: 7 Joined: 1-February 15 From: Kalama, Washington Member No.: 18,386 Region Association: None ![]() |
I have dual springs to allow for higher revs but I may go back to standard singles and eliminate some potential problems. The chromaloy push rods sound like a good way to go since I already have the swivel foot adjusters. Randy
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Dave_Darling |
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#8
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914 Idiot ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 15,200 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California ![]() ![]() |
I believe the Chromo pushrods are noticeably thinner than the aluminum ones.
--DD |
colingreene |
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#9
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Senior Member ![]() ![]() ![]() Group: Members Posts: 742 Joined: 17-October 13 From: Southern California Member No.: 16,526 Region Association: Southern California ![]() |
That they are.
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Mark Henry |
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#10
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that's what I do! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada ![]() |
I have dual springs to allow for higher revs but I may go back to standard singles and eliminate some potential problems. The chromaloy push rods sound like a good way to go since I already have the swivel foot adjusters. Randy What problems? You may also cause problems if you have a performance cam. Your head spring bosses would be cut if you have dual springs and if you install a single it will not have the interior boss support. |
Randy G |
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#11
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Newbie ![]() Group: Members Posts: 7 Joined: 1-February 15 From: Kalama, Washington Member No.: 18,386 Region Association: None ![]() |
I have dual springs to allow for higher revs but I may go back to standard singles and eliminate some potential problems. The chromaloy push rods sound like a good way to go since I already have the swivel foot adjusters. Randy What problems? You may also cause problems if you have a performance cam. Your head spring bosses would be cut if you have dual springs and if you install a single it will not have the interior boss support. Thanks for that tip. Engines are really not that complicated. I have several successful rebuilds under my belt but all were basically stock. It's amazing how many small things a person has to know or learn to even mildly modify an engine and have it work! Randy |
r_towle |
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#12
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Custom Member ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States ![]() ![]() |
has anyone studied the difference that the swivel foot adjusters deliver versus the stock adjusters?
Based upon the geometry, the stock adjusters actually spin the valve each cycle just a bit. Does that still occur with the swivel foot adjusters? Are they more accurate in maintaining the correct adjustments over the long period? rich |
Bulldog9 |
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#13
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Senior Member ![]() ![]() ![]() Group: Members Posts: 705 Joined: 21-August 13 From: United States Member No.: 16,283 Region Association: MidAtlantic Region ![]() |
has anyone studied the difference that the swivel foot adjusters deliver versus the stock adjusters? Based upon the geometry, the stock adjusters actually spin the valve each cycle just a bit. Does that still occur with the swivel foot adjusters? Are they more accurate in maintaining the correct adjustments over the long period? rich I've wondered the same. Cant see how they would as spinning the valve would take much more resistance than spinning the swivel foot, so My guess would be the valve does not spin, the swivel head does. |
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