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Adjuster nut on T&D shaft rockers
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DRR Sportsman
Picture of Matrix
posted
Give me some possible reasons why an adjuster nut may back off. My uncle is running a set on his brodix 16 degree heads and the #8 intake adjuster nut keeps backing off after maybe 15 runs. Kept him from running in the finals last night.


Daryl Pinder

Dynasty Motorsports
www.dynastymotorsports.com


 
Posts: 456 | Location: Ft. Washington, MD USA | Registered: March 05, 2001Reply With QuoteReport This Post
DRR Top Comp
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Check the valve springs.

Valve float

Spring surge possibly too.
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
DRR Elite
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Is he torquing them to 20 ft./lbs.?
 
Posts: 13522 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR Sportsman
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Check the lifter too
 
Posts: 612 | Location: nw ohio | Registered: November 20, 2001Reply With QuoteReport This Post
DRR Trophy
Picture of TheBlueTruck
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I'd vote also with underlying problems. If everything is right they wont move that much.


Regan Wilson Super Street 469C
 
Posts: 297 | Location: Tyler Texas | Registered: February 24, 2011Reply With QuoteReport This Post
DRR Top Comp
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Flat tappet cam?


.
Dave



F J B

 
Posts: 4497 | Location: Earth | Registered: February 08, 2006Reply With QuoteReport This Post
DRR Sportsman
Picture of Matrix
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Mike - car didn't shift in the semis and bumped the limiter so that may be it

Ed - Good point. Ill find out


Daryl Pinder

Dynasty Motorsports
www.dynastymotorsports.com


 
Posts: 456 | Location: Ft. Washington, MD USA | Registered: March 05, 2001Reply With QuoteReport This Post



DRR Pro
Picture of rusty
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bad threads on adjuster and or nut ,seat area not machined square anymore,wild longshot look at the cup and pushrod for wear,maybe poor lube and combination af things,the pushrod is trying to turn the adjuster.this could be from bent pushrod


honesty is the best policy,insanity is a better deffense
1.036, 6.16@ 224

 
Posts: 1438 | Location: texas | Registered: February 17, 2006Reply With QuoteReport This Post
DRR S/Pro
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X 3 on checking for something else that can cause the problem, like maybe a lifter. Worth looking into before something far worse /more expensive dies.

Bob
 
Posts: 3125 | Location: Lakeside, Ca | Registered: February 15, 2003Reply With QuoteReport This Post
DRR Top Comp
Picture of Curly1
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I would say you have some other issue causing it. Wrong length push rods, coil bind, valve float, lash problem or something.


https://postimg.cc/gallery/np3zpruo/
"Dunning-Kruger Effect"
-a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge.

Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue.

4X NE2 CHAMPION. 2020 TDRA NE2 Champion
 
Posts: 4138 | Location: United States of Texas | Registered: April 02, 2011Reply With QuoteReport This Post
DRR Sportsman
Picture of Matrix
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Ok so he just text me and said that he adjusted the valves cold. He got lucky. Pushrod wasn't bent but he's gonna replace it. The cup for the pushrod on the rocker arm was pretty beat up too.


Daryl Pinder

Dynasty Motorsports
www.dynastymotorsports.com


 
Posts: 456 | Location: Ft. Washington, MD USA | Registered: March 05, 2001Reply With QuoteReport This Post
DRR Elite
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no issue with adjusting them hot or cold. IMO, no reason to adjust them hot after the first time. adjusting them "cold" is safer and no mess
 
Posts: 13522 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR Pro
Picture of rusty
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adjusting cold is fine but must be tighter than hot setting.and i will add after setting them cold and checking hot and rechecking cold i have learned that all of them dont grow exactly the same.close enough though


honesty is the best policy,insanity is a better deffense
1.036, 6.16@ 224

 
Posts: 1438 | Location: texas | Registered: February 17, 2006Reply With QuoteReport This Post
DRR Top Comp
Picture of Curly1
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The first time I adjust them I do it hot to specs. Then I let it cool and check it again to get the cold specs. It is about .002 difference on my motor. Really does not matter if you do it hot or cold as long as you end up with right lash when it is hot.


https://postimg.cc/gallery/np3zpruo/
"Dunning-Kruger Effect"
-a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge.

Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue.

4X NE2 CHAMPION. 2020 TDRA NE2 Champion
 
Posts: 4138 | Location: United States of Texas | Registered: April 02, 2011Reply With QuoteReport This Post



DRR Sportsman
Picture of Matrix
posted Hide Post
He may not have checked them hot. Not sure. All he said was he checked them cold. We will see this coming weekend.


Daryl Pinder

Dynasty Motorsports
www.dynastymotorsports.com


 
Posts: 456 | Location: Ft. Washington, MD USA | Registered: March 05, 2001Reply With QuoteReport This Post
DRR Top Comp
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quote:
Originally posted by Matrix:
He may not have checked them hot. Not sure. All he said was he checked them cold. We will see this coming weekend.


Look on the bright side.

If it ever doesn't make the shift again, on time. Ya'll will now know the maintenance needed to make it up for the following round.
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
DRR Trophy
Picture of TheBlueTruck
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He needs to call Sheldon at T&D and get some spare rockers. And so do I lol


Regan Wilson Super Street 469C
 
Posts: 297 | Location: Tyler Texas | Registered: February 24, 2011Reply With QuoteReport This Post
DRR Sportsman
Picture of Matrix
posted Hide Post
quote:
Originally posted by Mike Rietow:
quote:
Originally posted by Matrix:
He may not have checked them hot. Not sure. All he said was he checked them cold. We will see this coming weekend.


Look on the bright side.

If it ever doesn't make the shift again, on time. Ya'll will now know the maintenance needed to make it up for the following round.


You got that right lol


Daryl Pinder

Dynasty Motorsports
www.dynastymotorsports.com


 
Posts: 456 | Location: Ft. Washington, MD USA | Registered: March 05, 2001Reply With QuoteReport This Post
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