Hi guys:

I have to do a valve adjustment in a B16A engine & I have a little problem.

One nut and its screw spins at the same time. I do not achieve to make the valve adjustment .

How I could make to them spin independently?

I hope my explanation to be enough.

Thanks and regards.

 

This tool makes valve adjustments a breeze. If the nut is seized on the adjuster, it may have been over tightened and have deformed/damaged threads. If anything seems fishy about it, replace it.

 

Thank you for your reply.
The tool looks good and practical. I will buy it.
If threads are damaged and If I have to replace screw. Is it easy? Do I have to unscrew simply? or Is it necessary to disassemble camshafts or more?
Could you help me please?
Regards.

 

You can try to use a flat head screw driver to hold the screw, and then use a 10 mm wrench to break the nut loose. If the nut will not break loose from the screw, then you can continue loosening both at the same time, until they completely come out together. You can then try to separate them, or just purchase a new screw and nut from Honda, and tighten them back down.

 

Thank you very much.
It seems very easy. I had believed that would be necessary to disassemble other parts, but your way is better ;-))
I will call to Honda this week to purchase the screw and nut to change the damaged.

 

Are you sure that adjusting screw can be extracted in counterclockwise sense? (green direction)
Attached you can see that the screw has a head with more thickness than thread diameter (Red detail). It seems that the correct sense to extract is in clockwise sense (red direction)
What do you think about this?
Thank you so much.

 

Ive never had the need to take one out before honestly, but it if wont "back out", then yes, you may have to screw it in and go forward.

So the nut wont break loose at all from the threaded adjuster, but the threaded adjuster spins freely?

 

Adjusting screw spins freely and nut is jammed.

 

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When you turn the nut counter clockwise, the screw should continue to turn, until the end that touches the valve stops on the rocker. This should then allow the nut to break loose from the screw. Then you can turn the screw clockwise to take it out.

 

OK. So I will have to disassemble the camshaft to extract the adjusting screw.
If I do not do it the valve head will not allow to extract the screw because the valve spring is doing upward force.

 

What he means is that since the adjuster wont back out of the rocker and gets tight due to the tip being larger, use this to your advantage. The adjuster should get tight as you try and back it out, when it does, keep using the socket and a ratchet on the adjuster nut so it will loosen from the adjuster. once the nut is off the adjuster, screw the adjuster back in and through and out the rocker arm. Hope that explains it ok...

 

Yes, I understand and i am going to do as you have explained.

I asked about to extract the adjusting screw ,because I am afraid if it has threads damaged. I expect that they will be fine, because it will be better for my.

Thanks.

 

It was solved. The screw has a head with the same diameter of the thread. If you spin this screw counter clockwise, its head achives the rocker and the screw stops. Then, if you continue spining, the nut starts to spin freely.
I have also purchased the valve adjustment tool. It works very well. It is really good for B series engines.

Thanks for your advices.