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JINMA224XR · 03-06-2006, 10:13 PM

<font color="blue"> I have not re-torqued the headbolts, I do not know the best way to do it. Some of them appear to be under the main rocker-arm shaft. What is the best way to torque the headbolts? I would love to hear how you did it.

I Have not set the valve lash yet. How often should I do it?

Yes, I did adjust the high-speed set screw to get to 2650 RPM.
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Hey Dan,

Here is the discussion that we had on retorqing the Headbolts and adjusting the valve lash on the Y380T and Y385 engines. It is seven pages long and humorous at times. I followed JW Smith's method, compliments of Dick/Thingy, and I think that you will know how to retorque the headbolts and adjust your valves after you finish reading it. Keep in mind that it was a learning experience for me and the others, as we discussed the procedure. Also, you will also find out how to make MoonShine too, I suppose there was a lot of drinking going on during that discussion. [img]/forums/images/graemlins/smile.gif[/img] It really was a fun discussion no joke.

Here's the link:
http://nortrac.proboards26.com/index...ead=1107491554

The engine manual suggests checking and/or adjusting the valve lash every 100 hours. So I would do it as soon as possible for the durability of your engine. One person reported a very tight valve lash on his and mine were mostly within tolerance on the loose side, but were off quiet a bit, either from wear in on a new engine or from the initial setting at the factory.

I was wondering if the High Speed Adjustment screw, would actuall give a higher rpm. As I adjusted my high Speed screw a while back, but have not put the tractor to work, to see if the adjustment actually did raise the rpms. I only raise mine up about 100 to 150 rpms, if I did the adjustment correctly.

While you are at the owners forum, I envite you to join us and keep us all posted on how the engine is holding up.

Have a nice day,
Joe [img]/forums/images/graemlins/cool.gif[/img]

03-06-2006, 10:13 PM	#25 (permalink)
JINMA224XR Gold Member Join Date: Feb 2005 Location: Alabama Gulf Coast Posts: 448	Re: Jima Y385T powered Mazda Pickup <font color="blue"> I have not re-torqued the headbolts, I do not know the best way to do it. Some of them appear to be under the main rocker-arm shaft. What is the best way to torque the headbolts? I would love to hear how you did it. I Have not set the valve lash yet. How often should I do it? Yes, I did adjust the high-speed set screw to get to 2650 RPM. </font> Hey Dan, Here is the discussion that we had on retorqing the Headbolts and adjusting the valve lash on the Y380T and Y385 engines. It is seven pages long and humorous at times. I followed JW Smith's method, compliments of Dick/Thingy, and I think that you will know how to retorque the headbolts and adjust your valves after you finish reading it. Keep in mind that it was a learning experience for me and the others, as we discussed the procedure. Also, you will also find out how to make MoonShine too, I suppose there was a lot of drinking going on during that discussion. [img]/forums/images/graemlins/smile.gif[/img] It really was a fun discussion no joke. Here's the link: http://nortrac.proboards26.com/index...ead=1107491554 The engine manual suggests checking and/or adjusting the valve lash every 100 hours. So I would do it as soon as possible for the durability of your engine. One person reported a very tight valve lash on his and mine were mostly within tolerance on the loose side, but were off quiet a bit, either from wear in on a new engine or from the initial setting at the factory. I was wondering if the High Speed Adjustment screw, would actuall give a higher rpm. As I adjusted my high Speed screw a while back, but have not put the tractor to work, to see if the adjustment actually did raise the rpms. I only raise mine up about 100 to 150 rpms, if I did the adjustment correctly. While you are at the owners forum, I envite you to join us and keep us all posted on how the engine is holding up. Have a nice day, Joe [img]/forums/images/graemlins/cool.gif[/img]