Cylinder head bolts / valve adjustment

I would say do it now and do your fluids if you have not changed them out.I do not have your specs for valve clearence and head torque.hopefully some else has them

The recommended time for head re-torque is 50 hrs, so if you don't know if that was done I'd sure do it now. As for the valve adjustment we found three valves out of adjustment, two VERY loose before starting the tractor for the first time. Like clutch adjustment these are things that should be standardized and easily repeatable at the factory but for some bizarre reason they are not.

There was a post on this very same subject a week or two ago, it should be easy enough to find.

It's under “Tractor operation and maintenance”, page two, March 16th. I tried but failed to link it.

#1 I would not reuse it.

#2 Break them loose and re-torque one at a time. If your manual does not show a sequence for torquing the bolts I would start at the center and work my way out, one on one side in front of center, then diagonally to one rear of center, etc.

#3 Nothing to remove, but you will have to watch the valves as you turn the engine to find TDC. Remember to pull the engine shutoff cable out and use something to hold it there. Being your first time I would highly suggest finding a competent mechanic friend to assist you.

Here's the torque sequence.

Here is the sequence for setting the valve for a 3 cylinder engine.

http://devonntractors.ca/Findi…..ngines.pdf

All 3 cylinder engines will follow the pattern for setting valves

Good Luck,

RayH

1. is the valve cover gasket re-useable?

 

If it has a rubber one like the Chang Chai engines in the DF's , then yes, if not then a replacement is needed.

 

Dave

  Here is a picture of adjusting the valves. There is a feeler gauge between the rocker and the top of the valve stem. Loosen the locking nut, adjust the valve lash, and re-tighten the nut. I do not know the specs for your engine. Mine is a Quanchai, not too many out there.

Edit: Now I know how to post pictures! Stay the hell away from my laptop with windows 7 and post from work on the XP.

Here is a larger picture. Sorry, I'm just now figuring this picture thing out.

I am unable to search the forums and the data I seek my have been lost in the periodic data dumps so I ask…..

What torque value would you use on the injector fuel line bolt (banjo bolt?)?

What torque value would you use on the two bolts holding the injector in place?

Thanks

Phil wrote:

“What torque value would you use on the injector fuel line bolt (banjo bolt?)?”

I think that's an 8mm, so 8-12 ft. lbs. It's not holding back any pressure so just snug will do.

What torque value would you use on the two bolts holding the injector in place?

I think those are 10mm, so 15-22 ft. lbs. If they are grade 8.8 or better then ~33 ft. lbs.

Hi Guys,

      Just curious question on how many guys found loose or bad torque on the head bolts when they did them. I remember when I did mine, I marked them before backing them off, (Had to use a cheater on the 1/2 breaker bar!), then when trying to re-torque, the mark was WAY loose compared to factory torque! Visions of a soon-to-be blown head gasket entered my mind and so I “checked” the rest without busting them loose which actually does nothing. I also didn't find any of the other common factory mistakes like the clutch either so maybe mine was meant for a factory worker and actually went thru QC. Ok, now I gotta go knock on some wood. Take care, Fido

Those bolts have to be busted loose before re-torquing.  If you simply check them you are ignoring years of heating/cooling, rust, paint, etc.

I recommend breaking them loose one at a time then re-torquing to avoid any possible shifting of the head.  Also do this in the proper tightening sequence for the heads.

RonJ

I have a YD Y385 T engine and lost the engine manual I found (through the Forum the correct torque for the heads but I don't Have the Valve clearance  I know it has to be in the area of .011 intake and .017 exhaust but not sure can someone help

They are in the engine operation manual, we have a replacement if you want to get one.Also if you call the shop we can help you with those settings

Tommy

Affordable Tractor Sales

“Your Jinma Parts Superstore”

http://www.affordabletractorsalesco.com

Thanks Tommy  I appreaciate the valve clearance specs and look forward to getting the manual from you