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April 6, 2011
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vo2et
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| Lifetime Member | posts 12 | |
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Hi all,
I have a 2008 Foton TE254 with 300 hrs on it. Is it important to do the cylinder head bolt torqe check and valve adjustment? if so when and how? thanks. I have a Laidong 1.5 litre 3 cyl 25 hp engine. 
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April 6, 2011
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DavidPrivett
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| Lifetime Member | posts 33 | |
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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
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April 6, 2011
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Tinbender
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| Lifetime Member Elite | posts 385 | |
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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.
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April 6, 2011
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vo2et
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| Lifetime Member | posts 12 | |
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Thanks for the advice, I have the specs for the valves and head bolts, so I guess its time to have a look inside. Any advice on the process for valve adjustment or head bolt torqueing? It will be my first go at it.
Thanks 
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April 6, 2011
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Tinbender
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| Lifetime Member Elite | posts 385 | |
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There was a post on this very same subject a week or two ago, it should be easy enough to find.
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April 6, 2011
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vo2et
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| Lifetime Member | posts 12 | |
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thanks Tinbender i'll check it out
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April 6, 2011
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Tinbender
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| Lifetime Member Elite | posts 385 | |
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It's under "Tractor operation and maintenance", page two, March 16th. I tried but failed to link it.
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April 6, 2011
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vo2et
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| Lifetime Member | posts 12 | |
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Ive reviewed the posting, thanks.
Ive got a couple of questions about my Laidong KM385BT engine.
1. is the valve cover gasket re-useable?
2. do you remove the cyl head bolts and reinstall and then torque, or just click them as is?
3. is there anything to remove to check the valve clearances?
thanks guys, this info is very helpful to a newbie.
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April 6, 2011
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Tinbender
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| Lifetime Member Elite | posts 385 | |
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#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.
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April 6, 2011
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Bert
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| Lifetime Member Expert | posts 105 | |
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Here's the torque sequence. 
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April 7, 2011
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RayH
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| Lifetime Member | posts 9 | |
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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
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April 7, 2011
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davoth
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| Lifetime Member | posts 7 | |
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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
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April 7, 2011
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vo2et
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| Lifetime Member | posts 12 | |
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i just spoke to Ken at JDB Equipment in Ontario Canada (our Canadian distributor for Jinma and Foton) and he tells me the gasket on the valve cover is rubber and reuseable. I have read the posted instructions for valve setting and the job does seem to be a little more straight forward now.
Does anyone have any info on the actual gap that is being measured on the valves, any photos?
Thanks again to all of you for this….this forum is really informative.
Darryl
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April 7, 2011
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vo2et
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| Lifetime Member | posts 12 | |
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Post edited 11:08 am – April 7, 2011 by vo2et
In my maintenance manual for the Foton TE254 with the Laidong KM385BT 25hp the head torque check and valve clearance check is on the 100 hr maintenance interval.
I believe this differs from the Jinma which is at 50 hrs?
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April 7, 2011
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Tinbender
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| Lifetime Member Elite | posts 385 | |
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Post edited 12:05 pm – April 7, 2011 by Tinbender
 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.
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April 7, 2011
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Tinbender
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| Lifetime Member Elite | posts 385 | |
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Here is a larger picture. Sorry, I'm just now figuring this picture thing out.
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April 7, 2011
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vo2et
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| Lifetime Member | posts 12 | |
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Thanks Tinbender, thats the pic that I was lloking for. great :)
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