Adjust Valve Lash (Diesel Engine - Solid Valve Lifters)

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After a fresh rebuild, I can finally adjust the Valve Lash on the rocker arm assembly of the Yanmar 3-cylinder diesel engine. For this, I will need to set each piston to "Top Dead Center" and make sure the gap between the rocker arm and the valve cap is set to the specifications of the Yanmar Service Manual.
Adjusting the valve lifters in this manner can be done to ANY solid lifter engine setup! (This is not the same as a hydraulic valve lifter!)
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4 июн 2022

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Комментарии : 35

@Matthew-sc1 2 года назад

Another helpful video for one of my engines. I never checked the valve lash on my tractor and maybe it's time to do that now! Thanks WR!!

@WorkshopRebuild 2 года назад

I'm glad you find this video helpful and hopefully you can check your valve lash on your tractor. It's important to do this every now and then to reduce engine wear in case the gap becomes bigger. -Andreas

@xyndijade2864 Год назад

THANK YOU THANK YOU THANK 1000 TIMES THANK YOU! I am a deisel mechanic, but i had never seen one of these until i bought a chinese tractor. Usually the no. 1 cylinder is at the front, hence my 3 day long confusion. I did what you said at the rear one, and BANG it fired right up! Thank you so much! I'd kiss you if i could!

@WorkshopRebuild Год назад

I am happy to hear that you were able to get your engine sorted out with help of this video. Thank you for your amazing comment!! Regards Andreas

@scottyscotty7785 3 месяца назад

Great video, clear and informative, thanks!

@WorkshopRebuild 3 месяца назад

Thanks! I‘m glad you found this video informative! Regards Andreas

@westhuesfabian Год назад

Very Food explaination buddy🙂

@WorkshopRebuild Год назад

I appreciate your feedback! Thanks a lot😃👍🏽

@rajbahadur2162 11 месяцев назад

Good video brother

@WorkshopRebuild 11 месяцев назад

Thank you for comment! I‘m glad you enjoyed this😎

@briant4162 Год назад

Thank you my friend dropped a push rod now we have to fix it

@WorkshopRebuild Год назад

Did you drop it before or after watching this video? Was your pushrod seated properly in the valve tappet and on the adjustment screw (rocker arm)?

@briant4162 Год назад

@@WorkshopRebuild his push rod is gone down in the oil pan I think don't know how it happened but it didn't come threw the valve cover

@WorkshopRebuild Год назад

I am really not sure how that is possible, because there is literally no area for the rod to drop down into the oil pan. the bottom of the pushrod must sit on the valve tappet and besides that, there is only little passageways for oil to trickle down into the oil pan. Let me know if you get an update from him, I'd be curious to know what happened! Regards Andreas

@briant4162 Год назад

@@WorkshopRebuild I'll let you know what happens

@whatsnextgarage 2 года назад

Good morning, I think I need a little more explanation. Top dead center is both valves shut and the piston fully extended at the top of the stroke. I’ve heard top dead center on the exhaust stroke vs compression stroke. Great video love the detail and btw your engine looks like a show piece! Perhaps I answered my own question 🤦.

@jasoncraig3752 2 года назад

Awesome video Andreas! Thanks for showing this! Could you do this on a flathead engine? Preferably the Kohler kt17.- Jason.

@WorkshopRebuild 2 года назад

This technique can be applied to almost any engine with solid valves lifters, so I really hope this will be beneficial for many viewers. The KT17 on the other hand does have a different setup and I actually still have one around that I could do a video on. I'll see what condition it is in and give you an update. Best regards -Andreas

@fabianschnitzker5224 3 дня назад

Hallo, I have a question. I am repairing a Yanmar 3D72-2b engine. I would like to know what the valve clearance is for this engine, please, and the sequence.

@dc-wp8oc Год назад

You seem to indicate that tightening the nut, closes the gap on the feeler gauge @7:10 - 7:20. It does not. The nut tightens to hold the adjusting bolt in place. It is the bolt, adjusted by the flat head screwdriver, that adjusts the gap. That is why you were not feeling any difference before and after "tightening" the nut.

@WorkshopRebuild Год назад

I am aware that with the adjusting bolt, you can raise and lower the gap on the rocker arm. Once you tighten the nut, you will secure the adjusting bolt to the rocker arm so it does not move. If you have ever set your valve lash before, you will know that each thread has a certain tolerance. As you tighten the nut you're actually lifting the adjusting bolt away from the push rod, which leads to a larger gap. To compensate for this tolerance you can turn the adjusting bolt and nut at the same time to achieve your desired valve lash. I hope this clarifies what I did in this video. Regards Andreas

@isaacperezR503 11 месяцев назад

One question, my brother, what is the oil pressure of the Yanmar 4TNV88 engine?

@WorkshopRebuild 11 месяцев назад

The specs for a 4TNV88 are between 20-55PSI. 55PSI should be at your highest rpm setting of your engine. At idle your oil pressure will be lower, but make sure it's not too low! I hope this helps. Cheers

@snm9878 7 месяцев назад

Do you know where I can get engine parts for a 3T75U yanmar 1610D tractor?

@WorkshopRebuild 7 месяцев назад

I've had great success sourcing parts through, Friday Parts. Check out their website to see what you can find: www.fridayparts.com/catalogsearch/result/?q=3t75u I hope this helps. Regards Andreas

@flyhigh8205 5 месяцев назад

Hello I need help setting the spill timing on my yanmar please help

@WorkshopRebuild 5 месяцев назад

You have to adjust everything to cyl. #1. (Closest to your Flywheel) Your injector (injection pump) must provide fuel about ~15degrees before TDC on the compression stroke. Some engines range between 12-18degrees, so 15 is right in the middle. I hope this helps. Cheers

@headpainter1 Год назад

Aren't diesels 4 stroke engines? Intake, compression, power then exhaust. Just no spark plug. You said set/ check valve lash then rotate engine 180 degrees then check again. Wouldn't it be on exhaust stroke at that point and valve under compression? Just trying to get it right in my head. Thanks alot.

@billklass7802 Год назад

Ever heard of a Detroit

@headpainter1 Год назад

@@billklass7802 amateur not that familiar with diesels. Just gas engines and trying to get the basic understanding of diesel principles.

@headpainter1 Год назад

Ok. Google is a wonderful thing. Evidently they make 2 and 4 stroke diesels. Interesting.

@renzo123123able 11 месяцев назад

he said 360 degrees so it would have done two strokes and either goes from compression to power or power to exhaust..so no pressure on the rockers

@isaacperezR503 Год назад

Good morning, I have a question. I am repairing a Yanmar 4TNV88-BSTX engine. I would like to know what the valve clearance is for this engine, please, and the sequence.

@WorkshopRebuild Год назад

Hello, the valve clearance on your 4TNV88 is: Intake: 0.006" - 0.010" Exhaust: 0.006" - 0.010" These must be set when the engine is cold and your first cylinder (NR.1) is closest to your flywheel. Here is more information on your engine if needed: tractorgearbox.com/yanmar_4tnv88_engine_specs.html Regards Andreas

@isaacperezR503 Год назад

@@WorkshopRebuild Thank you very much for the answer you have helped me a lot I appreciate it blessings