Royal Enfield Himalayan - Bringing the Piston to Compression Stroke | Top Dead Center TDC | Part 1
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- Опубліковано 22 сер 2024
- Hi
This is part before adjusting the clearance and for that we need to bring the piston to TDC top dead center in compression stroke.
Please remember to not miss this point. Always make sure the piston is at TDC in compression stroke before you start adjusting the valve clearance
There are many ways to do it, I stick to old school as well I have discussed how Royal Enfield describes it in the service manual along with other techniques used. Hope this doesnot get confusing.
Stick to the technique you feel most comfortable with.
Cheers :)
Part 3 - Valve Clearance Tappet Clearance setting | .08 to .10 mm intake | .23 to .25 Exhaust
• Royal Enfield Himalaya...
Bro, bring the piston to tdc, (remove the plugon LH engine cover and see the tdc mark)
turn one full turn 360° , it should be tdc in comp. stroke. To make sure, check both the valves, you can feel the play on both the valves. Adjust the tappets, intake 0.10, exhaust 0.25, both in mm. That's it.
Thanks mate yes now that is a good way to do it, i agree. An on most bikes the mark is good and visible. But I still prefer to check. And for illustration purposes as well. As you know, Engine comes at TDC twice, I want to be sure that I adjust clearance at TDC in compression stroke and not the second TDC that is just before intake after the exhaust. You would be surprised to know how many mechanics out there end up doing it in intake stroke :) the difference is marginal and one can feel the play in TDC just before intake, so I just like to be sure, but that being said, your way of doing is absolutely on the spot.
Cheers :)
instaBlaster.
One more way is to put a finger on the plug hole and feel the compression. That's pretty fool proof. That and what another person has commented below, with your screwdriver method should work..
It would've been good I'd you had shown the use of the feeler gauges. I always doubt whether I'm setting em right.
Great info though.
Thanks mate, yes, many ways it can be checked indeed
As for the feeler gauge use, here is the link to the second part
ua-cam.com/video/OLi-INbjlTM/v-deo.html
Pls do post a vedio regarding the chain n sprocket replacement of Himalayan
You might have to wait a bit long for that mate :D As the bike has only done about 13500 kms and I believe chain still has another 8 to 10000 kms of life left. But yes once I am there will surely post a vid on that too
Cheers :)
Please get a head strap Mount for camera. 😂 , ✌️
While metric gauges will not have 0.23mm in general , imperial gauges almost always have it ( 0.009" )
Hey mate. Camera remains an issue still but thanks to the info on metric and imperial gauges, I was not aware of that, have just gotten by adding like in the vid. But this will come in handy for sure ;) cheers and thanks again :)
Can you tell me the reason for doing this, how often it needs to be done and what are the benefits.
As a good practice if you are riding your bike hard and revving it to limit, check for these at 5 - 7000 kms. Normal usage - 10- 12000 kms will be ok. I believe RE too recommends 5000 kms. not sure though
The reason this needs to be checked is because as bike accumulates more and more kms there is wear and tear. The tappets are constantly hitting the top of valve stem and over a period of time that can cause some wear and tear at the tappet thus increasing and even decreasing the clearence, same for valve, both at top and bottom.
If the clearence is less then specification(or too tight), the valve is not properly closed while compression thus gasses leak out and you wont get proper cumbustion. When bike is cold, you would have starting/idling issues. Problem is worse when the engine gets hot while ride and heat expands valves, thus leading to poor performance, it would feel that engine is dragging. Knocking is also observed in some cases. Plus you run the risk of wearing out the valve and valve seats sooner then usual, as valve itself once expanded because of heat, is now hitting the seats with more meat :) I mean there are a lot of things are going wrong.
If clearence is more(or too loose), you would hear too much of engine clatter or tappet noise again followed by degraded performance plus more wear and tear again
Hope it helps
Cheers :)
At 8:11 I can see some oil between the top and cylinder. Is the gasket defect ? Or do you just have to tighten the screws ?
Good observation, have been keeping an eye on it. Fingers crossed, I hope it's not a gasket defect. That would be a bummer. For now it's just sweating a bit. Let's see
Cheers :)
Why those two parallel marking lines are there below T mark?
Hey mate, first one just after T is for TDC. Second one just before F is where the spark fires the AFR, cheers :)
On how much km u need to do this?
Hey mate,
first one was done at 1500 kms, and then at 13300 kms. But enfield recommends every 10000 kms. In my opinion + - 1000 kms are ok :)
Cheers :)
I think the service manual recommends 5k km intervals for the valve clearances. Check the service manual