Do you turn the crank clockwise or counterclockwise? - Yamaha Grizzly ATV Forum
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post #1 of 20 Old 04-11-2019, 11:13 AM Thread Starter
 
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Do you turn the crank clockwise or counterclockwise?

I have a 2013 550.


I am going to adjust the valves once the tools I order arrive.


I watched a couple videos on youtube and at least one of them said make sure you turn the crank clockwise.


I have a copy of a 2009 550 and 700 service manual. I have been told the manual applies for most things on the 2013. The manual reads that you are to turn it counter-clockwise.


I would tend to go with the service manual but just wanted to check since it is a 2009 manual.
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post #2 of 20 Old 04-11-2019, 11:47 AM
 
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Counterclockwise. Adjust intake valves to the loose side of spec range. They will tighten up when you put a lot of miles on.
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post #3 of 20 Old 04-11-2019, 05:27 PM
 
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With the spark plug out and in neutral it doesn't matter.
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post #4 of 20 Old 04-11-2019, 07:43 PM
 
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Quote:
Originally Posted by reogem View Post
With the spark plug out and in neutral it doesn't matter.
Yeah exactly, turning it over either way from the camshaft sprocket without the spark plug in and in neutral (recommended) doesn't matter what way you turn it over, with spark plug in (not recommended) then only anticlockwise as the Yamaha manual suggests and if turning it over from the crankshaft then only turn clockwise, all to do with not putting any undue pressure on the cam chain tensioner.

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post #5 of 20 Old 04-11-2019, 08:27 PM Thread Starter
 
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Quote:
Originally Posted by Chuggy500 View Post
Yeah exactly, turning it over either way from the camshaft sprocket without the spark plug in and in neutral (recommended) doesn't matter what way you turn it over, with spark plug in (not recommended) then only anticlockwise as the Yamaha manual suggests and if turning it over from the crankshaft then only turn clockwise, all to do with not putting any undue pressure on the cam chain tensioner.

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The manual states counterclockwise from the crankshaft with the plug out.....it mentions nothing about turning the camshaft
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post #6 of 20 Old 04-11-2019, 08:56 PM
 
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Do you turn the crank clockwise or counterclockwise?

Quote:
Originally Posted by s4bill View Post
The manual states counterclockwise from the crankshaft with the plug out.....it mentions nothing about turning the camshaft
Yeah if turning it over from the crankshaft then definitely do it as the manual states but usually when only adjusting the valves it is easier to just turn it over from the camshaft sprocket with the spark plug out, (don't have to remove your primary drive cover this way) to turn it over from the camshaft sprocket just remove the camshaft sprocket cover and it's easily done, just don't forget to remove the spark plug though so your crankshaft can rotate easily


Edit, after re-reading your initial post there definitely is a discrepancy there! The only way you should be turning it over from the crankshaft is clockwise, and crankshaft counterclockwise if turning over from camshaft, you donít really want the cam chain pulled tight against the tensioner which happens when you turn your engine over backwards from the crank.

thinking about it I just realized that Iím looking at the crankshaft from the primary drive side, Yamaha are looking from the stator (LH) side so Manuel is all good, no discrepancy!

Last edited by Chuggy500; 04-11-2019 at 09:39 PM.
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post #7 of 20 Old 04-12-2019, 05:34 AM
 
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Just pull the plug... put the tranny in neutral.. turn it either way by the crankshaft.

However the manual does say counterclockwise. That is as you are facing the flywheel and cam cover side.
Don't try turning by the cam gear.

Use the timing mark on the flywheel (rotor) plus the timing marks on the cam gear/head casting.

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post #8 of 20 Old 04-12-2019, 08:48 AM
 
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Quote:
Originally Posted by reogem View Post
Just pull the plug... put the tranny in neutral.. turn it either way by the crankshaft.

However the manual does say counterclockwise. That is as you are facing the flywheel and cam cover side.
Don't try turning by the cam gear.

Use the timing mark on the flywheel (rotor) plus the timing marks on the cam gear/head casting.

Actually you never want to turn a 4 stroke, chain drive camshaft engine backwards. The chain will want to lift off the cam sprockets and can jump a tooth on the cam/cams depending on how tight the cam chain tensioner is. I have adjust a fair amount of 4 stroke twin cam valves on dirt bikes and you can tell in a hurry the cam chain wants to lift off the cam sprockets if rolling the engine over backwards. There is a video on Youtube someplace that shows what happens if rolling the engine over backwards. You always want to rotate the engine in the direction it runs.
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post #9 of 20 Old 04-12-2019, 09:39 AM
 
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I really can't see that happening when manually turning the engine, the forces and speeds involved are just way too small.

The tensioner takes the slack out. When turning by hand the crank shaft gear pulls any additional slack out of the chain no matter which direction it is turned. Slack is a problem when the engine is running as the crankshaft can over run the speed of the cam shaft.

If your timing chain is that loose adjust it... if it is that worn you should replace it.
I've adjusted the valves on my 2013 700 with well over 20,000 miles on it many times and have rotated the crank both direction. Mostly because the rotor sometimes rotates the shaft beyond the timing marks.

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post #10 of 20 Old 04-12-2019, 10:05 AM Thread Starter
 
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Quote:
Originally Posted by Zrt1200 View Post
Actually you never want to turn a 4 stroke, chain drive camshaft engine backwards. The chain will want to lift off the cam sprockets and can jump a tooth on the cam/cams depending on how tight the cam chain tensioner is. I have adjust a fair amount of 4 stroke twin cam valves on dirt bikes and you can tell in a hurry the cam chain wants to lift off the cam sprockets if rolling the engine over backwards. There is a video on Youtube someplace that shows what happens if rolling the engine over backwards. You always want to rotate the engine in the direction it runs.

If you are facing the crankshaft with the cover off, you have a socket on the crankshaft, and turn it counterclockwise, are you turning with the actual direction of the engine?
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post #11 of 20 Old 04-12-2019, 10:09 AM
 
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Quote:
Originally Posted by s4bill View Post
If you are facing the crankshaft with the cover off, you have a socket on the crankshaft, and turn it counterclockwise, are you turning with the actual direction of the engine?
Yes.

It would be a good idea for you get a factory service manual 15 bucks at tradebit.com
You will need it in the future.

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post #12 of 20 Old 04-12-2019, 10:48 AM
 
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When I adjusted my valves I turned the engine both directions, and never even bothered removing the spark plug.

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post #13 of 20 Old 04-12-2019, 01:28 PM Thread Starter
 
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Quote:
Originally Posted by reogem View Post
Yes.

It would be a good idea for you get a factory service manual 15 bucks at tradebit.com
You will need it in the future.

I completely agree. However, I already have the 2009 service manual. I did go to this website and many of the manuals state 2009-2013. I guess there could be some updates since 2009 and they list it in the newer version. I dont know. I will probably end up getting one. I would be a little pissed if I bought it and it is the same thing I have.
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post #14 of 20 Old 04-12-2019, 01:49 PM
 
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Great, only a few changes between the 9 and 13.

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post #15 of 20 Old 04-12-2019, 02:25 PM Thread Starter
 
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Quote:
Originally Posted by reogem View Post
Great, only a few changes between the 9 and 13.

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Do you have any idea what these minor changes are?
Is it something in the drivetrain that I need to consider when using the manual?
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