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8V TECH: Valve Adjust How-To

What are the clearances supposed to be for the AC motor? My dealer reckons they are still 0.10 and 0.15,but I am sure I have seen somewhere that this has changed to 0.15 and 0.20.Slightly confused over this.
 
pete roper said:
mojohand said:
"A tappy tappet is a happy tappet," as they say :)

Unfortunately Mojo in the case of the new motor, especially the A5 this isn't the case. The cams, for a 4V are very radical. They also have very short, if any, quietening ramps. set the clearances too large and you risk the tappets hammering the flanks of the cam to buggery. With the 8V quiet is good. Noisy is bad!!!!

Pete

Oh dear. Mine's a bit clattery which I took to be 'a good thing'.

Obviously you don't want them too quiet either or the valves might not be closing fully. How should they sound on tickover when corectly set (cold engine)? You can definately hear mine!
 
Vince C said:
Oh dear. Mine's a bit clattery which I took to be 'a good thing'.

Obviously you don't want them too quiet either or the valves might not be closing fully. How should they sound on tickover when corectly set (cold engine)? You can definately hear mine!

If all you are hearing is light ticking you're probably fine. If your engine is an A5 then be aware that these are sometimes very noisy and it isn't tappet noise but the cams knocking about in the camboxes. When the engine designation changed to A8 they started shimming the camshafts for end float.

My very early A5 motored Griso makes a horrible racket! You certainly can't hear the valves because the whole top end makes a noise like a cement mixer full of bricks with a cockatoo screeching next to it. It refuses to go wrong though!

Pete
 
Many thanks Pete. It is just a tappety tappety light clatter even when cold.

What's the difference between A5 and A8 engine? I don't know which mine is, but it's a UK bike, 2009 Griso 8V. I bought it 2 months ago with just 1070 miles on it. Changed the oil (synth 10/60) and filter, and wondering if I should check the valve clearances as well?

Cheers

Vince
 
My '12 Griso has an A8, but with rollers. A fellow Griso owner with an older 8V says mine makes more valve noise, though clearances are correct. Not worried about it, just curious.

Anyone know if the change in tappets made a noise difference?
 
Mine's an A5, with quite noisy top ends. Sometimes I think I can hear a 'zizz' noise on revving the engine, as well (when standing next to it). Seems to be at one RPM, so it passes through the 'zizz' zone on the way up the rev band, and again on the way down.
 
Probably a stupid question but are the clearances the same on a roller rocker motor than on a early 8V.. I just about to do mine for the first time and dont want to muck it up... Thanks Jim
 
Realized that roller tappets wouldnt make any differance in the settings so went ahead and did the adjustment.. I had my valves adjusted at it first service by the dealer at 900 miles and now at 7k miles all but two exhaust were on the loose side...Very easy from start to finish and the only thing I did different from Pete's instructions was the removal of the plug caps by using a ziptie under the cap and pulling up to pop cap off..
 
Just catching this… and you are correct. No differences in lash clearances between either version.
 
What are the clearances supposed to be for the AC motor? My dealer reckons they are still 0.10 and 0.15,but I am sure I have seen somewhere that this has changed to 0.15 and 0.20.Slightly confused over this.

Guys I have the same question. Mine is a 2008 Stelvio with 25,000 Km.
 
Hi, thank you for this giude.

I have a griso 1100, and I know that the procedure is almost the same.

But there are some details that make me feel a little bit insecure anytime I had to check/adjust valves.

I notice that the term "CLOCKWISE" is spelled in capital letters, so I suppose that this is an important aspect.

I wonder, for my Griso 1100 the right sense of rotation is still clockwise?

In general, what could be the problem rotating the crank shaft in the wrong direction.

I remember that I saw, somewhere, about other Guzzi, that the crank must be rotated anti-clockwise, and this lead me to confusion, because I believe that all the guzzi v engine, rotate in the same direction.

Furthermore, I had a bad experience with a register nut on a suzuki several years ago, and from that time I feel much more secure if I can use a torque wrench also for the register nut. On the manual it seems that the torque spec for this nut is 8-11Nm do you believe it is a correct value?

And finally, on the spark plug thread, copper based anti seize could be the a viable alternative to nickel coat or silver based anti seize?
 
Yes, Turn clockwise. I don't know of any where you turn counter clockwise. I don't use a torque wrench for such low values. Wrench art works best, just need to snug the nut so the adjuster doesn't move. I don't think it matters which type of anti seize compound you use. Just don't over apply.
 
Anti seize not required on modern day plugs. If he plug thread is silver you are good. It has an anti seize coating. NGK actually warns against its use as the chances of over torquing increases.

While turning anti clockwise most likely not hit exact TDC. It causes slack in the cam chain. Need to go CW only. If you miss TDC go around again. Don't go backwards.

Even if I wanted to use a torque wrench on the nut it would be difficult. You want to hold the adjuster and tighten at the same time or you will forever be chasing your tail to get the right gap.
 
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