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#Post#: 288--------------------------------------------------
Valve clearance
DIR By: Danmt
Date: April 20, 2018, 1:06 pm
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Just finished checking the valve clearances on my 20000 km -05.
All front cylinder and rear cylinder inlet were good with zero
clearance. The r/h exhaust valve had crept upwards and created a
.06 mm clearance on the l/h valve. Adjusted it so both were zero
celarance.
It's a good design. Thanks to the hydraulic lifters, you will
never have too small clearances. If one valve wears into the
seat, it just creates a larger clearance on the adjacent valve.
Quite a lot to remove to get to the valves and not much space
for your hands. Still not too bad, though. The valve adjuster
screws are 4 mm square and the locking nut is 10 mm, the wrench
must be of the deep, i.e. cranked type.
#Post#: 314--------------------------------------------------
Re: Valve clearance
DIR By: omeo-mt01
Date: May 19, 2018, 10:22 pm
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--- Quote from: Danmt link ---
>
> Just finished checking the valve clearances on my 20000 km
-05. All front cylinder and rear cylinder inlet were good with
zero clearance. The r/h exhaust valve had crept upwards and
created a .06 mm clearance on the l/h valve. Adjusted it so both
were zero celarance.
> It's a good design. Thanks to the hydraulic lifters, you will
never have too small clearances. If one valve wears into the
seat, it just creates a larger clearance on the adjacent valve.
> Quite a lot to remove to get to the valves and not much space
for your hands. Still not too bad, though. The valve adjuster
screws are 4 mm square and the locking nut is 10 mm, the wrench
must be of the deep, i.e. cranked type.
>
--- End Quote ---
Hi Dan, I,m a bit concerned for you saying all set to zero
clearance but maybe its just the way you wrote it.
.04mm is the clearance for the adjustable valve on each
assembly.
The hydraulic one is zero.
cheers Graeme
#Post#: 315--------------------------------------------------
Re: Valve clearance
DIR By: Danmt
Date: May 19, 2018, 11:24 pm
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Nope.
Both valves share the same hydraulic lifter. Maximum difference
is 0.04 mm, but ideal is zero.
If one valve works its way up the seat it will reduce the valve
clearance on that valve. However, the hydraulic lifter
compensates for this and contracts slightly. This causes the
valve clearance on the other valve to increase. This you remedy
by adjusting the ...well, adjuster. If the clearance is on the
adjuster valve you screw it in, if it is the other valve, you
screw it out. The hydraulic lifter keeps the clearnce to zero on
the tightest valve.
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