Valve clearance US vs. EU models
#11
Valve clearance check
The intake average clearance was 0.155mm
The exhaust average clearance was 0.165mm
For comparison the specs of the European Fsport 2001-2003 or the US version is:
Intake 0.20+-0.03mm
exhaust 0.28+-0.03mm
I can tell they are all around the same clearance because the max difference was 0.05mm.
Also the clearance need to be bigger in time because of the friction "eating" the metal little by little. So it doesn't make any sense it would be 0.20+-0.03 in the first place.
So after checking it i still don't know where to find the service manual for the European model.
Any help guys?
Thank you for your comments.
#12
The clearances get closer over time as the valve seat and valves both wear from constantly crashing into each other.
Yours are tight, and need to be set looser going off US specs. Thats the normal way clearances work.
#13
I'm honestly not sure what your saying here. The specs are for new, perfectly machined valves and seats.
The clearances get closer over time as the valve seat and valves both wear from constantly crashing into each other.
Yours are tight, and need to be set looser going off US specs. Thats the normal way clearances work.
The clearances get closer over time as the valve seat and valves both wear from constantly crashing into each other.
Yours are tight, and need to be set looser going off US specs. Thats the normal way clearances work.
You're right it can be smaller,my mistake.
So how can you explain bigger clearances than 0.23mm? What is the mechanical situation going on there?
#14
#15
I attached the link below.
#16
boredandstroked is right.
The valve is sitting cold in the cylinderhead. The shims are directly on top of the valvestem. And over the shims is the valvelifter.
So if we do not take in account the less likely scenario's for example that the steel of the valve suddenly shrinks, I would assume that if the valve clearance is getting bigger the valves might be buisy sooting up. Or the cams wear, or the shims are getting flatter, or de top of the valvestem has a problem or the valve lifter is having issues.
The valve is sitting cold in the cylinderhead. The shims are directly on top of the valvestem. And over the shims is the valvelifter.
So if we do not take in account the less likely scenario's for example that the steel of the valve suddenly shrinks, I would assume that if the valve clearance is getting bigger the valves might be buisy sooting up. Or the cams wear, or the shims are getting flatter, or de top of the valvestem has a problem or the valve lifter is having issues.
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fryman
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06-05-2013 05:27 PM