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Valve clearances
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Topic: Valve clearances (Read 1216 times)
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DavidHill
Senior Member
Posts: 142
Valve clearances
«
on:
04 September, 2023, 04:21:57 PM »
As my engine has now done 747km's since its rebuild, i think its time to check the clearances. Can anyone provide a step by step guide to setting the valve clearances on an Aprilia please?
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Sliding Pillar
Permanent resident
Posts: 1725
Re: Valve clearances
«
Reply #1 on:
04 September, 2023, 07:45:52 PM »
The LMC library has lots of technical and service data for the Aprilia.
Setting is 0.25mm with a hot engine.
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1955 Aurelia
1961 Lamborghini
davidwheeler
Permanent resident
Posts: 1485
Re: Valve clearances
«
Reply #2 on:
05 September, 2023, 12:50:45 PM »
Basically, you take off the cam cover and rotate the engine with the starting handle so that each cam follower in turn comes onto the back of the cam, opposite the lobe. You then measure the clearance where you can - the outer valves you can measure between the rocker and the stem of the valve, the inner ones you cannor get at the valve itself so have to measure between the rocker and the push rod. A little tedious but not difficult. If the gap is wrong, slacken the lock nut and adjust the tappet screw with a screwdriver until the gap is right, tighten the lock nut again and re-check the clearance.
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David Wheeler. Lambdas, Aprilia, Fulvia Sport.(formerly Appia and Thema as well).
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