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Author Topic: Aprilia tappet clearances  (Read 1417 times)
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welleyes
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« on: 12 November, 2011, 03:44:04 PM »

Can anyone give us the cold tappet clearances for an Aprilia engine?

Stuart Tallack pp Andrew Tallack
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ben
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« Reply #1 on: 12 November, 2011, 05:22:23 PM »

Ten thou' (which is quarter of a turn on the adjusting screws from zero as they have a 1mm pitch thread)
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GG
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B20 s.2, Appia C10 unrestored


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« Reply #2 on: 12 November, 2011, 06:32:49 PM »

take a look here:

http://gallery.me.com/geoffreyg#100345&view=grid&bgcolor=black&sel=1
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B20 s.2, Appia C10 unrestored
welleyes
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« Reply #3 on: 12 November, 2011, 09:00:27 PM »

The "Bible" actually says 10 thou hot.

Stuart Tallack pp Andy Tallack
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ben
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« Reply #4 on: 12 November, 2011, 10:16:39 PM »

I hesitate to contradict the "Bible" but the factory data in the table cited by GG doesn't seem to say anything about the engine being hot.
I have always set mine at 10thou cold. Maybe they don't change much!
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welleyes
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« Reply #5 on: 12 November, 2011, 10:56:23 PM »

Thank you. Just what we wanted to know.
For "Bible" read English translation of the Italian manual. I presume it was issued with a new car as it is in English (translated by Italians?) and refers to tables and diagrams in the Italian language manual.
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Sliding Pillar
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« Reply #6 on: 13 November, 2011, 02:09:08 PM »

I always did mine HOT!
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lancialulu
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« Reply #7 on: 14 November, 2011, 11:32:42 AM »

Just rifling through my Aprilia files I have a data sheet that states HOT 10 thou.

I now know what to do when I start my first full Aprilia service. I assume this is every 5000 miles??

Tim
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Its not the winning but taking part! or is it taking apart?
1955 Aurelia B12
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