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Brian Vogel
Prolific User
Username: guyslp

Post Number: 113
Registered: 6-2009
Posted on Wednesday, 10 October, 2012 - 11:58 pm:   Edit PostDelete PostView Post/Check IP

Hello All,

This topic arose elsewhere, on rollsroyceforums.com, from someone trying to set the timing on his 20/25.

In this set of timing instructions, clearly a Crewe TSD scanned, in the TIMING - TO CHECK section step number two reads: Adjust the tappets of No. l cylinder to the flywheel marking clearance specified for the engine.

In the same step on the RROC-Australia Pre-War Library instructions it reads: Adjust the tappets of No. l cylinder to the running clearance specified for the engine.

Obviously, these can't both be correct. I'm presuming that all of the timing setup is done using the flywheel marking clearances and then everything is set back to the running clearances. If that's the case, the library version appears to have a major typo.

Can someone definitively clarify?

Brian
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Stephe Boddice
Frequent User
Username: stephe_boddice

Post Number: 86
Registered: 2-2005
Posted on Saturday, 13 October, 2012 - 08:15 am:   Edit PostDelete PostView Post/Check IP

I have responded to this on the US site but to clarify for this posting : -

The first reference relates to setting the valve timing when assembling the engine. (See TSD2022)

The second reference relates to setting the ignition timing during normal servicing. (See TSD2066)

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