Valves clearance Vs. Engine type

PostPost by: nitch » Mon Jun 26, 2006 5:56 am

Hello,
According to the manual, on the "Technical Data" section, there are different valve clearance settings for engines before LP.9951 and after LP.9952.
Where should I look for the number? on the head or the block?
Thank You,
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PostPost by: types26/36 » Mon Jun 26, 2006 6:08 am

Look on the the block,engine number should be above the inlet side engine mounting. I have only seen the engine number stamped on the heads of early engines which were at the rear and hard to read.
I think Lotus stoped stamping the head but cant tell you at what number.
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PostPost by: nitch » Mon Jun 26, 2006 7:39 am

Thanks for the quick response.
Do you mean the engine's serial number? Mine is 25857, is it reasonable?
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PostPost by: types26/36 » Mon Jun 26, 2006 8:51 am

nitch wrote: Mine is 25857, is it reasonable?
Liad


That number sounds about right for a late car although there should be some code letters as well, IIRC Lotus produced slightly under thirty thousand T.C. engines.
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PostPost by: rgh0 » Mon Jun 26, 2006 11:04 am

The valve clearance differences between early and late differences related to a change of valve material and maybe also a change in cam clearance ramp design. Exactly from what to what is not documented anywhere to my knowledge.

If you have no better data than this I would use the later clearances for all engines these days.

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