Valves clearance Vs. Engine type

[nitch]

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,
Best Regards
Liad

[types26/36]

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.

[nitch]

Thanks for the quick response.
Do you mean the engine's serial number? Mine is 25857, is it reasonable?
Liad

[types26/36]

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.

[rgh0]

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.

regards
Rohan