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plug gaps & DIY Valve Adjustment

Richard E Blauvelt wrote:-
>Does the +0.004" actually mean "plus or minus", or are they
>saying that the gap should be between 0.028" and 0.032"?

Yes, it means between 0.028" and 0.032".

>what are the effects of setting too small a gap?

too small a gap = too small a spark = incomplete combustion
too large a gap = no spark! or inconsistant spark.

>Only then did it occur
>to me that I had not thought in advance about how I would
>turn the engine to get each set of valves in the proper
>position for adjustment.

I always put a hex socket on the alternator spindle bolt and turn it
while pressing down on the belt to prevent slippage. (no I havn't
broken any belts yet!). This works nicely for a 4 cylinder engine,
I don't know how well it would work on a 6 with it's increased
internal friction.

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Stuart Metcalfe                      email [email protected]
Daresbury Laboratory                 phone 925 603521
Warrington                           fax   925 603416
Cheshire
England                              '95 318iS coupe
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