Peter,
The bolt threads into the spark plug hole, hence it contacts the piston on
its upward stroke (no direct contact with the crank).
The crank is symmetrical. The center point of the con rods, where they
attach to the crank, turn in a perfect circle.
I second Dick's opinion. Great way to find TDC with the head on. To bad
you still have to take it off to fit a new cam.
Peter
'68 TR250
on 5/8/02 3:31 PM, Peter Zaborski at peterz@merak.com wrote:
>> From: Navarrette, Vance [mailto:vance.navarrette@intel.com]
>> Sent: Wednesday, May 08, 2002 8:30 AM
>>
>> 5. TDC will be exactly halfway between the two marks you made.
>
> Hi Vance, this sounds like a great technique. However, I have a couple of
> questions that perhaps you or someone else on the list can answer...
>
> 1. What part of the crank is the bolt contacting in this scenario?
> 2. And is the crank symmetrical at this point (so that the mid point of the
> two contact locations is actually at the center?
>
> You can probably tell I've never had an engine apart (and you'd be right to
> think so) :-)
>
> Peter Zaborski CF58310UO
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