John,
To clarify, you mean two TDC's per cylinder, per firing. While one
cylinder is at TDC starting to fire, a second is exhausting and starting
the intake cycle. Half a turn later of the crank (180 degrees), a third
cylinder is at TDC starting to fire, while a fourth is exhausting and
starting the intake cycle. So, only two TDC's per crank revolution that
are on their compression stroke. So, two opposing areas on the
flywheel's ring gear that get worn. Got it!
So my question is, the next time you replace the clutch, can you
dismount the flywheel, turn it 90 degrees, remount thereby getting
"fresh" teeth for this stopping area?
Fred - So.SF
SF BADROC
_______________________ Reply Separator _________________________
>Subject: Re: starter problem?
>Author: "John F Sandhoff" <sandhoff@compctr.ccs.csus.edu>
>Date: 10/5/99 2:21 PM
>
>Dan asks:
>> In about the last month, about 1 of every 20 or so starts, the
>> starter has started to ^@&#%&!, like when some moron hits the
>> starter when the engine's already idling...
>
>Most likely, there's a worn patch of gear teeth on the flywheel's ring
>gear. They've now worn down enough that the starter is 'almost' able to
>engage them, and you're hearing the process of finishing the job of
>grinding the teeth into dust :-)
>
>When the engine stops, it usually stops in one of 2 distinct positions
>(only one, if the compression isn't balanced). The engine will stop as
>a cylinder comes up on its compression stroke, as that's where it
>meets the most resistance. Two TDC's per crank revolution, and
>it'll stop just short of TDC (maybe even back up just a bit). So the
>starter is always hitting the same small patch of just a few gear
>teeth. After a long while, the three teeth you need are ground down
>while the rest of the ring gear is perfectly fine.
>
>-- John
>John F Sandhoff sandhoff@csus.edu Sacramento, CA
>
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