Mike:
I am not sure how you are making the adjustment, but if you are
not moving the gear *underneath* the distributor, you are wasting your
time. Forgive me if I repeat what you already knew.
You will need to remove the distributor (one bolt), and then
remove the adapter bolted to the block underneath the base of the
distributor (two bolts). After you do this, look down in the hole, and
you will see a gear about the size of a half-dollar(?). You can use a
magnet to CAREFULLY lift this gear, noting the orientation of the slot
in the top of the gear. The gear is helically cut, so it will rotate as
you lift it clear of it's hole and the camshaft.
Once you have it clear, you can rotate it one tooth in the
direction you wish to move the distributor, and then lower it back into
the hole to mesh with the camshaft (it will rotate as you lower it back
in). It may not drop down all the way because it also needs to mesh with
the oil pump drive spindle which is underneath the gear. If this occurs,
you can rotate the crankshaft which will rotate the cam which will
rotate the gear until it mates with the oil pump and slips down into the
correct position. You can then reinstall the adapter, and then reinstall
the disti while rotating the rotor until it drops down fully into
position. Note that the slot in the top of the gear is what the
distributor mates with. This slot is NOT symmetric, so the distributor
will only fit into the gear one way.
I hope that was clear. I got confused while writing it, and I
have done it before...
Cheers,
Vance
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
Behalf Of michael lunsford
Sent: Wednesday, January 21, 2004 3:45 PM
To: 6pack@autox.team.net
Subject: Adjusting Tach drive on Distributor
For the past several days I have been trying to adjust the tach drive
pickup point on my distributor to orient it more toward the firewall and
less toward the front of the car. The reason is/was to reduce the angle
and tension on the tach cable when I advance the timing. I have had the
distributor and the cam drive gear out 5 or 6 times and don't seem to be
making any progress. I moved it counter clockwise about 10 degrees (or
so I thought) and it wouldn't start even though I adjusted it through
the whole range available for adjustment. The last time I moved it
clockwise to counteract the previously mentioned counter clockwise
adjustment and had to advance the distributor even further toward the
front of the car than it was before I started this exersize in futility.
Can someone suggest a simple method to accomplish my objective or should
I just get a longer tach cable? All help is greatly appreciated. TIA.
Mike Lunsford, 1970 TR6
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