02-27-2010, 08:09 AM | #1 |
Six in a row makes it go...
Join Date: Mar 2009
Location: Vacationland: Maine
Posts: 1,346
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HEI thrust washer?
I have some HEI distributors that have a thrust washer between the gear and the housing. Some don't.
Anybody know the deal with that? Is it required? Where can you get them?
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02-27-2010, 10:02 AM | #2 |
sharp as a marble
Join Date: Jan 2007
Location: atlantic beach,florida
Posts: 1,082
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Re: HEI thrust washer?
the washer/shim was there to take end clearance away. When the dizzy is spinning, the shaft wants to walk up, or out of the housing. the shim keeps everything in it's proper place.
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02-27-2010, 11:03 AM | #3 |
20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,725
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Re: HEI thrust washer?
A long time ago (pre-HEI) I picked up a few distributor thrust washers at a Chevy dealership. Can't recall if there were different thicknesses...
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02-27-2010, 11:27 AM | #4 |
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Location: Centrally located between Houston, Austin and Waco. BCS area.
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Re: HEI thrust washer?
Good pics on this site and scroll down for info on thrust washers and clearance..
http://www.rustpuppy.org/ignition2/Ignition%202b.htm Also you could check with Napa to see if they have a rebuild kit or a package of shims. Chevy dealers should have them also. Last edited by 68gmsee; 02-27-2010 at 11:27 AM. |
02-27-2010, 01:00 PM | #5 |
Six in a row makes it go...
Join Date: Mar 2009
Location: Vacationland: Maine
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Re: HEI thrust washer?
You guys are the best. I knew I'd get a good answer here...
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67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
02-27-2010, 01:21 PM | #6 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: HEI thrust washer?
Actually the cam rotation pulls downward on the distributor gear. The main reason to keep the space shimmed to a minimum is to avoid timing variations upon decceleration. When the RPM drops the distributor gear would tend to "float" if there was too much space.
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