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Join Date: Dec 2000
Location: The Hague, Netherlands
Posts: 806
distributor gear play

I discovered that my distributor has noticeable play. First thought was worn bushings, but on further checking it appears that the play is between distributor gear and the worm gear on the crankshaft. I worried that I might have the wrong size distributor gear (25.15mm), so I checked on a spare case (73) and crankshaft with three different distributors and they all show the same play. Is this considered normal???

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Peter
'13 981S
'73 911T
'05 996 4S cab, now gone
'70 911S Targa, now gone
Old 04-13-2014, 04:44 AM
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Location: NY
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The play usually comes from the fiber washer disintergrating, leaving just the metal shim washers.
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Ed
1973.5 T
Old 04-13-2014, 10:41 AM
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Quote:
Originally Posted by E Sully View Post
The play usually comes from the fiber washer disintergrating, leaving just the metal shim washers.
Thanks, but that would account for the up and down movement of the shaft which is not the problem here. Two of the three distributors i tried are recently rebuild and dont have excessive up-down movement.
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Peter
'13 981S
'73 911T
'05 996 4S cab, now gone
'70 911S Targa, now gone
Old 04-13-2014, 09:42 PM
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Location: Camarillo, Ca.
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Peter,

The early distributors have the smallest driven gear, so the scenario of a wrong gear and excessive play would not come into play.

Excessive play scenario would be 3.2 drive gear (@ crank) with a 2.0-2.7 driven gear (@ dizzy)

The fatal scenario would be 2.0-2.7 drive gear with a 3.2-3.6 driven gear. This would cause a failure of the drive gear on the crank.

The gear(s) on the crank is most likely worn or the play you are witnessing is normal.
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Aaron. F.S. 1965 Solex engine w carbs/cleaner
Burnham Performance
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Old 04-14-2014, 07:55 AM
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Aaron,

I guess you are right, as all gear if fairly new and shows the same behavior (tried combinations of two cases, three crankshafts and three distributors), we need to file this under "works as designed".

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Peter
'13 981S
'73 911T
'05 996 4S cab, now gone
'70 911S Targa, now gone
Old 04-15-2014, 03:55 AM
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