In-car distributor bushing replacement
#2743959
02/17/20 02:03 PM
02/17/20 02:03 PM
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Joined: Jan 2003
Posts: 3,031 Erda, UT
67Charger
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,031
Erda, UT
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In an effort to chase down some horrendous spark scatter (~8°), I was checking the disrtibutor tang to drive fit (very good), drive gear to cam gear fit (normal), and drive shaft wear (not pretty). Old shaft had about .003 reduction in diameter. The bushing, however, has about .010 - .015 wear in the bore on the forward side. Right/left was decent.
I am going to R&R the bushing in the block I have a small diameter pilot bushing puller coming that will fit down the .460 bore, and I plan on cutting the hex off the old drive and using it as a driver. I keep hearing that the newer bushings dont have to be burnished. We'll see how it fits. If the puller can't get it, I'll use a grease packed tap to bite into it. I'll weld a nut to the back of the tap to allow me to hook a slde hammer to it. I've done this before on other bushings and it works well.
Any tips, tricks, or advice before I do this Wednesday night?
11.33 @ 118.46 on motor 10.75 @ 125.35 w/ a little spray Now, high Speed Open Road Racing - Silver State Classic Challenge, Nevada Open Road Challenge, Big Bend Open Road Race Rocky Mountain Race Week 2020, 2022 2.0, Sick Week 2023
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Re: In-car distributor bushing replacement
[Re: lewtot184]
#2744067
02/17/20 09:07 PM
02/17/20 09:07 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Like Pac said I'd try the collar first. If you do the bushing I'd freeze it overnight & when all done lightly snug the pump bolts/install the intergear/final torque pump bolts for a dead on hex alignment, more critical on a SB but I would do it
live every 24 hour block of time like it's your last day on earth
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Re: In-car distributor bushing replacement
[Re: RapidRobert]
#2744117
02/17/20 11:31 PM
02/17/20 11:31 PM
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Joined: Jan 2003
Posts: 3,031 Erda, UT
67Charger
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,031
Erda, UT
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I have run the collar in the past, before I went to crank trigger wheel. It only got it down to ≈4°. The bushing is definitely shot, it is worn to the point there is no chamfer left on the forward side of the top of the bore, but it is there on the other 270°. I'll put the collar back on when this is all done.
11.33 @ 118.46 on motor 10.75 @ 125.35 w/ a little spray Now, high Speed Open Road Racing - Silver State Classic Challenge, Nevada Open Road Challenge, Big Bend Open Road Race Rocky Mountain Race Week 2020, 2022 2.0, Sick Week 2023
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