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tasb
The Distributor Distributor
Joined: April 27, 2002
Posts: 6371
Location: Pentwater, Michigan
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 Posted: Tue Mar 19, 2019 9:39 am Post subject: Re: Distributor cap popping off |
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You can bend the cap clips with needle nose pliers
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1957 Kombi low mileage 36 hp governor equipped M 178 Slow Drag Winner 2014, 2015, 2018
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chrisflstf
Samba Member
Joined: February 10, 2004
Posts: 3446
Location: San Diego
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| Posted: Tue Mar 19, 2019 10:28 am Post subject: Re: Distributor cap popping off |
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| A friends car had an issue with blowing rotors and caps. It was the brass gear that was bad |
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DorianL
Samba Member
Joined: June 06, 2013
Posts: 717
Location: Belgium
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| Posted: Tue Mar 19, 2019 12:18 pm Post subject: Re: Distributor cap popping off |
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| chrisflstf wrote: |
| A friends car had an issue with blowing rotors and caps. It was the brass gear that was bad |
As soon as I get my Ghighi back, I’ll check that out. |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Tue Mar 19, 2019 5:43 pm Post subject: Re: Distributor cap popping off |
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The most common cause of this is a points replacement device, which the mfgs don't tell you REQUIRE THAT YOU SHORTEN THE ROTOR BOTTOM TO CLEAR THE MAGNET WHEEL.
If you don't do this, the rotor sits too high and the cap can never fully seat, and parts break.
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 76947
Location: Sneaking up behind you
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| Posted: Tue Mar 19, 2019 5:44 pm Post subject: Re: Distributor cap popping off |
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| [email protected] wrote: |
The most common cause of this is a points replacement device, which the mfgs don't tell you REQUIRE THAT YOU SHORTEN THE ROTOR BOTTOM TO CLEAR THE MAGNET WHEEL.
If you don't do this, the rotor sits too high and the cap can never fully seat, and parts break. |
cough... Pertronix... cough, cough.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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dennismcd707
Samba Member
Joined: October 09, 2017
Posts: 517
Location: Burbs of Detroit
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| Posted: Wed Mar 20, 2019 8:02 am Post subject: Re: Distributor cap popping off |
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| [email protected] wrote: |
The most common cause of this is a points replacement device, which the mfgs don't tell you REQUIRE THAT YOU SHORTEN THE ROTOR BOTTOM TO CLEAR THE MAGNET WHEEL.
If you don't do this, the rotor sits too high and the cap can never fully seat, and parts break. |
Because I have a Pertronix distributor, I've been following this thread closely.
John, is the remedy for this taking the rotor to a grinder and grinding material away from the bottom, thus making the rotor "shorter"?
Sounds like everybody with a new Chinese Pertronix should do this?
Should I expect other problems with this dizzy too? 
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Wed Mar 20, 2019 9:26 am Post subject: Re: Distributor cap popping off |
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yes, shorten the bottom of the rotor until you have a slight gap between the rotor and magnet wheel.
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It's just advice, do whatever you want with it!
Please do NOT send me Private Messages through the Samba PM System (I will not see them). Send me an e-mail to john at aircooled dot net
"Like" our Facebook page at
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DorianL
Samba Member
Joined: June 06, 2013
Posts: 717
Location: Belgium
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| Posted: Wed Mar 20, 2019 1:53 pm Post subject: Re: Distributor cap popping off |
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BINGO !!!!
Rotor not fully seated and a Pertronix magnet-wheel-thingy under it.
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DorianL
Samba Member
Joined: June 06, 2013
Posts: 717
Location: Belgium
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| Posted: Wed Mar 20, 2019 1:54 pm Post subject: Re: Distributor cap popping off |
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| Thank you all for your precious input!!! |
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