Author Topic: Distributor cap- centre ignition post melted!  (Read 2330 times)

chazchuzzlewitt

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  • Location: London, UK
Distributor cap- centre ignition post melted!
« on: 20 July 2006, 03:53 PM »
Was doing routine checking of my ignition/spark plug wires and I took the boot off the wire from the ignition coil and the centre post had burnt/melted almost all the way 'round and disintergrated into white powdery dust! Luckily I had a spare dizzy cap- any guesses to the cause of this?
1980 W116 M110 280SE
1994 W124 OM606 E300D
----------------------------
1980 W116 M116 350SE-sold
1992 W124 M103 300E-sold

Nutz

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    • W123 Gassers
Re: Distributor cap- centre ignition post melted!
« Reply #1 on: 20 July 2006, 05:00 PM »
Does the inside of the cap have carbon tracking? Also maybe test the resistance of the distributor rotor to see if it's too high and replace.

chazchuzzlewitt

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  • Posts: 69
  • Location: London, UK
Re: Distributor cap- centre ignition post melted!
« Reply #2 on: 23 July 2006, 01:18 PM »
I'd recently had the cap off to clean all the contacts, as well as the rotor tip etc. and everything was in good condition, this is why I was suprised to see it had disintergrated. I'm thinking there must have been an electrical surge of some kind causing the damage.
1980 W116 M110 280SE
1994 W124 OM606 E300D
----------------------------
1980 W116 M116 350SE-sold
1992 W124 M103 300E-sold

Denis

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  • Location: Paris
Re: Distributor cap- centre ignition post melted!
« Reply #3 on: 24 July 2006, 12:04 AM »
Hi fellows

Another possibility is a crack or cracks that allowed major arcing and degradation of the distributor cap. I saw this many years ago on a 1960 Volkswagen.

Cheers

Denis

Paris, France