Author Topic: Ignition Point glazing  (Read 3289 times)

Jonny B

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Ignition Point glazing
« on: October 13, 2016, 02:36:26 »
I got a question from a good friend of mine regarding an interesting issue with a 280 SL:

"Hi, very nicely restored from Germany keeps glazing the points, no spark, has happened 3 times now, replaced points and condenser first time, since then, all have to do is scuff points with file..has proper resistor, did not actually check voltage at distributor..they are not wet, burned, discolored, nothing visual, just lose continuity, like usually happens if sat long time in damp conditions, but this in very short time..ideas??"

Any ideas out there? I did a full search using "glaze" and "Glazing" and got no hits.
Thanks
Jonny B
1967 250 SL Auto, DB 568
1970 280 SL Auto, DB 904
1966 Morris Mini Minor

Benz Dr.

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Re: Ignition Point glazing
« Reply #1 on: October 13, 2016, 03:35:52 »
Are you sure that grease isn't getting on them? Ordinary grease won't work on the rubbing block and it has to be Bosch distributor grease or similar because it will fly off and get on the points.
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
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1965  230SL
1967 250SL
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Jonny B

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Re: Ignition Point glazing
« Reply #2 on: October 13, 2016, 19:36:11 »
Do not know, I have sent the comment back to my friend in Ohio.
Jonny B
1967 250 SL Auto, DB 568
1970 280 SL Auto, DB 904
1966 Morris Mini Minor

Tyler S

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Re: Ignition Point glazing
« Reply #3 on: October 13, 2016, 21:25:08 »
Make sure his "File" isn't contaminated and transferring foreign material/oil over. Also a bad idea to use regular sandpaper as the glue in it also will contaminate the points.
1968 (67) 250sl. 4 speed manual. DB180 Silver
1955 220 Cabriolet A. White Grey
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1936 Ford PU Flathead V8. Creme on tan interior.
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ja17

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Re: Ignition Point glazing
« Reply #4 on: October 14, 2016, 07:17:25 »
Sometimes, a no longer functioning factory electronic ignition has been by-passed.  If this is the case, you would also need to change the ballast resistors and coil or else the ignition points will quickly fail. Make sure that the ignition coil, contacts and ballast resistors are matched-up correctly.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
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1963 404 Mercedes Unimog (Swedish Army)
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Jonny B

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Re: Ignition Point glazing
« Reply #5 on: October 14, 2016, 15:30:50 »
Continuing thanks the information has been sent along.

Joe - This is a contact with our mutual friend Ted Gottfried.
Jonny B
1967 250 SL Auto, DB 568
1970 280 SL Auto, DB 904
1966 Morris Mini Minor