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CC Advertisers
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03-25-2010, 10:01 PM
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CC Member
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Join Date: Dec 2000
Location: Avondale,
Pa
Cobra Make, Engine: Contemporary, Shelby Alum 427, Dove heads
Posts: 55
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Not Ranked
I have had the same problem with my MSD, no fire though. After a few hundred miles I thought I had blown a head gasket, the car was undriveable. Attached is a pic of the inside of the cap. I also had huge problems with corrosion of the distributor that MSD replaced under warranty. The new distributor is no better and started to rust right away. I spent a lot of time on the MSD forum and the problem seems to be very wide spread in the FE series. I even cut the side of an old cap to check the alignment of the rotor. MSD's suggestion was to drill two half inch holes in the cap even though it is vented, instead I remove the cap when the car is not being driven.
Get on the MSD forum and do a search for rust or corrosion and see what you find, I gave up on them.
I think there is a thread on this forum also, I am pretty sure that I have posted these photos before.
__________________
In school 90% is exceptional, in life 10% wrong is failure.
Last edited by edwhite7; 03-25-2010 at 10:25 PM..
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03-26-2010, 07:14 AM
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CC Member
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Join Date: Mar 2000
Location: Des Moines,
IA
Cobra Make, Engine: Sold my beloved Shelby CSX 4068, Gessford 427 Ford
Posts: 756
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Not Ranked
Quote:
Originally Posted by edwhite7
I have had the same problem with my MSD, no fire though. After a few hundred miles I thought I had blown a head gasket, the car was undriveable. Attached is a pic of the inside of the cap. I also had huge problems with corrosion of the distributor that MSD replaced under warranty. The new distributor is no better and started to rust right away. I spent a lot of time on the MSD forum and the problem seems to be very wide spread in the FE series. I even cut the side of an old cap to check the alignment of the rotor. MSD's suggestion was to drill two half inch holes in the cap even though it is vented, instead I remove the cap when the car is not being driven.
Get on the MSD forum and do a search for rust or corrosion and see what you find, I gave up on them.
I think there is a thread on this forum also, I am pretty sure that I have posted these photos before.
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Where is all the moisture coming from?
Is this limited to FE applications?
What about the small block guys - are you seeing similar corrosion?
__________________
CSX4068, '69 Bronco, '70 BOSS 302, '87 Mustang GT, '08 Roush Trak Pak
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03-26-2010, 09:03 AM
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CC Member
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Join Date: Jun 2009
Location: Boise, Idaho,
ID
Cobra Make, Engine: Contemporary Classics 427 SC, 427 sideoiler
Posts: 54
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Not Ranked
Rick and Pat are right about it being a Mallory dual point. I have subsequently changed it to an electronic unit.
The car had been running flawlessly up until this startup. No misses, stumbling or anything and it had never backfired thru the carb before. I had worked on the carb the day before and didn't get one fitting completely tightened.....my screwup.
The rotor looked fine to me. No noticable damage or signs of arcing.
Bob
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03-26-2010, 09:25 AM
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Banned
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Join Date: Oct 2003
Location: Yorba Linda,
CA
Cobra Make, Engine: SPF w/392CI stroker
Posts: 3,293
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Not Ranked
Quote:
Originally Posted by Rick Parker
That looks like a Mallory Cap.
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Quote:
Originally Posted by DougD
Where is all the moisture coming from?
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In pic #2 I see rust on other components ahead of the dizzy (neck to the expansion tank, etc.). I think there is something else here going on that is leading to excessive moisture beyond just the cap.
-Dean |
03-26-2010, 02:05 PM
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CC Member
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Join Date: Dec 2000
Location: Avondale,
Pa
Cobra Make, Engine: Contemporary, Shelby Alum 427, Dove heads
Posts: 55
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Not Ranked
Quote:
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In pic #2 I see rust on other components ahead of the dizzy (neck to the expansion tank, etc.). I think there is something else here going on that is leading to excessive moisture beyond just the cap.
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The other rust is local to those parts and lots of miles. MSD said the dist problem was due to an unvented cap and sent me a new center shaft and vented cap. These started to rust within a few weeks as can be seen in pic #1 with the cut away cap installed. They blame it on the MSD 6AL box with the hall effect ignition. They say it creates a large amount of Ozone that can't be vented through their vented cap. This is why they suggested that I drill additional holes in the cap. I think that the problem is made worse from the rotor being lower than the perimeter posts, seen in the cutaway. Does anybody else have dist shaft rusting problems?
__________________
In school 90% is exceptional, in life 10% wrong is failure.
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03-26-2010, 02:40 PM
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CC Member
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Join Date: Jul 2007
Location: Detroit Burbs,
MI
Cobra Make, Engine: Former owner of SPF#2632
Posts: 257
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Not Ranked
My MSD Cap failed after a few hundred miles...this was before I heard of the rotor contact not making contact with the carbon button. The button itself fell off but it did not disinegrate. When replaced I bent the rotor up and have not experienced any issues and have close to 5000 miles. I bend it up a few times a season to be on the safe side. I remember the arching did create a whole bunch of rust inside the cap.
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