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Roby466's Avatar
 
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Location: Halifax, Canada
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Leaking ignition coil

Hi,

I found the other day at the track that the ignition coil on my 1985 930 was leaking... I guess that it will eventually overheat and fail since the oil is supposed to keep everything kind of cool in there.

In search of a replacement, I fond the new one that Bosch makes in Brazil sold by our host for a modest price but I have read a lot of bad reviews for these.

I also found used original ones that seem a bit expensive and I am not sure how long it will last.

I have a MSD high vibration blaster coil from a complete MSD system that I had for my 911sc and I have read that the MSD coil could be used as direct replacement. What worries me is will using the MSD coil shorten the life of my original CDI?

Should I get the used original one? Anybody has one?

Thanks for the help

David
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David
1985 Black 930, K27 7006, Garretson Intercooler, Adj boost, TB: 23 - 31mm, bielstein sport shocks, ER polybronze bushings front and rear, ER monoball joints front and rear with offset camber plates, 935 X triangulated strut brace, raised spindles, racing bump steer kit
1981 Black 911sc (sold)
Old 07-01-2011, 02:00 PM
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hi,

So far the brazilian made Bosch I got from our host is still going strong since I got it Nov 2009 from our host. But my car is not a daily driver. I use it at least twice a week for 30 min drive around town.


tdh888
Old 07-01-2011, 03:02 PM
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My Bosch (made in Brazil) left me stranded earlier this year. I replaced it with a PVR made in Germany. It's running strong thus far.

Last edited by HFR_Racer; 07-01-2011 at 05:28 PM..
Old 07-01-2011, 05:26 PM
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My Bosch (east Europe made) leaked a couple of years, drop by drop without any issues. But I am sure, it would fail in the future, but now I am on EFI
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Roland

930 Turbo '81 Too many modifications to list
Old 07-02-2011, 04:07 AM
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I was told that was pretty much the only guy that had a leaky coil... Glad to know that somebody else has the same problem...
The car still run but I was a bit worried that in the middle of a turn at the track it would fail and give me the catastrophic same effect as throttle lift...
Thanks for the PVR, I will look into that.
Anybody uses the MSD? Since I have it here already...
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David
1985 Black 930, K27 7006, Garretson Intercooler, Adj boost, TB: 23 - 31mm, bielstein sport shocks, ER polybronze bushings front and rear, ER monoball joints front and rear with offset camber plates, 935 X triangulated strut brace, raised spindles, racing bump steer kit
1981 Black 911sc (sold)
Old 07-02-2011, 06:52 AM
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I have a high vibration MSD coil on my 930. I can't speak to whether it would affect the longevity of the stock CDI, as I have a 6AL-2, but I can't think of any reason it would. Fits right in and works great. Cheap too, even cheaper since you already have one
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Old 07-02-2011, 03:56 PM
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I have a blaster coil on mine works just fine
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's.
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Old 07-02-2011, 04:27 PM
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Hi Ken911, do you run the original CDI box? How long have you been running with the MSD coil? I have read that they have very similar resistance values but also that the CDI was a bit fragile... Thanks
David
P.S. Anybody has a non-leaky one for sale?
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David
1985 Black 930, K27 7006, Garretson Intercooler, Adj boost, TB: 23 - 31mm, bielstein sport shocks, ER polybronze bushings front and rear, ER monoball joints front and rear with offset camber plates, 935 X triangulated strut brace, raised spindles, racing bump steer kit
1981 Black 911sc (sold)
Old 07-02-2011, 06:17 PM
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Shuz
 
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I have recently embraced my mid-life crisis by buying an '81 911sc targa to play with...

About 3 weeks after the contact high of leather seats mixed with hot engine oil smell in my garage is starting to loose it's effects on me. More and more everyday I am starting to see all the little things that soon will be driving my crazy about the car.

This weekend my major goal was to figure out the source of a solitary oil spot on my garage floor and a increase in the smell of smoke (burnt oil) in the garage when I pull in.*

Since day one I noticed a shine on my distributer cap, but I thought that the previous owner shined them up for me for fun. As it turns out it's oil dripping from my ignition coil, slowly working it's way down to the ground.*

Goodie for me no expensive engine gasket to change to cure an oil leak. A few bolts and a new coil should do the trick. Right?*

Here is the question... When I bought the car, the Porsche specialist that checked it out for me mentioned that my car had a Bosch CD and the Coil that was under my hood was not the correct one and should be changed before something gets fried.

The Bosch CD that is in my car has the following part numbers...0 227 300 004 12v. That is matching coil for my car?

Any info most appreciated.

Shuz
Old 08-07-2011, 07:09 PM
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According Bosch it's the correct CDI (P/N is not coil):

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930 Turbo '81 Too many modifications to list
Old 08-07-2011, 11:17 PM
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Shuz
 
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Thanks Proffighter for the info.


"That is matching coil for my car?" was supposed to read "What is the matching coil for my car?"

But your response answered my question anyway.

Shuz.
Old 08-08-2011, 12:11 PM
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