New leaking coil

[barbee6043]

OEM coils all seem to mount horizontal, dunno know. I blame China!!!!!!!!

 

[Dan64]

Most older aftermarket and factory coils could be mounted horizontally but the newer ones say not to. I guess the new ones are made more cheaply than the older ones. MSD does sell a "High Vibration " (#8222) Blaster coil that can be mounted horizontally, as it is epoxy sealed.

 

[oldkimmer]

I’ve seen older builds with the coil wire coming from the bottom. Kim

 

[RJRENTON]

IMO....
You have two choices:
1) Replace the coil
2) Replace the coil
Unless you do not mind breaking down on the way home from a cruise or similar outing, during a pouring down rain.
Coils sre filled with oil because the oil provides a heat trsnsfer media and more importantly, the oil is actually an insulating fluid that prevents the high voltage from arcing internally to the case. Perhaps you should consider an EPOXY FILLED coil that is both vibration and heat resistant. The only drawback, they cost more...maybe 1.5x more than a standard oil filled coil. Is the dollar difference worth it???....only you can decide....but it it was my problem, I'd spend the additional $$$. Just my opinion of course.
BOB RENTON

 

[mopar 3 B]

Epoxy and heat I have to question that. Maybe jell filled.

 

[troublemaker]

I had the same problem with an MSD Blaster mounted horizontally, for stock 6 pack set up. Called MSD and they told me not to mount them horizontally - oil filled will leak. They’re words, not mine. Bought a solid canister, mount it upside down if I want to with no problems.

 

[RJRENTON]

Epoxy and heat I have to question that. Maybe jell filled.

The epoxy resin becomes the heat transfer media from the heat generated (watts) by the windings (I2R losses) during operation and the heat generated by the engine, if the coil is mounted on the engine. During manufacture, the epoxy is poured into the coil mould, surrounding and insulating the windings from ground and upon its cure, provides a homogeneous assembly impervious to the surroundings. Having designed high temperature high voltage transformers (in this instance a coil) i have never heard of a jell filling used as a heat transfer - insulating medium including silicon or any PCB (Poly Chlorinated Biphenly) compounds. Just my opinion of course.
BOB RENTON

 

[Bee1971]

Epoxy and Heat - At least it didn’t leak - Just popped

Lasted one day and left me stranded about 20 miles from home off the highway last night

Four different cops stopped to say HI before my wife showed up

And the only reason this MSD coil went on my car was that my friend burrowed or wanted to try my Pertronix 40011 Coil after his Blaster 2 coil failed during a cruise last weekend

Yes I was running full voltage to the positive side of this epoxy filled MSD coil as the Pertronix 40011 coil requires it running a internal 1.5 ohm resistor

But this MSD coil is also internally regulated at .7 ohms

Never have I had a coil explode before

 

[steve340]

I was looking at those wondered if it was good or bad with the epoxy.
Your experience of 1 day then a break down is a vote of no confidence.
Thanks for posting.

 

[RJRENTON]

Epoxy and Heat - At least it didn’t leak - Just popped

Lasted one day and left me stranded about 20 miles from home off the highway last night

Four different cops stopped to say HI before my wife showed up

And the only reason this MSD coil went on my car was that my friend burrowed or wanted to try my Pertronix 40011 Coil after his Blaster 2 coil failed during a cruise last weekend

Yes I was running full voltage to the positive side of this epoxy filled MSD coil as the Pertronix 40011 coil requires it running a internal 1.5 ohm resistor

But this MSD coil is also internally regulated at .7 ohms

Never have I had a coil explode before

View attachment 968956 View attachment 968957

You mentioned that the MSD coil was "regulated" at 0.7 ohms. How was this accomplished? The 0.7 ohm figure was probably the primary winding's resistance. There is nothing in the coil exept the primary and secondary copper windings and the laminated steel core plus the insulation system, between the primary and secondary windings and the case with either insulating oil or epoxy. Your coil failure was PROBABLY due to the breakdown of the epoxy, due to excessive heat or vibration, allowing the high voltage developed by the secondary windings to go to ground. Once the arc path was established, the voltage will continue to follow the same path. Just my opinion of course.
BOB RENTON

 

[Bee1971]

Just had my Pertronix 40011 1.5 Ohm Coil crack the tower plastic and around the studs for the positive and negative

Thru google search , seems to bee a popular area to crack

Coil did not fail , car still running

This one was made in Mexico
New one is made in China

Anyways , now an MSD and a Pertronix coil both cracked , i would assume from heat obviously

Ballast resistor bypassed on the backside
12.5 Volts at battery with engine not running , key in run position
14.5 Volts at battery with engine running

Full voltage to positive side of coil

Mopar Performance Chrome ECU from 2001
Starts/Idles Flawless
New engine wiring harness
New Firecore Vacuum Distributor