MSD GM HEI Rotor
PN 84101
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new products that you ask for! Go to www.msdperformance.com/registration.
Parts Included:
1 - Rotor
2 - Screws
2 - Belleville Washers
The MSD GM HEI Rotor is supplied ready to install on MSD’s HEI Distributor, PN 8365. It can also be
used on stock GM HEI Distributors by removing the x-shaped Rotor Adapter as shown in Figure 1.
STOCK GM HEI
MSD HEI DISTRIBUTOR
INSTALLATION
ROTOR ADAPTER
LEAVE ADAPTER INSTALLED
REMOVE ADAPTER
Figure 1 Removing the Rotor Adapter for Stock Applications.
DOME MUST
FACE UP
ROTOR TANG
APPLY SPARK
GUARD HERE
(SEE PAGE 2)
ALIGNING SLOT
Figure 2 Installing the Rotor.
MSD
•
WWW.MSDPERFORMANCE.COM
• (915) 857-5200 • FAX (915) 857-3344
TECH TIPS
ROTOR TANG CONTACT
Make sure the rotor tang makes contact with the rotor bushing in the center of the cap. You can
slightly push or bend the tang up. Confirm contact by applying grease to the tang, install the cap,
then check for contact. (Remove grease before final assembly.)
SPARK GUARD
For improved protection against spark arc-through, apply a small amount of MSD Spark Guard, PN
8804, in the rotor tang well area (Figure 2). This is not necessary, but just added protection.
LOW RESISTANCE ROTOR BUSHING
If you are running an MSD Digital Series Ignition Control, a 7-Series Ignition Control, or the 20 Amp
Extreme HEI Module, the MSD Low Resistance Rotor Bushing, PN 8412, must be used. If a stock
rotor bushing is used damage will occur to the cap and rotor due to excessive heat build up caused
by the high resistance of the stock rotor bushing.
Service
In case of malfunction, this MSD component will be repaired free of charge according to the terms of the warranty.
When returning MSD components for warranty service,
Proof of Purchase
must be supplied for verification. After
the warranty period has expired, repair service is based on a minimum and maximum fee.
All returns must have a Return Material Authorization (RMA) number
issued to them before
being returned. To obtain an RMA number please contact MSD Customer Service at 1 (888) MSD-7859 or visit
our website at www.msdperformance.com/rma to automatically obtain a number and shipping information.
When returning the unit for repair, leave all wires at the length in which you have them installed. Be sure to include
a detailed account of any problems experienced, and what components and accessories are installed on the vehicle.
The repaired unit will be returned as soon as possible using Ground shipping methods (ground shipping is covered
by warranty). For more information, call MSD at (915) 855-7123. MSD technicians are available from 7:00 a.m. to
5:00 p.m. Monday - Friday (mountain time).
when properly installed and purchased from an authorized MSD dealer, for a period of one year from the date of
the original purchase. This warranty is void for any products purchased through auction websites. If found to be
defective as mentioned above, it will be repaired or replaced at the option of MSD. Any item that is covered under
this warranty will be returned free of charge using Ground shipping methods.
This shall constitute the sole remedy of the purchaser and the sole liability of MSD. To the extent permitted by
law, the foregoing is exclusive and in lieu of all other warranties or representation whether expressed or implied,
including any implied warranty of merchantability or fitness. In no event shall MSD or its suppliers be liable for special
or consequential damages.
*Intended normal use means that this item is being used as was originally intended and for the original application
as sold by MSD. Any modifications to this item or if it is used on an application other than what MSD markets the
product, the warranty will be void. It is the sole responsibility of the customer to determine that this item will work for
the application they are intending. MSD will accept no liability for custom applications.
M
SD warrants this product to be free from defects in material and workmanship under its intended normal use*,
Limited Warranty
MSD
•
WWW.MSDPERFORMANCE.COM
• (915) 857-5200 • FAX (915) 857-3344
© 2014 MSD LLC
FRM28621
Revised 01/14
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