Possible HEI rotor problem? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 07-10-2010, 02:19 AM
Registered User
Last photo:
Join Date: Feb 2008
Location: Calgary, AB
Posts: 28
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Possible HEI rotor problem?

I have an HEI I bought new 5 years ago and I made the following modifications:
Replaced aluminum point cap with a copper one
Replaced stock coil with an Accel 48,000V HEI coil
Replaced stock ignition module with an Accel fast charge module.

I had the HEI housing off today to set ignition points and noticed that the narrow plate the rotor cap is bolted to is easily made to wobble off-axis using my thumb and index finger on each end. Is this wobble normal? The dist. shaft itself seems fine.

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 07-10-2010, 02:56 AM
jon72vega's Avatar
WOW, I could have had a V8!
Last photo:
Join Date: Sep 2006
Location: Michigan
Age: 64
Posts: 123
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
There are no points to set on an HEI.

Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-10-2010, 06:20 AM
cobalt327's Avatar
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Posts: 5,031
Wiki Edits: 1616

Thanks: 128
Thanked 616 Times in 565 Posts
Whether the distributor is an HEI or points- that is NOT normal! It says that the distributor is badly worn, and in all probability too far gone to mess w/fixing, there's no replaceable bushings on the plate that rotates on the shaft. The only hope might be a replacement plate from a junk distributor- if the shaft isn't too far gone, but all in all, I'd say to just replace the whole distributor and be done w/it.

You obviously can swap out the aftermarket parts from the bad distributor to the new one.

If the distributor IS a GM HEI, there's no adjustment for the reluctor to pick up coil gap. If yours is moving that much, I'd suspect the reluctor has already contacted the PU coil and has done damage there, as well.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-10-2010, 02:24 PM
Registered User
Last photo:
Join Date: Feb 2008
Location: Calgary, AB
Posts: 28
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
oops, didn't mean "set ignition points" I meant to say "line reluctor points up", Your right Jon, there is no point gap to set on an HEI, your statement doesn't help regardless of if I have an HEI or points ignition, they both have rotor caps which mount to a plate.

I was hoping I wouldn't have to change the distibutor but that rotor cap plate is definately letting the cap wobble. The mech. advance seems unaffected and the wobble isn't affecting where the rotor points but the top contact is probably swinging around as it wobbles, throwing off the timing.

I'm thinking of upgrading to an electronic controlled distributor so I can set it up in my EFI program but I'm not sure which one to get. I'm going to have to get a separate coil aren't I? Maybe I should buy an MSD ignition box...ugh, decisions! Thanks for the help again, Cobalt
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-11-2010, 10:56 PM
Registered User
Last photo:
Join Date: Feb 2008
Location: Calgary, AB
Posts: 28
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
So I decided to go with a 1994 Chevy 2500 SBC computer controlled HEI. Went to the parts store and had them bring me a new and a refurbished distributor. The new one was shinier and came with a cap and rotor but the shaft end play was 0.04!! Apparently that amount of end play is acceptable in new parts now. The refurbished one had a new gear put on and its end play is 0.025 plus the two ventilation screens in the bottom are obviously a higher quality than the new one.

I get a good discount at the parts store so I bought:
reman. distributor
MSD cap
MSD rotor
MSD blaster 2 coil
coil bracket
two pigtails for the distributor wiring; and a
4 pin GM metripak connector kit

Paid $384 Canadian and spent the afternoon connecting the wiring and setting the distributor to the EFI computer. My timing stays within a degree of what the computer sets, which is a little better than the 2 degrees my HEI when it was still good did, which had an end play of 0.02...its a world better than swinging 30 degrees out!
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Temp, Oil and Gas Gauges Pegs when HEI hooked up. lazydawg Electrical 1 04-09-2010 10:39 AM
GM HEI Module Keeps Burning Out ripvanhalen Electrical 6 09-24-2007 11:28 PM
Ford HEI csracing Engine 2 12-03-2006 07:06 PM
Do I Need Little HEI Box for New HEI Dist? Mr.56Chevy Electrical 0 12-23-2002 02:38 PM

All times are GMT -6. The time now is 12:26 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.