C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Disconnecting the coil

Thread Tools
 
Search this Thread
 
Old Apr 8, 2003 | 09:03 PM
  #1  
BIG K's Avatar
BIG K
Thread Starter
Pro
 
Joined: Nov 1999
Posts: 659
Likes: 0
From: Woodland Ca
Default Disconnecting the coil

I want to disconnect the coil so that I can prime the oil pump without the engine running. Since the coil is built into the distribitor cap, how is this done?
Thanks
Reply
Old Apr 8, 2003 | 09:23 PM
  #2  
jackdaroofer's Avatar
jackdaroofer
Race Director
Supporting Lifetime Gold
15 Year Member
 
Joined: Dec 1999
Posts: 11,182
Likes: 2
From: Almost all Skyline Cruises Vettes at Waterside 1-5
Cruise-In I Veteran
Cruise-In II Veteran
Cruise-In III Veteran
Cruise-In IV Veteran
Cruise-In V Veteran
Cruise-In VI Veteran
Cruise-In VII Veteran
Default Re: Disconnecting the coil (BIG K)

I want to disconnect the coil so that I can prime the oil pump without the engine running. Since the coil is built into the distribitor cap, how is this done?
Thanks
I believe, to do what you are seeking, you can simply pull (gently) the white, black and brown wires ( I think those are the right colors) from the Dist Cap.

Or you could always remove the coil itself, just four screws plus the wires I mentioned.

:steering:
Reply
Old Apr 8, 2003 | 09:30 PM
  #3  
sumoboy's Avatar
sumoboy
Racer
 
Joined: Feb 2003
Posts: 415
Likes: 0
From: Joppa Md
Default Re: Disconnecting the coil (BIG K)

There should be a red Batt wire on the side of the cap. You can unplug that.



[Modified by sumoboy, 2:45 AM 4/9/2003]
Reply
Old Apr 8, 2003 | 11:46 PM
  #4  
BIG K's Avatar
BIG K
Thread Starter
Pro
 
Joined: Nov 1999
Posts: 659
Likes: 0
From: Woodland Ca
Default Re: Disconnecting the coil (jackdaroofer)

OK. That sounds easy enough. Thanks.
One more step closer to starting her up!
Reply
Old Apr 9, 2003 | 12:05 AM
  #5  
scorp508's Avatar
scorp508
Team Owner
Supporting Lifetime Gold
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Default Re: Disconnecting the coil (BIG K)

Pull the single red wire (white clip I think) off of the cap and you'll be good to go. How are you going to prime it, using the starter motor? If so pull the plugs so that its much easier on the motor.
Reply
Old Apr 9, 2003 | 02:31 AM
  #6  
BIG K's Avatar
BIG K
Thread Starter
Pro
 
Joined: Nov 1999
Posts: 659
Likes: 0
From: Woodland Ca
Default Re: Disconnecting the coil (scorp508)

Thanks for the idea. How is it easier on the motor(starter?).
Reply
Old Apr 9, 2003 | 02:55 AM
  #7  
70ZZ3 96LT4's Avatar
70ZZ3 96LT4
Burning Brakes
15 Year Member
 
Joined: Oct 2001
Posts: 911
Likes: 5
From: TN
Default Re: Disconnecting the coil (BIG K)

no compression
Reply
Old Apr 9, 2003 | 09:49 AM
  #8  
BIG K's Avatar
BIG K
Thread Starter
Pro
 
Joined: Nov 1999
Posts: 659
Likes: 0
From: Woodland Ca
Default Re: Disconnecting the coil (70ZZ3 96LT4)

I guess I'm just lazy about doing more work. Doesn't the same pressure happen when it's just hard to start? Normally does't more pressure exist because of detination?
Just trying to expand my knowlege and of course not hurt the car! :yesnod:
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old Apr 9, 2003 | 10:39 AM
  #9  
scorp508's Avatar
scorp508
Team Owner
Supporting Lifetime Gold
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Default

If you pull the sparkplugs then all the air on the compression stroke will just be forced out the plug holes instead of being compressed inside the cylinder.
Reply
Old Apr 9, 2003 | 11:18 AM
  #10  
65Z01's Avatar
65Z01
Team Owner
20 Year Member
 
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Default Re: Disconnecting the coil (BIG K)

Scorp is right; think of the compression ratio. Compression accounts for most of the pumping work done by the motor in the compression phase of the cycle. Of course during the charge burn phase cylinder pressure takes a large jump upward.

Pull the wires from the side of the dist to prevent a spark. Also pull the two Injector fuses to prevent fuel from entering the cylinders during cranking. No need to wash them before it starts.
Reply
Old Apr 9, 2003 | 11:27 AM
  #11  
Steve85's Avatar
Steve85
Melting Slicks
25 Year Member
Photogenic
Liked
Loved
 
Joined: May 2001
Posts: 3,270
Likes: 26
From: Winchester VA
Cruise-In V Veteran
Default Re: Disconnecting the coil (BIG K)

Thanks for the idea. How is it easier on the motor(starter?).
I think we have a mix-up in terminology. Using more traditional definitions to clarify, removing the plugs makes it easier on the engine (no pressure on rotating assy) , the starter motor is not a concern.

Give me fuel, give me fire, coming soon to an engine near you :D .
Reply
Old Apr 9, 2003 | 11:55 AM
  #12  
scorp508's Avatar
scorp508
Team Owner
Supporting Lifetime Gold
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Default Re: Disconnecting the coil (Ski2Tee)

I think we have a mix-up in terminology. Using more traditional definitions to clarify, removing the plugs makes it easier on the engine (no pressure on rotating assy) , the starter motor is not a concern.
Nothing is mixed up. Removing compression from the engine will make it MUCH easier on the starter motor. The engine itself who cares it can handle it. If he's planning on running the starter motor for a while to prime the oil I'm sure it would be much happier to do it with a free spinning engine.
Reply

Get notified of new replies

To Disconnecting the coil





All times are GMT -4. The time now is 07:50 PM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE