what does the spring do on plug shield?
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,707
Likes: 285
what does the spring do on plug shield?
I have seen pictures of spark plug wires with the heat shield. There appears to be a spring at the end of the shield. What is the purpose of the spring? Does it help hold the wire on the plug? And does the spring make it more difficult to pull the wire off the plug?
Thanks,
Trebor
PS - I have a 2006 and it has the shields. At 46,000 miles, I am just looking ahead to changing them someday.
OK - since I have had almost 40 views and no responses, maybe a pic is in order. Here is a guy from the sales forum trying to sell his plug wires. He posted a pic of the plug wires so you can see what I am talking about. Note the spring at the bottom of the shields.
https://www.corvetteforum.com/forums...s-7-total.html
Thanks,
Trebor
PS - I have a 2006 and it has the shields. At 46,000 miles, I am just looking ahead to changing them someday.
OK - since I have had almost 40 views and no responses, maybe a pic is in order. Here is a guy from the sales forum trying to sell his plug wires. He posted a pic of the plug wires so you can see what I am talking about. Note the spring at the bottom of the shields.
https://www.corvetteforum.com/forums...s-7-total.html
Last edited by Trebor; Jun 10, 2019 at 10:28 PM.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 808
From: West coast CA
The plug wires are clearanced by the spark plug terminal, not the heat shield, which is necessarily shorter. I think the spring just takes up the gap and prevents the shield rattling against the plug body.
Last edited by torquetube; Jun 11, 2019 at 04:58 AM.
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,707
Likes: 285
Trebor
Melting Slicks
Joined: Jul 2010
Posts: 3,001
Likes: 243
From: Surprise, Az
I would certainly re-use them. A tip I picked up when changing the plugs at 100k miles on my Yukon where it is difficult to get enough mechanical advantage to remove the plug wire/boot from the plug, use a shoelace. Tie a shoelace onto the boot so you can get your hands back for better mechanical advantage to remove the boot if it is stuck to the plug.
Instructor
Joined: Sep 2015
Posts: 167
Likes: 33
From: TN
The real reason the spring is there is for EMC concerns. The spring guarantees that the shield is grounded to the block.
i know you called it a heat shield and although it might act like a heat shield , I was told it’s also needed for EMC concerns.
i know you called it a heat shield and although it might act like a heat shield , I was told it’s also needed for EMC concerns.
Last edited by luka2sb; Jun 12, 2019 at 07:58 PM.
