sparkplug problem
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 861
Likes: 0
From: WNY
sparkplug problem
If its not one thing its another:
Would shorty sparkplugs fix this issue? The headers are barely clearing the plugs and the wires either not going to go on at all, or are going to completely roast against the headers.
This is a new motor from top to bottom, reusing the same headers off the old one:
Would shorty sparkplugs fix this issue? The headers are barely clearing the plugs and the wires either not going to go on at all, or are going to completely roast against the headers.
This is a new motor from top to bottom, reusing the same headers off the old one:
Racer
Joined: Nov 2008
Posts: 297
Likes: 3
Plug and header clearance
OK, here is how I cured the problem on my new engine. First of all, go to the parts store and buy a set of short (for header clearance) spark plugs. Accel and NGK and maybe other companys make them. Install them in engine and install plug wires and then take a felt marker and mark the header where the interference is. Do this for all and any plugs and wire boots that are a close fit to header. Then remove headers and place in a bearing press between two blocks of wood and put pressure on spots that you marked and this will oval the tube and give you enough clearance. When you use this method the headers will not be damaged and the flow will not be reduced in the tube. It will look like they were manufactured this way. If that is to much work for you, take ball peen hammer and hammer away at felt pen marks, which in my opinion will ruin the headers.
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 861
Likes: 0
From: WNY
Well the plug boots would actually go on now if I forced them to.. there is about 1/8" clearance as it is right now - with short plugs and 90* boots do you think that would clear? And are there any *HEAVILY* insulated spark plug boots out there? lol
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 861
Likes: 0
From: WNY
They are patriot freedom series CNC heads. Ive been really pleased with the fit/finish of them so far, they came in looking great - this has been my first issue of any type.
I'll try a set of the short plugs and see if those will clear. Thanks!
I'll try a set of the short plugs and see if those will clear. Thanks!
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
yes there are cloth tubes of fire resistant material you can put over the end of the spark plug wires they look like "fingers" cut off of a knit glove and open at each end
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
