Hedman 68448 Headers
Thread Starter
Burning Brakes
Joined: Feb 2000
Posts: 871
Likes: 1
From: Westland MI.
Hedman 68448 Headers
I bought a pair of 68448 headers and installed them on my 1987 Convertible. Went on pretty easy, but when I was installing the spark plugs I'm unable to start 3 and 4. The plug hits the tubes from cylinders 1 and 2. I'm running AFR 210cc heads with L-98 angled plugs, and Autolite 103 plugs. I compared the 103s to the stock plugs for length and they're the same length.
Anyone else have this problem?
I'm not really wanting to heat and bend the pipes out of the way because I don't want to ruin the coating on the headers. Anyone know of a spark plug similar to a 103 heat range thats shorter? Any other ideas?
For right now, I may loosen the headers just to get the plugs in, but don't want to do that every time I change plugs.
Anyone else have this problem?
I'm not really wanting to heat and bend the pipes out of the way because I don't want to ruin the coating on the headers. Anyone know of a spark plug similar to a 103 heat range thats shorter? Any other ideas?
For right now, I may loosen the headers just to get the plugs in, but don't want to do that every time I change plugs.
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Hi Fast, i have the 68448 headers and i was surprised at how easy was to change plugs now ! I have AFR195's, L98 angle as well, i have the 65cc version which goes lower than the 75cc and that might affect something but im not sure.
If you want i can take a set of detailed picture tomorrow.
Im using 61-429 AC Delco plugs recommended by AFR.
If you want i can take a set of detailed picture tomorrow.
Im using 61-429 AC Delco plugs recommended by AFR.
Thread Starter
Burning Brakes
Joined: Feb 2000
Posts: 871
Likes: 1
From: Westland MI.
Thanks for the reply.
I loosened the headers and installed the plugs. When I put the boots on, the #3 boot touches the tube from cyl. 1. I'm thinking I'll have to heat and bend the tubes away to give me the clearance.
I loosened the headers and installed the plugs. When I put the boots on, the #3 boot touches the tube from cyl. 1. I'm thinking I'll have to heat and bend the tubes away to give me the clearance.
Thread Starter
Burning Brakes
Joined: Feb 2000
Posts: 871
Likes: 1
From: Westland MI.
I would like to see what your boots look like without the heat sleeve. Especially on the #3 cylinder.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Burning Brakes
Joined: Feb 2000
Posts: 871
Likes: 1
From: Westland MI.
Grainy picture, but you can see how close the boot is to the tube. At least with the camera pic I can see it isn't touching. I still have the problem of not being able to install or remove the plugs without loosening the headers.
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Your headers are on my exact same position and i have no problems to change plugs !
wait wait ...must be a difference !!!
i see the sensor way lower than mine !!!
I Will go to take pics now ....
wait wait ...must be a difference !!!
i see the sensor way lower than mine !!!
I Will go to take pics now ....
Thread Starter
Burning Brakes
Joined: Feb 2000
Posts: 871
Likes: 1
From: Westland MI.
Looks like from your pic to mine, the header flanges sit higher on my 210s. That would explain why I'm having problems with the plugs. The water temp sensor looks lower, and the hole above the flange is partially hidden on mine where yours is in full view.
I might have to pull out the stock heads and take some measurements. At least now I know its not me.
I might have to pull out the stock heads and take some measurements. At least now I know its not me.
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
That's it , your head is a different design, i didnt know this but i use 7.200 pushrods with 65cc AFR195 heads, a friend has the 75cc version and he uses 7.350s !!!
So i think the 64448's are best suit for 195 and 180's and yours being a 210 set
is a total different thing ! I can see the wire loom hole covered by the headers on yours !
This is all we need to see , its crystal clear, can you still return those headers ???
So i think the 64448's are best suit for 195 and 180's and yours being a 210 set
is a total different thing ! I can see the wire loom hole covered by the headers on yours !
This is all we need to see , its crystal clear, can you still return those headers ???
Thread Starter
Burning Brakes
Joined: Feb 2000
Posts: 871
Likes: 1
From: Westland MI.
I guess it wouldn't be a hobby if it wasn't expensize and didn't drive you crazy.
I'll just keep the headers since I already welded my O2 bung into the bolt on collector. Not a huge deal. Next time I need to remove the plugs I'll get the torch out and heat and bend a little.
I might call Hedman and let them know about the difference between the 180, 195, and 210cc AFR heads. Who knows maybe they'll want my car for a prototype header and let me keep them.
Thanks for the help Calderone
I'll just keep the headers since I already welded my O2 bung into the bolt on collector. Not a huge deal. Next time I need to remove the plugs I'll get the torch out and heat and bend a little.
I might call Hedman and let them know about the difference between the 180, 195, and 210cc AFR heads. Who knows maybe they'll want my car for a prototype header and let me keep them.
Thanks for the help Calderone
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
You're welcome but ......
Did you weld your bug into the reducer ? so what , they sell those reducers !!!
you can buy another and return them
Did you weld your bug into the reducer ? so what , they sell those reducers !!!
you can buy another and return them
