85 Spark plug wire routing
#1
85 Spark plug wire routing
Hey Guys
I know this is an old topic and I think I read most of the forums, but still unsure if it was determined that the #2 and 3 wire should run behind the distributer even though the FSM says that it should run it front of the distributer. And also what number plug shoud the straight boot go on.
As always thank you !
I know this is an old topic and I think I read most of the forums, but still unsure if it was determined that the #2 and 3 wire should run behind the distributer even though the FSM says that it should run it front of the distributer. And also what number plug shoud the straight boot go on.
As always thank you !
#2
I don't believe it could be called straight but #6 is the lone different boot. I've seen it called 135° but it is for sure the lone different on an L98.
If you look closely at the images in the FSM you can see that thy're NOT TPI images but much older HEI routing.
I believe your mention of #2 & #3 to the rear I believe is correct.
If you look closely at the images in the FSM you can see that thy're NOT TPI images but much older HEI routing.
I believe your mention of #2 & #3 to the rear I believe is correct.
The following users liked this post:
Jackzap (06-27-2017)
#3
I don't believe it could be called straight but #6 is the lone different boot. I've seen it called 135° but it is for sure the lone different on an L98.
If you look closely at the images in the FSM you can see that thy're NOT TPI images but much older HEI routing.
I believe your mention of #2 & #3 to the rear I believe is correct.
If you look closely at the images in the FSM you can see that thy're NOT TPI images but much older HEI routing.
I believe your mention of #2 & #3 to the rear I believe is correct.
#4
Race Director
Hey Guys
I know this is an old topic and I think I read most of the forums, but still unsure if it was determined that the #2 and 3 wire should run behind the distributer even though the FSM says that it should run it front of the distributer. And also what number plug shoud the straight boot go on.
As always thank you !
I know this is an old topic and I think I read most of the forums, but still unsure if it was determined that the #2 and 3 wire should run behind the distributer even though the FSM says that it should run it front of the distributer. And also what number plug shoud the straight boot go on.
As always thank you !
The following users liked this post:
Jackzap (06-28-2017)
#5
I changed the wires on my OO 85 last Sunday. They had never been changed, and no one has touched this car except myself since new. #3 and #2 were both routed behind the distributor. I too saw the routing in the 85 FSM, and was perplexed. About 10 years ago I removed the distributor for access to replace the oil pressure sender. I was wondering if I had changed the routing at that time, but couldn't remember. I decided I probably hadn't, because the holders were still intact and untouched, plus I usually pay attention to details like this on this car.
So thanks for the confirmation that they were very likely always routed behind.
So thanks for the confirmation that they were very likely always routed behind.
here's a pic of a NOS, 1990 L98 - with a few minor exceptions, the basic routing is the same for all L98 engines -
Last edited by Joe C; 06-28-2017 at 05:06 AM.
#6
I think you'll find that #1, #2, and #3 all route behind the distributor in the area just below the distributor cap. there should be a three wire routing clip securing all three.
here's a pic of a NOS, 1990 L98 - with a few minor exceptions, the basic routing is the same for all L98 engines -
here's a pic of a NOS, 1990 L98 - with a few minor exceptions, the basic routing is the same for all L98 engines -
#7
Race Director
Here are pics of the L98 on display at Mid America. The engine is a sealed Corvette Challenge engine and should be correct.
#8
Yes. The posts ahead of me mentioned only #2 and #3, so I too forgot about #1 goes behind too.
And thanks for the pic. I couldn't figure out exactly where / how the 5-wire holder went. Now I see it in the pic.
I just used generic wires from Vato Zone. The lengths were pretty good, but of course not exact, so I had to do as best I could with routing and fit without it looking like azz. At least they are grey 8MM with black boots. Is anyone aware of a source for better replicates of the originals? The individually numbered wires would be nice, but probably not a chance.
I usually don't change things on this car unless I have to. I finally HAD to change the wires. They went bad just sitting. Ran fine last Summer, ran like crap this Spring. They were exactly 32 years old. I got my money's worth.
And thanks for the pic. I couldn't figure out exactly where / how the 5-wire holder went. Now I see it in the pic.
I just used generic wires from Vato Zone. The lengths were pretty good, but of course not exact, so I had to do as best I could with routing and fit without it looking like azz. At least they are grey 8MM with black boots. Is anyone aware of a source for better replicates of the originals? The individually numbered wires would be nice, but probably not a chance.
I usually don't change things on this car unless I have to. I finally HAD to change the wires. They went bad just sitting. Ran fine last Summer, ran like crap this Spring. They were exactly 32 years old. I got my money's worth.
I vaguely recall some place that had reproduction wire sets that were numbered. i'm thinking they might have been on a site that supplied parts for buick GN restoration. I know they have repro sets for c2 and early c3 cars. i'm thinking lectric-limited is the supplier.
#9
Thank you for that pic. I like your car. Clean.
I see that your hood release cable is routed behind the distributor. Mine is in front. I'm pretty sure its always been in front. It's way up high, just under the plenum extension cover. No way to change it now, it has a heat-set bend that will never allow repositioning. Interesting that two fairly original cars are different.
I see that your hood release cable is routed behind the distributor. Mine is in front. I'm pretty sure its always been in front. It's way up high, just under the plenum extension cover. No way to change it now, it has a heat-set bend that will never allow repositioning. Interesting that two fairly original cars are different.
my thing today is, just to keep it clean, well maintained, and drive the hell out of it. I still enjoy all the cleaning, detailing, and the occasional wrenching - I think of it as mental therapy. most likely, this 85 will outlast me!
Last edited by Joe C; 06-30-2017 at 07:52 AM.