Exhaust Bolt question

[Kurt B.]

Posting this on behalf of new member RPOL36 who just joined NCRS and asked me to post his question:
"Hi, I just joined the board and I own a 68 convertible 427/390 4sp built D07. The exhaust manifold bolt kit from Paragon matches some of the ones I took off which I assume are original since they match the head mark Paragon said was correct.

However, the stud bolt on the drivers side is different from what I took off the car. My question is which is correct? the old one I took off or the plain stud one Paragon sent me in the kit.. I attached a pic to this post: the top/rusty one is what I took off, the one below it is from Paragon. Which one is correct?

PS: this car is a power steering car I think that relates to what type bolt was used here according to Paragon. Also, where on the drivers side does this one go? I think its the first bolt from the front on the drivers side, correct?

thanks!"

Kurt
#26406

[William C.]

Picture is dreaded "red X" *NM*

[Kurt B.]

Re: Picture is dreaded "red X"

I tried but I don't know how to post pictures. I entered the URL but must have doen something wrong.
I am certainly no Bill Gates when it comes to computers
Kurt

[Kurt B.]

Re: Picture is dreaded "red X"

Here is the URL for the picture of the two different studs.
Not sur eif this will work

Kurt

[Dick W.]

Re: Picture is dreaded "red X"

I believe that the old stud is the correct one

[Kurt B.]

Re: Picture is dreaded "red X"

Dick,
I had the same one on my smallblock and that is why I also thought it was the correct one but didn't know if maybe the big block motors used different studs.
Kurt

[Michael W.]

I thought the picture looked familiar

http://forums.corvetteforum.com/show....php?t=1733240

[William C.]

Re: Picture is dreaded "red X"

I vote for the old one with the flange.

[tom444634]

Re: Exhaust Bolt question

Kurt,

I also went through the same thing. I have the same picture! The shouldered one is the original from my 71 LS5. I used 15 Paragon bolts and put the original stud back in (with some antiseize).

Tom

[Joe L.]

Re: Picture is dreaded "red X"

Kurt-----

Run a NEW 3/8-16 nut BY HAND down the threads (long end) of BOTH studs and tell me how it goes with each.

[Joe L.]

Addendum

Kurt-----

Also, you can and should thoroughly wire brush the threads of the old stud prior to running the nut down BY HAND. However, DO NOT run a die, thread-cutting or thread cleaning, on the threads.

[Phil P.]

joe do you suspect a china bolt ? *NM*

[Brandon Thompson]

Re: Addendum

Hey, I'm the owner of the 68 with this question kurt was nice enough to post it since I wasn't able to get signed on here but I finally got the profile working!

Ok so sounds like the one I took off is correct...I cleaned it up and plan to re-use it where does it go I think it is the first bolt back from the front of the engine right?

the other bolts in the kit match what I think are originals I took off the double circle hex heads.

I also am still a little un sure about what I should do about lock washers, french locks, or no washers etc.. I'm not sure what is correct.

I want to go the correct route on that also and this is for a D07 build date 68 4sp 427/390 if any of that info is needed..

I was told the bolts could be locking bolts??

thanks!

[Geoff C.]

[Joe L.]

Re: joe do you suspect a china bolt ?

PHIL----

No, not at all. I'm just trying to confirm if it's an original stud. More info on that after we find out the answer to the question I posed.