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Re: 86 Turbo Crossover pipe hell
Posted: Wed Oct 04, 2023 1:02 am
by Belgian951
Tom wrote: Tue Oct 03, 2023 2:58 pm
hmmm... if I'm doing metric right, .5cm is 5mm? 5mm is darn close by exhaust pipe flange standards.

If I am understanding that correctly, then you just need to muscle it into position with a screwdriver or whatever it takes.
That's quite a find on the one-piece crossover!
Yes, that's correct. Ok I'm going to try again this Saturday and I'll definitely report back.
It was indeed a lucky Ebay find, suggested to me by a member on another forum. I was doubting whether to buy it since it was quite expensive, but I believe I did the right thing after rechecking the redone welds on my two other pipes. Both pipes have fresh cracks in the new welds so welding definitely isn't easy to do I believe.
Re: 86 Turbo Crossover pipe hell
Posted: Wed Oct 04, 2023 6:43 am
by Cruise98
Try using an alignment punch. It is basically just a long punch and is used to align holes between two pieces.
I would not tighten any of the nuts until all of them are installed. You need all the wiggle room you can get.
Re: 86 Turbo Crossover pipe hell
Posted: Thu Oct 05, 2023 1:32 am
by Belgian951
Thanks. I had my brother take some photos of the misalignment. What do you all think?

- xover1.jpeg (187.58 KiB) Viewed 1312 times

- xover2.jpeg (147.61 KiB) Viewed 1312 times
Re: 86 Turbo Crossover pipe hell
Posted: Thu Oct 05, 2023 3:49 am
by ealoken
Loosen them on the head, and sqrew all places inn,turn by turn.
Re: 86 Turbo Crossover pipe hell
Posted: Thu Oct 05, 2023 5:04 am
by Belgian951
ealoken wrote: Thu Oct 05, 2023 3:49 am
Loosen them on the head, and sqrew all places inn,turn by turn.
Exhaust headers are loose. Do you think it's safe to pry them this much together?
Re: 86 Turbo Crossover pipe hell
Posted: Thu Oct 05, 2023 6:53 am
by Tom
Belgian951 wrote: Thu Oct 05, 2023 5:04 am
ealoken wrote: Thu Oct 05, 2023 3:49 am
Loosen them on the head, and sqrew all places inn,turn by turn.
Exhaust headers are loose. Do you think it's safe to pry them this much together?
From those pictures, they look close enough to pry over with a screwdriver safely. Pictures can be deceiving so use your best judgment, but that looks pretty typical...
Re: 86 Turbo Crossover pipe hell
Posted: Fri Oct 06, 2023 4:06 pm
by RUG8RB8
You must have a set of quality tapered punches to make this happen. A generous amount of antiseize on your bolts and nuts will assist as well. You will have to play around with order of install as you will learn certain ones need to be started and other holes left open.
Re: 86 Turbo Crossover pipe hell
Posted: Fri Oct 06, 2023 4:24 pm
by gpr8er
Belgian951 wrote: Thu Oct 05, 2023 1:32 am
Thanks. I had my brother take some photos of the misalignment. What do you all think?
xover1.jpeg
xover2.jpeg
The headers are most likely warped also a normal occurrence with these cars. That looks very doable. As others have said get a line up punch. Also FWIW I removed the studs in the head at the exhaust ports and used the same allen heads that are used for the intake manifold works really nice and when/if you need to R&R the headers you don't have to fight them to get around the studs. BTW when "we" say leave it loose that means only a few threads on the fastener.
Re: 86 Turbo Crossover pipe hell
Posted: Sat Oct 07, 2023 2:17 am
by Belgian951
RUG8RB8 wrote: Fri Oct 06, 2023 4:06 pm
You must have a set of quality tapered punches to make this happen. A generous amount of antiseize on your bolts and nuts will assist as well. You will have to play around with order of install as you will learn certain ones need to be started and other holes left open.
Thanks. I have bought 2 tapered punches, they'll arrive this evening.
Dumb question: do I have to hammer these punches at a sideways angle?
gpr8er wrote: Fri Oct 06, 2023 4:24 pm
Belgian951 wrote: Thu Oct 05, 2023 1:32 am
Thanks. I had my brother take some photos of the misalignment. What do you all think?
xover1.jpeg
xover2.jpeg
The headers are most likely warped also a normal occurrence with these cars. That looks very doable. As others have said get a line up punch. Also FWIW I removed the studs in the head at the exhaust ports and used the same allen heads that are used for the intake manifold works really nice and when/if you need to R&R the headers you don't have to fight them to get around the studs. BTW when "we" say leave it loose that means only a few threads on the fastener.
I wouldn't be surprised if these headers are warped or otherwise damaged. I noticed the PO did a poor welding job on one of them, so I just hope they are leak free... But if I ever replace them, I'll be sure to change the studs to the bolts. That's a good tip. Thank you!
Re: 86 Turbo Crossover pipe hell
Posted: Sat Oct 07, 2023 6:08 am
by gpr8er
Belgian951 wrote: Sat Oct 07, 2023 2:17 am
RUG8RB8 wrote: Fri Oct 06, 2023 4:06 pm
You must have a set of quality tapered punches to make this happen. A generous amount of antiseize on your bolts and nuts will assist as well. You will have to play around with order of install as you will learn certain ones need to be started and other holes left open.
Thanks. I have bought 2 tapered punches, they'll arrive this evening.
Dumb question: do I have to hammer these punches at a sideways angle?
gpr8er wrote: Fri Oct 06, 2023 4:24 pm
Belgian951 wrote: Thu Oct 05, 2023 1:32 am
Thanks. I had my brother take some photos of the misalignment. What do you all think?
xover1.jpeg
xover2.jpeg
The headers are most likely warped also a normal occurrence with these cars. That looks very doable. As others have said get a line up punch. Also FWIW I removed the studs in the head at the exhaust ports and used the same allen heads that are used for the intake manifold works really nice and when/if you need to R&R the headers you don't have to fight them to get around the studs. BTW when "we" say leave it loose that means only a few threads on the fastener.
I wouldn't be surprised if these headers are warped or otherwise damaged. I noticed the PO did a poor welding job on one of them, so I just hope they are leak free... But if I ever replace them, I'll be sure to change the studs to the bolts. That's a good tip. Thank you!
No, you don't hammer in the punch. Get everything end to end rattle loose and start prying the best spot where you can get the punch in across 2 holes. Get a bolt in and keep going. It's going to fight you and will take some time
https://www.amazon.com/Stanley-Proto-J1 ... 163&sr=1-6