Exhaust Manifold Stud Oil Leak

[Cal55]

Originally Posted by 1991ZR1

I haven't driven the car since January but this is how things went.

I put the driver side center stud back in with RTV sealant. If I had to do this job again, I think it could be done without removing the manifold. I would try backing all the bolts out and move the manifold away from the head as I remove the center nut. That would give more working space.

After I finished the driver side, I worked on the passenger side. It was much easier. I did not have to remove the manifold or any of the bolts. I did remove the check valve from the AIR tubes though.

After I finished both sides, I started up the car and let it run. After it warmed up, both sides started smoking. I just let it run and eventually all the smoking stopped.

Last week I started up the car again and let it run. There was no smoke from the driver side and a very light smoke from the passenger side which stopped after a short time.

I would have to assume there was some residual oil and the RTV on the studs repaired the problem.

I looked at the passenger side manifold stud and there is oil residue on it and the manifold. How did you remove the check valve from the AIR tube and the stud? It's a tight fit getting a wrench in there. I was able to get an open wrench in there but didn't have enough leverage to even loosen it. I also noticed some frayed wiring going to the front shock to change the ride mode, but that's another issue.
Any help is appreciated.
Thanks,
Joe

[Cal55]

Originally Posted by LGAFF

Cam sensors can leak also from D/S

Thanks for the reply, I'll keep that in mind. My leak right now is on the passenger side, leaking from the exhaust manifold stud and the grommet on top possibly.
Joe

[1991ZR1]

I don't remember which, but it was either an open end wrench or a short adjustable wrench. Most likely it as the open end wrench for the leverage at least to get it loose.

[Cal55]

Originally Posted by 1991ZR1

I don't remember which, but it was either an open end wrench or a short adjustable wrench. Most likely it as the open end wrench for the leverage at least to get it loose.

Thanks, I guess I'll have to put another nut on the stud to lock the other one in place to remove the stud. If anyone has any tricks or suggestions in doing this I'd appreciate hearing them.
Joe

[LGAFF]

Sometimes if you are lucky the stud will back out when you turn the nut....I was not so lucky...be patient.

[Cal55]

Originally Posted by LGAFF

Sometimes if you are lucky the stud will back out when you turn the nut....I was not so lucky...be patient.

That would be nice! I didn't work on it today, hopefully next weekend. Thanks for the reply!
Joe

[5ABI VT]

I'm curious what do the manifold bolts look like? I'm doing a hurst and beam plates and took a peek up there.. On the rear most bolts there is one missing.. And in inside what looks like a bolt hole on the manifold I can see a flat head screw 'head' of a smaller bolt...

[1991ZR1]

Originally Posted by 5ABI VT

I'm curious what do the manifold bolts look like? I'm doing a hurst and beam plates and took a peek up there.. On the rear most bolts there is one missing.. And in inside what looks like a bolt hole on the manifold I can see a flat head screw 'head' of a smaller bolt...

The factory did not put bolts in all of the holes. The bolts don't look like anything special but they are non-magnetic. They go through a short spacer tube between the bolt head and the exhaust flange.

I don't know what you mean by inside.