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1991ZR1 · 06-17-2013

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.

06-17-2013	#16
1991ZR1 Join Date: Sep 2005 Posts: 90	Re: Exhaust Manifold Stud Oil Leak 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.