Noise on One Cylinder, Sounds like a knock... Options

[sgetsiv]

The engine was noisy so I adjusted the valves. I also replaced the push rod tubes and used new Vitron seals. I thought I had valve noise but that wasn't the case.

I then isolated the knock to Cylinder #2 by pulling each spark plug wire. Using a stethoscope with a tube to listen, it was clearly an exhaust leak right at the head.

I have a set of Triad headers on the car so it should be pretty easy to pull the drop and check everything. Of course, this is also the head where I had two poorly repaired exhaust head studs. I retapped for 10mm and used step studs I got from Auto Atlanta.

The other common symptom I have is backfire on decel, of course. This is typical with an exhaust leak.

So hopefully it will be obvious when I pull the drop. I've already tried tightening the drop to get rid of the leak but I think something is messed up with the copper washer (which was annulled) or possibly the head itself.

Just thought I would post in case some one else was experiencing something similar.

Ya, I'm a newbie so even though I owned a 914 for 4 years back in the early 80's, I am relearning everything.

I'll post again once this is resolved or if I can't get it sealed.