After I put in my new heads, I've developed a small leak that seems to be coming from the back on the passenger side head. I've used both rubber washers with high temp rtv and tightening the bolt a few times, but still I have a leak. Any ideas?

 

I did not use any rtv with the seals on mine and no problems yet. Maybe try getting new seals and putting them on with no rtv. But make sure to clean surfaces good.

 

No RTV should be used or needed.

 

well that seems like the solution right there.

 

yep no rtv... Make sure your using the right head seals.. There are other seals that will look like they will work but will leak.. Just make sure they are the correct part and undamaged (if u installed your old ones or used ones)