Peter,

Thanks for the very valuable information...I know I didn't see anything that looked like the new heat shields.

Is the old seal composed of just the raised part of the bottom of the chamber - ~ 1/2" in diameter (about the diameter of the injector nozzle), with ~ 3/8" hole in the middle, and slightly raised.

Is it likely that having a second seal/shield will interfere with the injector's spray pattern now or sometime later?

What roadblocks would I run into if I decided to try and remove the old seals - e.g., is there a good chance I could crack something important...or will the seals just pop out harmlessly once enough torque is applied to remove them?

Is the use of a small slide hammer a good way to remove the seals?

Thanks for your help.

Robert