While Replacing Thermostat housing on 97 xk8 Somehow cracked that round end cover type disc plastic part attached to the intake manifold right to the left of the Thermostat housing............GOING CRAZY!!!!! I can find the seal for the CAP but nowhere can I find the end cover cap for which the seal is necessary. The seal part JANCA3015BA.

 

JAGBITS one of the forum sponsors lists blanking plates for the intake manifold. Go to there web site and fill out a parts request. Dan will get back to you right away if they don't have new he may be able to get you a used one. Might be helpful to post a photo of the cracked one. Some of the members might have better luck identifying what you need.