Leaderboard

It's there strictly for water management (by design, it can't contribute to sealing off exhaust gases from the cabin because covers only the top and sides of the hatch opening, while remaining completely open to the outside at the bottom). If your Z is a later-model 240 (where there are no vents on the lower hatch surface), the most likely culprit will be your main weatherstripping ("the large weatherstrip that's been installed years ago"). It may have lost some of its original shape after years of living 99% of its life in a crushed state while the hatch is closed. IIRC, some owners also found that the gasket around their taillights housings had deteriorated, allowing exhaust gases to enter the cabin through the rear panel. If your Z is an earlier-model 240 (vents on the lower hatch surface), that's a whole different (and more challenging) ballgame. There are several threads on the CZCC site that discuss problems (several) and remedies for this design.

Happy Thanksgiving to the Z family!!! I am grateful for this group!

My new neighbors are smoking turkey legs today. I'm about to go introduce myself.

Are you talking about #21? You could probably find those in the Dorman section at a local parts store.

Happy Thanksgiving!!! Fire up those ovens... I'm smoking some turkey this year... ;)