Volvo

The coolant cap on my TAMD63 was flagged as incorrect on the survey when I purchased my boat. This was interesting to me because the cap looks like it is original. After doing a lot of digging, and questions with various diesel technicians, I discovered the surveyor is correct. Apparently, if you are using an external recovery tank, the coolant cap needs to have a rubber gasket on the top rim. If you don't have a rubber gasket, it can prevent the coolant from returning to the engine when it cools down. I checked the Volvo Penta parts diagram and apparently the original cap (even the replacement) does not come with this gasket. Possibly because the original design did…