Originally Posted by bedajim
Any idea on the temperature and what is coming into contact with it, water, oil etc
Standard modern marine diesel, so charge air to raw water in one and coolant to raw water in the other. No idea what temp the charge air gets up to, but coolant will obviously be sub 100 deg (if it's above that the o-rings will be the least of my worries
Originally Posted by captnjack
Are they not available from the manufacturer in the correct hardness, material and size?
Yep, but at a price and with a current delay due to stock levels. £19 per ring seemed a bit steep to me