Coolant pipe O ring sizes. I've been buying new pipes just to get the sizes to save having to buy a new pipe. This is the list I have so far. These are listed as internal size and cross section Main stat to bottom rad hose, rad to engine block flange, all 4 are 38x4mm https://www.ebay.co.uk/itm/143922380690?var=443186281420 Block flange to aux water pump 22x3.5 (same size for the aux pump end) https://www.ebay.co.uk/itm/293305917660?var=592170111096 Gear box heat exchanger 16mm x 3mm https://www.ebay.co.uk/itm/362934461438?var=632074582767 EGR stat to cooler 19x2.5 (high temp O ring) https://www.ebay.co.uk/itm/363307640806?var=632513985460 Hard pipe connection on the front of the engine for the fitting running to the coolant tank (with a T dropping to the box heat exchanger on auto’s) is 21x3mm https://www.ebay.co.uk/itm/141455807131?var=440603743906 (picked Viton but NBR is the default material) I’ll add more as I buy and size them.
