Slightly off topic for here, but got to be worth a shot!
Been looking at an overheating/over-pressuring TD5 engine on a 1999 Disco - It seems to be putting oil into the coolant, but not the other way round. Was initially suspected to be the head gasket, but it appears the td5 has an oil cooler mounted on the side of the block that has 2 o rings that over time stop sealing effectively, this allows the oil to seep out into the coolant.
Trouble is, I can't seem to find a part number or size for these o rings - Microcat doesn't show them as a seperate part, I've arrowed the ones in question in the attached screenshot.
Anyone know of either a specification for them, or a part number? The one labelled 8 is ERR7098, but this only shows a qty of 1, suggesting its not that?