T1N coolant leak.

Any uk based sprinter gurus/wizards can help tracking problem down.
1l Coolant loss every couple of weeks.
Also coolant system seems pressurised when engine is stone cold.
Doesn’t seem to have any milky film either in oil filler cap or water filler cap.
Should I pressure test the coolant system?
Thanks

You certainly could pressure test the coolant system, but if you can’t find physical evidence of external leaks it’s likely that you have a bad radiator cap on the cheap side or a cracked head/gasket on the pricey side. If the van is otherwise running properly, not putting out excessive smoke, etc, try replacing the radiator cap with an OEM replacement and see if that gives a solution. Other wise it’s most likely tear down time.

Good luck