I am now the prod owner of a 300Tdi 1994
It's great to be able to see some of the work everyone is doing and my first job was to replace the bias plate.
I have a question for some of the seasoned pro's out there...
My discovery temperature gauge sits happily around half-way most of the time. If I drive it up hill (on the road even) it overheats in less than a minute. If I stop (and even at idle) the temperature starts moving back towards the middle again (slowly).
I have only noticed once mildly warm hot air come into the cabin (been on full heat both dials in a variety of positions). The time it game on it made a funny gurgle type noise then went cold again sometime later.
I check the pipes and particularly the top hose from the thermostat to the Rad and it almost suggests it has no water in it most of the time (and certainly when cold).
How can i figure out which of the possible problems:
Dodgy Water pump
I'm planning to flush the coolant tomorrow am and run a hose thru the head and rad. Some suggest rad core issues aren't obvious with a flush, and I have no idea how i can test if the water pump is working.
Am hoping to do it all myself but am pretty useless - ruling out the water pump would be great! P.s. the poor thing was completetly bare of oil when i picked it up - drank 2.5L to get to the half way mark so am expecting this to be head trouble due to neglect - done 150k if that matters.