Thread: Overheating TD5

buggered expansion tank cap.?
when was the thermostat last replaced?
may be sticking, restricting proper water flow, causing the hot running and if the cap is faulty the expansion tank might not be "expanding"?

cheers phil

Originally Posted by discowhite

buggered expansion tank cap.?
when was the thermostat last replaced?
may be sticking, restricting proper water flow, causing the hot running and if the cap is faulty the expansion tank might not be "expanding"?

cheers phil

OK, time too get it checked, thanks Phil.

Baz.

I will start by saying Yes you could have done some serious damage......BUT do all the tests first. I say do the tests because my GU was getting bubbles in the coolant about a year ago....all the experts were saying head gasket or head (I can understand that as it was showing classic symptoms of a dud head). BUT when I explained that it had been doing it for around 40000kms they still insisted on pulling the head for a better look. In the end West End diesel in sydney took the time to do all possible tests for me, Pressure test, leak down test, co2 test ect before going to the expense of pulling the head off, sure the testing cost me around $300 BUT it saved me around $2000 cause it wasn't the head at all.
Under load the plastic header tank opened up a little around the seam let some coolant out, then sucked some air in, when the car cooled down the air was trapped in the system apearing as bubbles in the coolant.
So maybe do some tests first thats all I am saying

Might be worth checking
Davy

it might also be the heater core taking coolant back in if youve draned it properlyduring a service. its a bugger to get to play the game in a deefer. but I wouldnt have expected it to take 4 months to sort itself.

the shop that did the testing did they use a petrol combustion gas sniffer or a diesel.

diesel ones will give an iffy reading on petrol and petrol ones generally wont even register if sniffing a diesel engine.

the hi falutent routing of the td5 cooling system makes it hard but not impossable to check the expansion tank for bubbling try running it at high idle while using a mirror on a stick to eyeball the inside of the expansion tank.

In case you're not aware, to properly fill and bleed the D2's cooling system the expansion tank must be removed from its bracket and raised.

Greame,, if you have any expertise in this area,, please write a "How To" for the D2 and I'll add it to
Common Threads

Originally Posted by Graeme

In case you're not aware, to properly fill and bleed the D2's cooling system the expansion tank must be removed from its bracket and raised.

Yes i did this when i last renewed my coolent.

Baz.