radiator and heater bleeding

hi everyone what is the procedure for bleeding the rad on a 300tdi

first thing - replace the vent plugs on the thermostat housing radiator with household radiator bleed valves. About £2 each. Well worth the investment and it means yu can bleed the system hot.

The the cooling system is self venting via the expansion tank cap, there are no venting plugs only filling points one in on the thermostat housing the other on top of the rad, but you can get an air lock when refilling the engine with fresh coolent.

To prevent air locks which usually happen in the heater matrix but also can be in the engine and which will reduce the coolent flow around the engine (not what you want) fill both the thermostat housing and the rad, and when free from emerging bubbles, replace the plugs.

Turn the heater controls to hot and leaving the expansion cap off start the engine, if you bhave any air in the system then you will see bubbles rising, when that stops replace the cap and stop the engine and let the engine cool, then check your coolent level again.

thanks for the advice chaps.

have fun getting those plastic plugs out

hope they come out easier for you than they are doing for me right now

thats why i sed - replace em weith those nice brass ones from domestic radiators .

just changed the vent plugs for those made for domestic rads. bled the rad everything now running at the right temp. cheers mad. good modification.