Quote:
Originally Posted by Cliff.Harding
How much water/coolant does it take by the way?
|
Cliff,
First of all, the factory filled cooling systems with a 50% concentration of OAT antifreeze. If you want to change to standard 'blue' antifreeze (not OAT) the manufacturer recommends flushing the cooling system because the anti-corrosion additives in OAT and standard 'blue' antifreeze are apparently incompatible.
Also, some members believe that OAT antifreeze at 50% concentration may have a detrimental effect upon 'O' rings in the KV6 engine. Although there is no direct evidence supporting this theory, a reduced concentration of 33% should still be effective (well, it has been in my SD1 for the past 25 years!).
Secondly, with a KV6 you
must follow the MGR procedure for refilling as follows:
- Apply Loctite 242 to first three threads of cylinder block drain plug. Tighten to 20 Nm.
- Remove bleed screw from radiator bottom hose.
- Remove bolt securing expansion tank and raise as high as possible (approx. 125 mm).
- Fill cooling system keeping level at expansion tank neck until a steady stream of coolant is emitted from bleed screw hole. Fit and tighten bleed screw.
- Continue to fill expansion tank until level reaches neck and remains static. Refit tank to body, tightening bolt to 5 Nm.
- Press 'Econ' button to switch air conditioning off [this is to prevent the radiator fan from running continuously].
- With expansion tank cap off run engine at 1,500 - 2,500 rpm, filling as necessary to keep coolant level just below expansion tank neck. When level starts to rise, fit cap.
- Continue running engine at same speed until the radiator fan starts, then reduce to idle until it stops. [In practice this may not be achievable, in which case establish that the engine has reached above 90° by activating the IPK diagnostics.)
- Allow the engine to cool for at least 30 minutes and top up the expansion tank no higher than the 'Max' marker. If this is not visible, remove coolant until it is. [In practice, topping-up will be necessary three or four times after a journey.]
You'll need at least 7.5 litres of coolant.
Simon