AO Silver Member
Join Date: Nov 2003
Location: United Kingdom
County: Perth and Kinross
Re: 2 bleed or not 2 bleed???
Fill up with a 50/50 coolant mix. Flush the system entirely if you change the colour of the Anti freeze, because the latest OAT red/orange is incompatable with the older green.
Slowly fill up, and expect to need 4-6 litres even before starting the engine. Look at the radiator top corners. There may be a small slot headed plug which will assist bleeding only whilst filling up. I suggest when filled, leave the cap off and go in and have a cuppa. That will give it more time to self bleed, so it will probably need topped up before starting the engine.
Refit the plug and rediator cap. Start the engine and run to temperature at 2000-2500rpm once the initial chill is off the engine. It is a good idea to identify the heater hoses which go through the bulkhead. Whilst the engine is warming up, the heater hoses should become quite hot before the thermostat opens and the radiator hoses become noticeably warm. The top hose will normally become slightly warm. If these hoses do not become warm, that indicates an air lock. Look out for when the thermostat opens. The temperature guage should drop 10 degrees, and the radiator hoses become warm. The reservoir level may drop significantly. If so, slowly open the cap (beware of pressure) and top up the coolant. Run to full temperature and ensure the level is ok. Once the engine is cool again, recheck the coolant level and top up again if necessary.
If a gurgling sound is heard, the coolant is boiling. Stop the engine and do not remove the reservoir cap until the engine has cooled enough so there is no danger of coolant boiling when the pressure is released (coolant boils at a higher temperature under pressure).
Expect to to 3/4 of an hour for this, possibly more depending on experience (includes coffee time). You will need new jubilee clips or quick clip pliers to remove and refit the original ones. It is best to renew any clips which show any signs of corrosion.
[SIGPIC][/SIGPIC]Drive sideways- life's too short not to
Slip-sliding my way through winter. On four wheels and two.