MK3 HELP PLEASE

[Andybhoy]

Hi there I need to remove my rear subframe to do the bushes just wondering if anyone has any step by step help for me, thanks.  Also looking to see how to do a brake fluid flush and also a coolant flush and if I need to bleed the cooling system at all when refilling. Thanks. 

[Tdci-Peter]

1 hour ago, Andybhoy said:

Also looking to see how to do a brake fluid flush and also a coolant flush and if I need to bleed the cooling system at all when refilling.

There are two critical points in a brake fluid flush:

1 - Try not to shear off the bleed nipples. They can be well corroded in if not used for some years. Use a good socket with a tee bar handle if possible to avoid putting side force on the nipple. Be prepared to take some time. Penetrating oil may help a little, once it starts moving, but is not a magic cure. Judging the right force, & combining a steady force with moderate impact can help.

If really obstinate, getting the caliper off the car and into a vice at working height can help, with some heat for the caliper & freezing spray on the nipple. If the nipple is really jammed, or breaks, a replacement caliper is probably needed.

2 - Make sure the reservoir level does not drop too low. Air in the master cylinder is a pig, and air in the ABS may need a special procedure via the OBD socket to bleed it. A bleeding kit can help here.

On the cooling system, there are usually two small vent hoses, one from the top of the radiator, one from the the engine, usually by the thermostat, back to the reservoir. When draining the system, remove these hoses (one end at least), check they are clear and empty of coolant. Replace them, then re-fill slowly in stages, allowing air to come back up the vent hoses at each stage. If coolant goes into these hoses from above, it might cause an airlock. If they are clear, the system should refill ok. Possibly apart from the line through the heater, and that should fill once the engine is running.

 

 

[iantt]

as for bushes, you can get a bush removal/ fitting tool that doesnt require subframe removal .