Bleeding air lock

Hi
I know this sounds basic but what is the best way to bleed my water system on 2001 td5 im a bit of a basic diy so help running through whole procedure would be a good help, the cars header tank cap needed replacing as faulty lost water through overflow i believe got new cap but would like advise as to how to do correctly

You could download a copy of RAVE - Its all in there.

• Undo the bleedscrew in the top hose
• Pull the header tank up out of its mounting and raise it 4"
• Add 50/50 mix of OAT coolant and water until it flows nicely out of the bleedscrew with no air bubbles
• Check for leaks
• Bleed it a bit more for good measure
• Fit bleedscrew and tighten loosely
• Start car
• Check again that there are no air bubbles around bleedscrew
• Top up to level
• Fit header tank cap
• Refit header tank into mounting
• Run car up to temperature
• Check for leaks whilst coming up to temp
• Allow to cool
• Check level
• Top up if required
• Use car and check level daily for first week until level stabilises

TONY

Many thanks Tony a quick question should the hoses still be fairly soft to squeeze when up to temp or hard?

gazzab said:

Many thanks Tony a quick question should the hoses still be fairly soft to squeeze when up to temp or hard?

Click to expand...

You should be able to compress them fairly easily. They should not feel hard or like the rubber has 'gone off'

T

I'm sure Hedgehog is dead right, but I've found if you unscrew the expansion tank cap a bit it pressurises the system and water (and bubbles!) will flow from the bleed caps. When it's running clear tighten the expansion cap and then the bleed nuts. I do the thermostat / top one 1st then the one on the rad, 21mm socket required.

Also, well worth downloading the Rave