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    Help. Bleed coolant on 2.0 tdi

    Need help bleeding coolant. Fill resivoir up to max let and after driving to get it up to temp the coolant is coming back out the overflow. How do you get rid of the air lock.

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    Quote Originally Posted by chucky121 View Post
    Need help bleeding coolant. Fill resivoir up to max let and after driving to get it up to temp the coolant is coming back out the overflow. How do you get rid of the air lock.
    Are you sure the air lock is not to do with ice ? If the coolant does not have at least 50/50 antifreeze there is every chance it may have frozen in one of the pipes.

    Run the engine with the cap off the reservoir bottle so that there is no pressure in the system. Keep an eye on the bottle and also the temperature gauge. If the temperature goes over 90 then switch off and replace the cap. When screwing the cap down it appears to be tight but if you stop first then you can keep turning until it 'locks'.

    Other than that you could drain the whole system and start again with the proper antifreeze mixture.

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    Coolant is 50/50. Will try and leave it running in the morning. Temp never goes over 90 so it is circulating

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    Quote Originally Posted by chucky121 View Post
    Coolant is 50/50. Will try and leave it running in the morning. Temp never goes over 90 so it is circulating
    Is there a possibilty you did not secure the cap properly ? If you didn't then the coolant would boil and overflow. System must be pressurised to achieve correct temperature without boiling.

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    Cap is on correctly. Was driving the car before and low coolant light come on. Temp was still at 90 so not overheating. Filled the resivoir back up and by the time I had got home the coolant was on the normal mark ( half way up the resivoir) will check it in the morning to see if it has dropped.

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    bypassing egr cooler

    has anyone bypassed the egr cooler on the 2.0 bkd? just replaced cylinder head since it was cracked, sometimes getting white smoke out of exhaust, (condensation maybe) and having trouble bleeding the coolant back through the system

    thanks

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    bypassing egr cooler

    Yup. Egr blank from ebay. Itll cause an engine light. And unless uve got other issues somewhere i wudnt do it without gettin the egr function mapped out properly. Mine was fubbered which is y i blocked mine
    2006 Audi A3 2.0 TDI S-Line 8P2 PD170 - Dolphin Grey Metallic - The problem child
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    Ok so I carnt just connect the two pipes from the egr cooler togeather and still run the egr?

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    Quote Originally Posted by chucky121 View Post
    Ok so I carnt just connect the two pipes from the egr cooler togeather and still run the egr?
    what two pipes are u on about?

    I blocked mine from where the EGR pipe meets the intake near the throttle body. i thought thats what u was referring to?

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    The two water pipes on the cooler at the back. It's not the egr that is causing bother its that I'm loosing water and think its the cooler leaking

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    Again today Ran engine up to operating temp. Never goes over 90. Replaced the cap after topped coolant up to level. Drove it home tonight and checked again after a good 15 miles and the coolant has dropped slightly. Looks like it coming out the overflow of the cap since their is coolant around the chassis leg.

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    Quote Originally Posted by chucky121 View Post
    Again today Ran engine up to operating temp. Never goes over 90. Replaced the cap after topped coolant up to level. Drove it home tonight and checked again after a good 15 miles and the coolant has dropped slightly. Looks like it coming out the overflow of the cap since their is coolant around the chassis leg.
    If you are sure the cap is on properly then it sound like you might need a new coolant tank.

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    Sure the cap is on. Turned it till it locked and can't go any further. Not sure why its doing this. Seems to be not loosing as much coolant as it did a few days ago. On Sunday the tank was jus about empty and now it's just below the half way mark. Just fitted a new cylinder head on to car so I know it's not gasket or anything. When I was giving the car some revs the water started spewing out of the tank when the cap was off. Does seen like an air lock. Even though you can see the water circulating.

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    Radiator get warm/hot? Do the heater blowers blow hot?

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    Yes heaters blow hot. Not seen fans cut in yet though.

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    bypassing egr cooler

    I think I'm having the same problem !
    So you can run without the egr cooler ?

    2.0 tdi 220 Quattro.....

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    Help. Bleed coolant on 2.0 tdi

    Similar issue on my car but heaters are very poor ! What was you thinking the issue could be Chris ?

    2.0 tdi 220 Quattro.....

    Bigfish tuning remap, S-line half Leather heated seats, Bose sounds, Elec' fold in heated mirrors, tyre pressure monitors, Charcoal roof linning, Mfsw,phone prep, 18" Speedlines, Dual climate, total open/closure remote windows,L.e.d rear lights, Ch/Lh lights,puddle lights,Cruise Ctrl, Ambient Interior lighting, footwell lights & it's a Quattro......

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    Ah ok, sorry mate thut u was on about the valve itself.

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    Not sure if you heaters aren't blowing hot. Mines blowing hot but pushing water out of the expansion tank and leaving the level low. Help!!!!

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    That's what I'm wanting to know. Surely an egr valve doesn't need to be cooled. If it is the cooler leaking I was thinking of just deleting it but still runing the egr valve. Surely some has had issues like this.

  23. #22
    Rick @ Unicorn Motor Dev.'s Avatar
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    No,

    you will cook the EGR valve and generally choke up the engine, it's not designed to have red hot exhaust gases fed into the inlet.

    Rick
    Unicorn Motor Developments. Bespoke Calibration and Remapping Services
    www.unicornmotordevelopments.com

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    Ok so identify if the cooler is leaking and if so replace it.

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    Help. Bleed coolant on 2.0 tdi

    I know expansion tanks are rife for failure ! Maybe an avenue to go down for us both.....

    2.0 tdi 220 Quattro.....

    Bigfish tuning remap, S-line half Leather heated seats, Bose sounds, Elec' fold in heated mirrors, tyre pressure monitors, Charcoal roof linning, Mfsw,phone prep, 18" Speedlines, Dual climate, total open/closure remote windows,L.e.d rear lights, Ch/Lh lights,puddle lights,Cruise Ctrl, Ambient Interior lighting, footwell lights & it's a Quattro......

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    or remap car and completly remove egr system
    Full Leather / heated Seats / 18" Speedlines / AP coilover kit / R32 Rear 310mm Brakes / window Tints / Auto lights / Xenons / Cruise control / R32 Front 345mm Brakes / Full milltek system / Led side lights / Bose / brushed aluminium inlays / panal filter / Full Egr delete / custom map with hot start fix / Hybrid Turbo / Sachs Racing clutch / 10mm Rear spacers / 10mm Front spacers / A5 LED number plate bulbs / Oil catch can

    233 bhp - 309 ft lb - 419 nm

    FLYWHEEL + HELIX CLUTCH KIT FOR SALE



  27. #26
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    cooland issues 2.0 bkd

    This is my 3rd post about this, can someone help??

    Just replaced the cylinder head on my a3 since it was cracked (early 2.0 2004). its all back together and running sweet just one issue, i cant get the fans to cut in at operating temp. the heaters inside stay cold, sometimes go hot for a bit but mostly cold, i can see that their is coolant circulating so just wondering if its badly air locked. cant even drive the car 10 miles without the coolant being forced out of the overflow on the cap, resulting in low coolant light coming on, car never overheats. left the car ticking over to get to operating temp with cap on and with out cap and its still not working, this morning i could here like a bubbling sound from the heater matrix when the heaters did blow hot, starting to give up now

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    I think it will be airlocked mate yes

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    yep airlock

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    best way to get rid of the air? i have had this running for a good wile, up to 90 on the temp sensor, heaters are blowing cold air sometimes hot, coolant just bubbles up

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    does the 2.0 bkd have bleed nipples?

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    think im going to put this car on ebay as damaged, still no luck have bypassed the egr cooler just to see if i can get the system bled, but the engine keeps pressurizing and spitting the coolant out, fans go between hot and cold, just wont bleed right cheap car if any one wants it, a3 se 2004 2.0 77,000 on clock, rest of the car is mint!!

 

 

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