TD4 Coolant sphere

MULDERKE · May 1, 2022

Hello all.
Topping up the coolant is becoming more regular. I can't find any leaks but noticed cracking on the top of the top up bowl. Could this be my problem? Any advice welcome. Also the best replacement and if still available. Cheers

MULDERKE · May 1, 2022

Pic.

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Arctic2 · May 1, 2022

Yes change the coolant reservoir, maybe get a new cap as well, also check the Y plastic coolant joint to the head. these can fail either the seal fails of the part it's self goes brittle and leaks.

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hd3 · May 1, 2022

https://www.advancedfactors.co.uk/expansion-tank---diesel-models-13955-c.asp

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andyfreelandy · May 1, 2022

Also, cracked tank lets in air and coolant could boil, then level goes down due to steam escaping.

110tim · May 1, 2022

I have also had a radiator leak, bottom n/s corner, assumed it was the hose connextion but a new rad sorted it out. Had to feel about to confirm the leak as you could not see it,the other possibility is the horrid little 'O' ring on the metal pipe that goes into the thermostat housing, again feel around the area to see if there is any dampness

MULDERKE · May 1, 2022

Thanks to all for your replies.
Very helpful as always on this forum.
I've the day free tomorrow so will give all the suggestions for the cause a look at. But will order a new bowl/ expansion tank as a matter of course.
Artic.. Am I right that the Y piece sit between the starter and the oil filter housing? Is it a major job?

Thanks again all.
Gary.

Arctic2 · May 1, 2022

MULDERKE said:
Thanks to all for your replies.
Very helpful as always on this forum.
I've the day free tomorrow so will give all the suggestions for the cause a look at. But will order a new bowl/ expansion tank as a matter of course.
Artic.. Am I right that the Y piece sit between the starter and the oil filter housing? Is it a major job?

Thanks again all.
Gary.

Hi Gary.
It resides just under the manifold, not an hard job, easier if manifold is removed whole including the manifold should take no longer than 40mins

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Three bolts and its off, then just undo the hoses clips fit a new one if it is that of cause.

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hd3 · May 1, 2022

MULDERKE
just fer info .. those 3 bolts are only torqued to 9 nm / 7 ft/lb
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MULDERKE · May 2, 2022

Hello all.
it goes, checked all the above mentioned. Had to use a mirror to see the Y plastic pipe, but as dry as a bone.
So, awaiting the new Res/fill up thing.
Who would think a few cracks would upset the system .
Nodge
Thanks for posting your info. Will keep for the for the future. Thanks.
Cheers all.
Gary.

Nodge68 · May 2, 2022

MULDERKE said:
Who would think a few cracks would upset the system

It's a pressurised system, so anything that prevents it holding pressure will cause issues.

MULDERKE said:
Nodge
Thanks for posting your info.

Wasn't me. It was Arctic2.

MULDERKE · May 3, 2022

WOOPS.
Apologies Artic2.
And thanks for your time on this.
Cheers.

htr · May 6, 2022

Re that cracked coolant tank, you could consider a VW coolant tank conversion.

MULDERKE · May 6, 2022

What a class job!
New coolant tank has arrived as it goes. Thanks for posting.
My coolant woes have now gone further, so a new Thread needed. Don't really want to part with this car.
Thanks.

TD4 Coolant sphere

MULDERKE

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110tim

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