2016 T6 Transporter, loose Cooling System Part Identification

[Duncan Riding]

Good evening, Everyone. Your help will be appreciated ... I am having a cooling system fault investigated on my T6. A bottom hose was removed and this fell out. Does anyone know what this is, please? Thank you in advance.

 

[Dundee_Kev]

Looks like part of the thermostat

 

[oldiebut goodie]

^^^^^ WHS

 

[Duncan Riding]

It does, doesn't it. The thermostat has been changed and is a large plastic manifold with a rotating ball valve (not an old style poppet valve). So, the part that dropped out is not the thermostat (it is far too small anyway), but I would like to know what it is and what it does ....

 

[Pauly]

Isnt there 2 thermostats ?

 

[Pauly]

Better to be a piece of thermostat than a valve spring (although i think you would know if it was from the head !)

 

[Duncan Riding]

Agreed, Pauly. If a valve spring has got into the coolant circuit, I am looking at a slightly more significant failure mechanism .

I did not know about a second thermostat .... I will investigate!

 

[n10n]

Check out pages 17-19 from SSP 455 (attached).

This is for late T5 engines but I imagine it would be similar in T6.

 

[manfrotto]

does it have a part number on it anywhere?

 

[Duncan Riding]

does it have a part number on it anywhere?

Good question! I will look when I go to the garage.

 

[Duncan Riding]

Check out pages 17-19 from SSP 455 (attached).

This is for late T5 engines but I imagine it would be similar in T6.

Thank you

 

[Duncan Riding]

Isnt there 2 thermostats ?

Possibly 3, based upon the coolant circuit diagram you kindly sent me to ...

 

[Duncan Riding]

does it have a part number on it anywhere?

Sadly, no part number.

 

[Duncan Riding]

The coolant circuit diagrams seem to have 2 spring loaded non-return valves ... is there a chance that it is one of them ...?...

 

[oldiebut goodie]

Sounds like a likely candidate.

 

[manfrotto]

The coolant circuit diagrams seem to have 2 spring loaded non-return valves ... is there a chance that it is one of them ...?...

I was thinking that too, but looks more like a thermostat to me. Maybe put in some hot water and see if it does anything.

 

[Duncan Riding]

I was thinking that too, but looks more like a thermostat to me. Maybe put in some hot water and see if it does anything.

Agreed. This is definitely not the thermoelement & spring from the main thermostat, however, there might be a second (small) thermostat on one of the returns to the Coolant Reservoir ...

 

[manfrotto]

Looks pretty similar to this..

Thermostat, Type 1 Engines

Thermostat For:Type 1 Engines Engine cooling flaps thermostat. (65-70°c),the old wax style is no longer available, we now stock this modern version,it requires a very minor mod to bracket. Sold Individually Our Reference: 111119159A, 8114600100Row K119

www.buzzbugvwparts.co.nz

The one on the link is not from a T6, but there could be one on the van somewhere other than the main thermostat?

 

[Duncan Riding]

This coolant circuit isn't right - it has an old style thermostat (not the swivel ball type) and it has an intake charge cooler (mine is ATACC) - but, we are looking for 1/ a second thermostat and/or 2/ any spring-loaded non-return valves. I do not have a PDK gearbox, so do not think that I have a gear cooler and a 3rd thermostat.