Thermostat housing for 156thp - single or twin 2 pin plug?

[RCZKam]

Hey

Pretty much as above, I need a thermostat housing for a 2012 156thp (engine code EP6CDT)

I’ve read on there that the housings for the 156 originally had a single 2 pin plug and I need the short adaptor loom as the new housings now have two individual 2 pin plugs but the ones I’m seeing (eBay etc) are the same as the one I’ve just pulled from mine - single 2 pin plug?

Obviously I’m wanting to make sure I get the right one as it was a pain to remove but is the two individual 2 pin one an upgrade/superseded version or can I just pick up the single 2 pin as it was before? Has the upgraded one got a better thermostat or some magical power etc that I’m not aware of?

 

[Pedro]

They did upgrade the 156 housing & for the Citroen DS most of the PSA & BMW models fitted with these tanks suffer from premature failure as the seams split & the coolant disappears down the back of the engine which can mask the true reasons why the temp starts to rise the newer versions had different connections as plug ins came with longer tails also the bleed screw was changed for a new wiring setup next to the sensor as in photo also you must make absolutely sure you have the right engine code before buying as there are different versions I believe tank (B) is the one being supplied now

 

[RCZKam]

Ahh I see

Yeah my coolant keeps disappearing every few days (completely empty res) but dash gauge still rises to 90 which is a tad worrying

I’m guessing the original single 2 pin housings are still available for those that want a straight swap but my thermostat loom with the coolant sensor is a bit worse for wear and there are a couple of nicks in the wires so will look for the upgraded one (B) and grab a new adaptor loom



Cheers Pedro

 

[RCZKam]

Also my coolant level sensor (in the res) was unplugged and the plug end was gunked up with what looks like grease!

Probably because the previous owner grew tired of the low coolant warning keep coming up…

Will pick up a new in res level sensor as well

Hopefully this will also solve my AC issue which amazingly works when there is enough coolant

 

[RCZKam]

I’ve received a thermostat housing and have read on searches on here that there are two different ones so make sure you get the right one but no mention of what the actual difference is between the two?

I’m guessing it’s the outlet hose from the thermostat to the matrix? Am I right in thinking the 156 has a large plastic C clip and the 200 just slides on?








Does anyone have a part number for the correct one with the flange as all the ones I’m seeing on eBay etc (1336Z6) are all slide on

Cheers

 

[RCZKam]

My other option is to chop off the plastic clip end of the matrix hose and as I’ve got some pieces here to put in a hose joiner and new hose so it slides onto the thermostat

Don’t really want to bodge it but might help if the thermostat goes again as it’ll be easier to pick one up as these slide on ones are everywhere