muso55

Sorry, I just noticed part of your advice,direction of flow etc. I never fitted it, that was planned to be done over this coming weekend. All I did was take it out of the box and tested it in advance.

Hi, Many thanks for the reply, yes I have seen this video before,and it was best for information on testing a new unit with cold water, and stopping the flow through.And also the old unit not closing off. I can now confirm that my brand new unit is faulty. It's stuck permanently in the open position allowing cold and hot water to pass through freely. I'm so glad I decided to test the unit,before going through the hassle of fitting, and then finding out,there's no change as to the slow warm-up of the engine. And highly possible then doing the big job of main thermostat. Last night I stripped down the brand new unit. The brass thermostat has a small steel rod, and it was sticking out about 1/4inch. This was not allowing the spring to force the stat body against the abs outlet inner flange and seal off any water flow. I then forced the steel rod back into thermostat, just to the point where in sits,and also causes a seal. I put the unit back together,tested cold water and closed,hot water,it opens. I must have done the test at least 20-30 times,and it's now working as it should. However, I'm still concernd it might fail again.I've been in touch with the supplier, explained as above,they apologised and are posting a replacement. So happy days. Thanks

I have just received a replacement DSG thermostat, after experiencing the dreaded slow engine warmup symptoms and dropping temperature gauge reading. I was due to replace the stat this weekend however, I'm now totally confused. Most posts indicate that the thermostat sticks in the open position, allowing full flow through the abs tube. I took the new thermostat out of its packaging to check any damage etc. I noticed I could blow with ease though the unit. I then boiled the kettle and submerged the unit in hot water. the tubed then closed off, and restricted the flow through the unit. 1. So this unit cold, allows flow through it. 2. when the stat heats up, it closes off flow. I dont want to fit this unit, only to find out it is faulty. Many thanks of any advice