K Series EU2 Air Temp Sensor Thread Size

[revilla]

Does anyone have access to an EU2 air temperature sensor and can measure the thread size for me please? It's the green sensor that screws into a plastic insert in No 4 inlet runner that I'm after. I need to buy a plug to bung the hole when using an EU2 manifold on an EU3 engine. I thought it was M12x1.5 like the water temperature sensor but it's smaller, I think M10x something.

Thanks,

Andrew

[Jonathan Kay]

Is that NNK10001?

There are some on eBay that say it's "M10*1.5".

...

But now that I have a possible part number I found this thread which suggests both M10 x 1.5 and M10 x 1.25!

Jonathan

[revilla]

Thanks Jonathan. If RJ says he measured one and it was M10x1.25 that's good enough for me (Hi Regin ).

[revilla]

Ordered one of these, guess we'll know soon enough: https://www.a2stainless.co.uk/M10-x-1-25-Pipe-Plug_AICL3.aspx

[rj]

[oilyhands]

Pretty sure the thread is M10 x 1.5, when I attach the ai temp sensors to an airbox backplate I have to reform the thread to M10 x 1.25 with a die as the threads are too coarse for a regular M10 x 1.25 securing nut.

Oily

[revilla]

Oh ... Well I've got some M10 x 1.25 plugs in order already, so I guess I'll know one way or another shortly! Will report back. Thank everyone for your input.

[revilla]

Got the blanking plugs. They're a perfect fit, just finger tight all the way down the thread. So the insert on this manifold at least was M10 x 1.25.

[rj]

And I've double checked with the sensor I have: It fits in an M10x1.25 nut.

I do admit that it seems unusual on a K-engine having anything M10x1.25. For sensors I'd expect M10x1 or M12x1.5 for anything Rover-ish.

But... as we know the oil filter bracket has been re-cut to 1/8" NPT for the oil pressure hose when fitting a remote oil pressure sensor and the water rail is yet another story... (and my own even more so having a thread for the external water pump thermostat...)

[TomB]

What are doing?  Are you fitting a blacking plug and repositioning the air temperature sender?  

[revilla]

Nothing exciting I'm afraid ... Just using an older lower manifold with the IAT sensor drilling on an EU3 engine build that doesn't need it, so needed to blank it off.

[TomB]

Ah I see, I was wondering if something more interesting. Ive thought about moving the Air Temperature sender somewhere a) away from engine heat soak, and b) somewhere more representative of ambient air temperature.  But its one of things I've not done, and beside, the evidence from others who have experimented, is that it has minimal effect on the running of the engine