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hornet

Member Since: 04 Jan 2010
Location: Western Europe
Posts: 361

Thread size cooling water Cylinder head

Does anyone know what thread size this is? It only needs to be drilled through and provides an ideal location (the warmest) to measure cooling water temperature coming out of the cylinder head. I guess some Ford-models have a sensor there, but I will not stick to genuine.

19th Jan 2023 4:30pm

Angus_Beef

Member Since: 30 Apr 2015
Location: Oslo
Posts: 434

2015 Defender 110 Puma 2.2 SW Corris Grey

Interesting. My 2.2 does not have a threaded boss there. Roaming around 🇳🇴🇨🇭

Last edited by Angus_Beef on 20th Jan 2023 12:54pm. Edited 1 time in total

19th Jan 2023 5:17pm

hornet

Member Since: 04 Jan 2010
Location: Western Europe
Posts: 361

Cost saving measure. I guess the 2.4 part woud fit anyway

19th Jan 2023 7:01pm

Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 1997

Interesting idea... so what’s the plan to use the input from the newly installed water temp sensor ?

Ps Given your question I’m assuming it’s already treaded. So it’s likely be metric, so having a look at the size and trying a couple of bolt sizes should give you the answer.

19th Jan 2023 9:09pm

hornet

Member Since: 04 Jan 2010
Location: Western Europe
Posts: 361

Yes, it already has a thread, but it doesn't seem to be metric to me. If necessary, i'll cut it to fit my needs. I'm basically interested in the water temperature, the temperature output via the CHT is calculated, which i find a bit suspicious

I already measure oil pressure and oil temperature, but i'm now planning to add a pyrometer (inside a intermediate mounting flange in front of the turbocharger) and the water temperature at the warmest point.
I still have a sports car that includes these measurements from the factory and i feel more comfortable there

20th Jan 2023 7:49am

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6604

2015 Defender 90 Puma 2.2 XS CSW Montalcino Red

Is it a boss for a sensor or a threaded boss for fitting a cover or mounting something else (not in the LR application)?

1988 90 Td5 NAS soft top

2015 D90 XS SW

20th Jan 2023 8:17am

hornet

Member Since: 04 Jan 2010
Location: Western Europe
Posts: 361

It's a threaded boss, the only additional work that has to be performed is to drill into the pipe ("open it") and mount an applicable sensor. I am convinced it is a FORD-application for a sensor, no cover etc.

I think it's best to do it on the workbench, one could do it in situ with engine running as well I think....would worry about the chips then.

20th Jan 2023 12:40pm

hornet

Member Since: 04 Jan 2010
Location: Western Europe
Posts: 361

Martin wrote:
Is it a boss for a sensor or a threaded boss for fitting a cover or mounting something else (not in the LR application)?

My fault, I found a picture that shows a cover mounted on that boss.

But still think it should work for a sensor

Edit: It is a standard M8 (M8 x 1,25 mm) thread and I wonder if it will show moreless correct temperature even withot connecting it directly to the cooling water.

20th Jan 2023 12:48pm

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