12 replies to this topic

[nicklouse]

any one know of a OE part number for one of the above, all the part numbers i find do not state that they are a switch or just a sensor i am thinking GM does one so can check later but if any one know of one....

[Spider]

Nick,

 

I've just looked though around 100 of them, the only imperial threads I could find were 1/8" and 3/8" Gas threads, the others were Metric. It appears that 1/8" NPT for these is 'odd-ball'.

 

Are you locked in to 1/8" NPT?

 

I'd suggest if a change is possible to consider Metric and there's a huge range available.

[nicklouse]

have drill and Tap so anything is possible, that is what was in the part.

[Spider]

Next issue is finding one one with a 10⁰ differential !!

There are a few, but I think this one fits your ticket and has a second higher temp, switch

 

http://www.tridon.co...ches/333/TFS208

[nicklouse]

mm I think I will be sitting down with the local auto stores catalogues after seeing what the max hole I can put in this is. mm 16mm tapset anyone?

[Icey]

Most I found were M22 which is good as that's what's in my rad!

 

You can get surface mount ones as well if you don't want/don't have a tapped hole.

 

eBay is your friend though, bucket loads on there of all the flavours.

[nicklouse]

sure there are loads on Ebay but this is the type of think I like to have in hand, but I am thinking of turning the housing I have into a temp switch and drain plug housing.

[smurfomatic]

Some rad thermostats are M14 like the ones that fit in the Fletcher rad. Mahle do a range (TSW) that have 5 degree increments so you can probably find one that suits.

[nicklouse]

ok what i have currently decided on is to use this for two functions. the current hole will be a drain and the flat side opposite will take a Metric fitting thermo switch.#

[nicklouse]

well this has been a bit of a fuss.

this lot arrived on thursday

then today i had to get 

 but thats two taps i hear you say. yep the first one was undersize by about 0.25mm and the Sump plug is well the drain plug will be the same thread as the sensor was a little to far back in the housing 

will be fine as a drain

just need to drill and tap a new hole as fit

oh VW sump plug

 

[Spider]

Nice work Nick. I wouldn't worry too much about the switch being recessed in a bit, the fitting, being all aluminum will quickly follow the coolant temp with little lag.

[nicklouse]

true, but still going to add another hole on the otherside for the sensor. and use the current as a drain as it will be the lowest point in the cooling system. also i get to use the expensive tap for a second time.

[nicklouse]

bad tap

good tap

fitted. not fasten up

wiring done and comes on with thermo switch and can also be manually switched.

just need tidying.