Oil Themostat

[Sparticus]

Am fitting 2 oil thermostats....one in the gearbox (which i've installed) and the other in the engine sump. The masterplan was to put the themostat into the oil drainage plug and use a reducer fitting..... On further examination the sump drainage plug looks 1/2 UNC and the thread on the thermostat is 1/8 NPT (almost the same size but different pitch etc so can't fit a reducer)

Question is: How do i fit in the oil thermostat into the sump???? :S

Thanks
Si

[Sidecarbod]

Originally Posted by Sparticus

Am fitting 2 oil thermostats....one in the gearbox (which i've installed) and the other in the engine sump. The masterplan was to put the themostat into the oil drainage plug and use a reducer fitting..... On further examination the sump drainage plug looks 1/2 UNC and the thread on the thermostat is 1/8 NPT (almost the same size but different pitch etc so can't fit a reducer)

Question is: How do i fit in the oil thermostat into the sump???? :S

Thanks
Si

Do you mean "thermostat" or temp sender? A thermostat is a switch or valve with two settings, on or off, or open or closed. If you want to fit a sender to the sump and its too big to fit into the sump plug your best bet is to take the sump off and get a threaded boss welded on to it.

If for some reason you do mean thermostat then I aplogise in advance for being an ar5e!

Regards,

Pete

[wilf]

You would be better off monitoring your diff oil temps than the gearbox if you intend to thrash your car around a track. Many racing Cobras run diff oil coolers, but very few run gearbox oil coolers.

[Sparticus]

Oops, i meant temperature sender. I think the solution is to get a brass bit of bar and have someone turn it down and drill a hole through the centre and have the top with a 1/8 NPT female hole and then thread the bottom of it to the same size as the oil sump plug. The sectional diameter of the temperature sender is a couple of mm shorter than the thread so will give me more material when it gets down next to the external thread.

What do we think?

(sump is already full of oil and would be a pain in the ass to drain it all just and take it all off so i can weld bits to it).

Si

[Sidecarbod]

Originally Posted by Sparticus

Oops, i meant temperature sender. I think the solution is to get a brass bit of bar and have someone turn it down and drill a hole through the centre and have the top with a 1/8 NPT female hole and then thread the bottom of it to the same size as the oil sump plug. The sectional diameter of the temperature sender is a couple of mm shorter than the thread so will give me more material when it gets down next to the external thread.

What do we think?

(sump is already full of oil and would be a pain in the ass to drain it all just and take it all off so i can weld bits to it).

Si

I'm sure that your solution will work fine and as you say it saves having to take the sump off.

Brass is a good thing to make threads out of as it has a sort of self lubing quality to it.

Regards,

Pete.

[Clive]

Hawk Cars can supply a union which is a "Bolt through" in the sump. No welding, just drill and tighten nuts. Only drawback is you will need to take the sump off but it is an easy job.