E.C.U. temp sender

[tuxman]

Injection project is going well and Dr Dave has asked me to fit a temp sender in the engine water jacket so the ecu can tell how hot the engine is anybody got any ideas where i can put it ? i have not got anywhere on the inlet manifold and wondered if there is a spot on the block ! SIMON

[eliot]

ive got mine near the thermostat in the inlet manifold. The one for the gauge in the car is screwed into the cylinder head,and there's one either side. Yours may have a blanking plug screwed in it.

eliot

[pb3]

You don't want it in the block Simon, it should be the heads or intake manifold, ie at the top of the engine. Where do you have it currently? In realality the ECM will not need to know the exact temperature, it will only use it for controlling warm-up fuel enrichment and possibly timing adjustment. But YOU may want to know the real temperature for peace of mind displayed on your gauge!

[tuxman]

Hi Eliot , i,ve got my heater supply out of the other one on the inlet manifold !!! there is 2 opennings on my water pump the heater returns to the top but the bottom one has a blank in it ,are these 2 holes flow and return for heater ? can i move the heater supply from the inlet manifold to the water pump ? simon

[CanAm Dave]

Hi Simon

I'd go for fitting it in one of your cylinder heads. It will save messing with your heater hoses. Just remove a blanking plug and fit.

[tuxman]

ok there are 2 blanking plugs in the side of the heads but they are going to be too big ,the sender thread is m12 -1.5 anybody know were i am going to get a adapter from and what thread are the heads ? simon

[steve_d]

Just drill and tap a new hole in the side of the thermostat housing.






Steve

[CanAm Dave]

What heads do you have fitted Simon? The blank sizes vary from head to head.

You may have to adapt something as americans don't do much metric!

Dave

>> Edited by CanAm Dave on Friday 20th January 23:26

[tuxman]

ok steve good idea can see there is a good spot only thing is inlet manifold has just come back from paint shop all finished !!!!

[gdr]

The head plugs are probably 1/2" NPT - you better check though, may by 3/4" NPT. I have not seen an NPT x metric adapter but they may well exist off the shelf. If not, you can get a suitable male-female NPT reducer, say 1/2" x 1/4" then drill it out and tap for the M12 x 1.5 sender. I have the EFI sender in head, used a 1/2" x 3/8" NPT reducer to get GM sender to fit.

[tuxman]

the blanking plug is 3/4 of a inch across with a square drive to undo it , bit odd don,t know how i am going to get it out although i must have put it in when i built engine . simon

[CanAm Dave]

Hi Simon

If its a square drive then you should find that an oil drain plug key will fit it. Even Halfords sell those!

Dave

[tuxman]

ok dave will nip to halfords to get one . the heads are edelbrock rpm performer .will set chris at W.A.S.P. onto the job of finding a adapter plug . simon

[CanAm Dave]

There are different oil drain plug keys, so measure the square in the blanking plug. The Sykes set I have has one that fits mine.

[CanAm Dave]

The blanks in Edelbrock Performer RPM heads are 1/2" NPT. I'd do like George says and get a 1/2" to 1/4" NPT adapter and tap it to M12 x 1.5mm. You can get NPT to metric adapters but I don't think you will do it in one step, you you end up with two adapters which is not great.

NPT threads are a bit odd as they refer to the pipe I/D not the thread. So don't worry about the size of the blank you measured.

Dave

[eliot]

My sensor is here:
www.mez.co.uk/dcam/11190002.JPG

We made an adapter up and welded into the manifold.

[tuxman]

ok guys i want a 1/2"npt to 1/4" adapter.......were the hell do i get one of those from ? the guy a demon tweeks thought i was talking in some strange vocab !!!! simon

[pb3]

I have found that ETB Instruments are great for that sort of thing at www.etbinstruments.com/ speak to them directly.

[gdr]

Go to thinkauto.com, they have online catalog or call them Monday. p/n from Thinkauto is FBM2140.