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> What sensor is this?
dante giacosa
post 25th March 2018 18:03
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With reference to a former topic on additional instrumentation, and the adaptors necessary to interface the sensors with the engine block, can someone tell me what the sensor depicted in the picture below is..?

I am referring to the blue-backed single crimp-tab-output sender, below & behind the custom thread adaptor, which is the subject of the picture itself..?

I think this must be a PH 1 thing, as its blanked off on the PH 2.

Am I right in guessing this a coolant sender for the dash instruments themselves..?

Thankyou

(Credit & thanks to Desperado, for the original picture)

This post has been edited by dante giacosa: 25th March 2018 18:08
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Desperado
post 25th March 2018 20:40
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http://www.alfa145.com/upload/Alfa145Manua...016v%201970.PDF

Page 15 shows it as both gauge temp and warning light, theres two terminals on it. [one at 90 to the other]

I dont know where the ECU one is but its labelled as S7 and its detailed in the ecu/injection manual pdf....in that pdf S7 is in the same area.

I'm familiar with the 2.0TS 145 - all the TS are similar?? not sure...


QUOTE(Desperado @ 25th March 2018 21:39) *
http://www.alfa145.com/upload/Alfa145Manua...016v%201970.PDF

Page 15 shows it as both gauge temp and warning light, theres two terminals on it. [one at 90 to the other]

I dont know where the ECU one is but its labelled as S7 and its detailed in the ecu/injection manual pdf....in that pdf S7 is in the same area.

I'm familiar with the 2.0TS 145 - all the TS are similar?? not sure...



edit!!

see that green sensor terminal in the foreground, that might be the ecu one!


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dante giacosa
post 25th March 2018 22:20
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thanks Desperado-

That's terrific; I just wanted to confirm it was in the coolant gallery.

Incidentally; here's a question- I had that M10 x 1.25 blanking plug out tonight- the one that has the thread-adaptor in, in that picture, and was surprised to see that oil didn't come streaming out...?

Has my oil level reached a critical-low, or does the surface of the blanking plug only see oil when the galleries are under pressure..?
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Desperado
post 26th March 2018 07:31
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Yes. Oil drains down into the sump.


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dante giacosa
post 26th March 2018 08:54
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brilliant-

'I know everything' now...

thankyou


although I am disappointed to realise that my Intermotor 155 oil-pressure sender can't be 'that' direct a replacement for the standard part, as the threads on it are indeed M10 x 1.0.

Even though the pressure sender fits on the rear of the block (where we have the low-pressure switch)- I'd bet anything that all the tapped M10 positions on the block are x 1.25 thread, NOT x 1.0.

oh well, adaptor time...
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JeremyG
post 27th March 2018 09:00
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QUOTE(Desperado @ 25th March 2018 21:40) *
http://www.alfa145.com/upload/Alfa145Manua...016v%201970.PDF

Page 15 shows it as both gauge temp and warning light, theres two terminals on it. [one at 90 to the other]

I dont know where the ECU one is but its labelled as S7 and its detailed in the ecu/injection manual pdf....in that pdf S7 is in the same area.

I'm familiar with the 2.0TS 145 - all the TS are similar?? not sure...
edit!!

see that green sensor terminal in the foreground, that might be the ecu one!


Yes, if that's a Ph1 alloy-top engine, then the sender for the temp gauge is the one at the back in your picture, screwed into the block; the sender for the ECU sits in the thermostat housing (the green socket at the front of your picture).

I believe the Ph 2/plastic cover motors have a single sender unit on the thermostat supplying both gauge and ECU.

This post has been edited by JeremyG: 27th March 2018 09:04
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dante giacosa
post 27th March 2018 10:38
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thanks Jeremy G,

that's my understanding too


for bonus points; can anyone conform that M10 x 1.25 is the thread pitch for both PH 1 & PH 2 engine blanking plugs in this position-

They wouldn't change the block casting between phases would they..?
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Ganz
post 29th March 2018 21:39
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The oil pressure sensor, the one in silver on you pic is an adaptor. It is male M10 x 1.25 pitch thread with a female M10 1.00 mm pitch thread.

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I had to have mine specially made up by a local engineering firm who made me two.

This post has been edited by Ganz: 29th March 2018 21:39


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dante giacosa
post 6th April 2018 13:14
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good photography Ganz-

sorry I missed that at the time...
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