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Old 01-06-2019, 10:24 PM   #1
golddayton101
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Default OEM 240 Oil Temp sensor

I ordered a new oil temp sensor for my 240 and was wondering where it hooks up to? The PO put a normal drain plug when his sensor stopped working.
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Old 01-06-2019, 10:41 PM   #2
hiperfauto
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The sensor replaces the drain plug.



There should be a black wire that connects to the sensor that runs to the back of the gauge.

http://www.240.se/litteratur/3-38-13a.pdf

Where did you find the OEM sensor?
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Old 01-07-2019, 01:00 AM   #3
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Between the oil filter and the water pump on the passenger side of the the red block.
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Old 01-07-2019, 02:45 AM   #4
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Quote:
I ordered a new oil temp sensor for my 240
Quote:
Originally Posted by Mr. V View Post
Between the oil filter and the water pump on the passenger side of the the red block.
......is where we find the oil pressure switch, yes?
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Old 01-07-2019, 10:09 AM   #5
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I’ll check behind the gauge and see if the wire is tucked behind.
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Old 01-07-2019, 12:43 PM   #6
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Quote:
Originally Posted by MasterBlaster View Post
......is where we find the oil pressure switch, yes?
Oops, yeah: my redblocks don't have an oil temp sensor, only an oil pressure sensor: my bad.
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Old 01-08-2019, 02:47 PM   #7
golddayton101
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Quote:
Originally Posted by hiperfauto View Post
The sensor replaces the drain plug.



There should be a black wire that connects to the sensor that runs to the back of the gauge.

http://www.240.se/litteratur/3-38-13a.pdf

Where did you find the OEM sensor?
Local Volvo shop had one NOS.
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Old 01-08-2019, 03:03 PM   #8
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How much did it cost? This guy was asking over $275 for a NOS sender.

https://www.ebay.com/itm/Volvo-240-2...frcectupt=true
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Old 01-08-2019, 09:19 PM   #9
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The pic of the sensor looks like it is too narrow to thread into the bottom of the oil pan, to take the place of the oil drain plug.

The pic looks a look like a water temp sensor.

Hmmm.
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Old 01-10-2019, 12:40 AM   #10
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Quote:
Originally Posted by golddayton101 View Post
Local Volvo shop had one NOS.
Nice score.
Wire routing varied since these were all dealer/shop/owner installed. May have to crawl under there and search for an unplugged single spade connector that doesn't look like it belongs. Or trace it from the gauge. I think I ran mine down the firewall and then over to the oil pan via some zip-ties on the lower tie bar. Probably should have gone down the intake support bracket instead.

Quote:
Originally Posted by Mr. V View Post
The pic of the sensor looks like it is too narrow to thread into the bottom of the oil pan, to take the place of the oil drain plug.
The pic looks a look like a water temp sensor.
The picture looks exactly like the one I have in the oil pan of my car. The flats are slightly smaller than the original drain plug (25mm). I can't remember for sure but I think the oil temp plug is 19mm. And it is a big heavy unit. Still working fine a decade later.
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Old 01-10-2019, 01:37 PM   #11
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Quote:
Originally Posted by neptune View Post
Nice score.
Wire routing varied since these were all dealer/shop/owner installed. May have to crawl under there and search for an unplugged single spade connector that doesn't look like it belongs. Or trace it from the gauge. I think I ran mine down the firewall and then over to the oil pan via some zip-ties on the lower tie bar. Probably should have gone down the intake support bracket instead.


The picture looks exactly like the one I have in the oil pan of my car. The flats are slightly smaller than the original drain plug (25mm). I can't remember for sure but I think the oil temp plug is 19mm. And it is a big heavy unit. Still working fine a decade later.
The oil drain plug should be 3/4-16.
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Old 01-10-2019, 03:45 PM   #12
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The oil drain plug temp sensor has the same 3/4 16 thread but the hex flats are only 22mm instead of 25 aka 1" like the stock plug.
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Old 01-14-2019, 01:42 PM   #13
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I’ll look behind the gauge and see if the wire was left there.
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