SuzukiSavage.com - Oil temp sender

Armen

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Oil temp sender
09/19/16 at 18:48:55

Took the hint about the oil galley blanking plug on the lower right side of the motor. 14x1.25 thread.
Had a slug of hex aluminum around.
Bought a VDO oil temp sender.
Sender has 1/8" NPT pipe thread.
A bit of drilling, tapping, machining, cutting threads, and Voila!
Using BMW crush washers because they are real narrow, and won't stick out on the sides

Next gag is to convince the LED fuel bar gauge on the new speedo that the resistance it is reading is 'Fuel level" not something crazy like 'oil temp'.

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Armen Serious Thumper Offline Half-Witted Wrench-Jockey from Jersey Posts: 1452	Re: Oil temp sender Reply #1 - 09/19/16 at 18:49:59 Did I miss the pic in the first post?
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SavageMan99 Senior Member Offline SuzukiSavage.com Rocks! Posts: 391	Re: Oil temp sender Reply #2 - 09/20/16 at 09:00:45 Was, no JB Weld?
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Kris01 Serious Thumper Offline Eat, sleep, RIDE! Posts: 3767 Tennessee Gender:	Re: Oil temp sender Reply #3 - 09/20/16 at 19:27:43 Does the oil pressure sender use the same range of resistance as a fuel gauge?
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Armen

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Re: Oil temp sender
Reply #4 - 09/21/16 at 02:48:55

Hey Kris,
The gauge is a Koso speedo/tach/everything with a 6 bar LED fuel gauge. You have a choice of resistance ranges to use, depending on what your fuel level sender does. IIRC, there are 100, 250, 510, and 1200 ohm ranges.
The oil temp sender is a 0-300 degree unit.
My thought was to connect everything up and try the different resistance ranges until I find the one that puts the LEDs in the most useful range.
Hopefully I won't be seeing 300F, so it'd be nice if the gag maxed out at less than that.
I guess I could throw the sender in a pot of boiling water with a meter attached, and monitor the water temp with my IR meter and take lots of notes.
Or I could just put it on and try the different resistance ranges.
Cool

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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28886 L.A. California Gender:	Re: Oil temp sender Reply #5 - 09/21/16 at 07:18:01 not gag... gage or gauge. You should try it with a voltmeter 1st. temperature probes are usually bimetallic... and put out voltage. you don't want to screw up your gage.
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Armen

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Re: Oil temp sender
Reply #6 - 09/21/16 at 07:20:34

From Dakota Digital (another maker of gauges)

300F
1000 ohms @72 F
150 ohms @160 F
100 ohms @ 183 F
75 ohms @ 200 F
50 ohms @ 226 F
20 ohms @ 296 F

400F
2,500 ohms @ 72 F
150 ohms @ 212 F
75 ohms @257-259 F
20 ohms 360 F

Wes Case
Dakota Digital
4510 W 61st St N
Sioux Falls, SD 57107
Phone: 605-332-6513
Fax: 605-339-4106
wes@dakotdigital.com

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Armen Serious Thumper Offline Half-Witted Wrench-Jockey from Jersey Posts: 1452	Re: Oil temp sender Reply #7 - 09/21/16 at 07:26:42 'Gag' like 'Thing'. Like 'sight gag' or act, or stunt.
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Kris01 Serious Thumper Offline Eat, sleep, RIDE! Posts: 3767 Tennessee Gender:	Re: Oil temp sender Reply #8 - 09/21/16 at 17:51:07 verslagen1 wrote on 09/21/16 at 07:18:01: temperature probes are usually bimetallic... and put out voltage. It's technically a thermocouple but most people understand "sender" better.
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Armen

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Re: Oil temp sender
Reply #9 - 09/21/16 at 19:37:57

I think we are talking about two different gizmos here. The VDO cylinder head temp gauge that I ran on my Airhead in the 70's and 80's used a bimetallic ring in place of the spark plug gasket/crush washer. It produced voltage.
The VDO oil temperature sender I have is a different construction. I had an extra (not VDO) sender, and cut it open to look. Def does not look like a bimetallic thermocouple. This type of sender varies resistance with temperature.

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Temp_sender.JPG

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mjs3790225 Full Member Offline Finally making a presence! Posts: 103 Orlando, Fl Gender:	Re: Oil temp sender Reply #10 - 09/22/16 at 17:16:53 That red thing looks like a thermistor. Probably a Negative Temperature Coefficient one. NTCs have a base resistance at room temperature, but as temperature increases that base resistance decreases. They come in lots of different values and ranges. You can probably find one that works well for your gauge no problem.
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Kris01 Serious Thumper Offline Eat, sleep, RIDE! Posts: 3767 Tennessee Gender:	Re: Oil temp sender Reply #11 - 09/22/16 at 19:39:08 I've used mouser.com and digikey.com when I needed something.
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