So I’ve got a 71 fj40 with sbc350. The oil pressure and water temp gauges aren’t working on it. How can I determine if it’s the gauges or the sensors on the motor itself. Also it has a silver speedo gauge that’s not correct for my year or is it?
1971 fj40 oil pressure water temp gauges
- Thread starter gasser78
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Here's a thread with the knowledge you're looking for—> Stock gauges w/ SBC
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- #4
Thanks I also have a painless harness does that make a difference? I didn’t do the install but bought it that way without the two gauges working. I’d love to get a Dakota setup but saving for that now so just want the stock gauges to work for the time being
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I would think the painless would be fine. I wonder if @Downey has those oil/water sender adapters in stock.
The temp sending unit adapter you can use on your Chevota is Toyota P/N 90404-16160 (if still available), or McMaster Carr #9151K96.
For Oil sending unit you can merely use all 1/8"NPT fittings from your local parts store. You can screw metric Landcruiser sending unit into the 1/8"NPT threads (with thread sealant), but you can not screw 1/8"NPT threads into the Landcruiser engine.
For Oil sending unit you can merely use all 1/8"NPT fittings from your local parts store. You can screw metric Landcruiser sending unit into the 1/8"NPT threads (with thread sealant), but you can not screw 1/8"NPT threads into the Landcruiser engine.
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This is your Sensor Union , and Correct Electrical Connector terminals & Correct OEM color coded Tracer strip wires colors schemes
OEM TOYOTA Cylinder Head Coolant Temperature Sensor UNION Nut 90404 Fits ALL F & 2F Engines 1/75 -1987 FJ40, FJ55, FJ60 - VintageTEqParts.com
OEM TOYOTA Cylinder Head Coolant Temperature Sensor UNION Nut - 90404 - Factory Pre-Lubed w/ Lochtite Type Green sealer - ...
vintageteqparts.com
( Single Wire Type ) TOYOTA Oil Pressure Sending Unit Sensor Switch Connector Wire Harness Repair Kit - VintageTEqParts.com
TOYOTA Oil Pressure Sending Unit Sensor Switch Connector Wire Harness Repair Kit Fits 1964-1990 FJ40, 55 , 60, 62...
vintageteqparts.com
YAZAKI Water / Coolant Temperature Sensor Sending Unit Union Harness Repair Kit & Rubber Boot - VintageTEqParts.com
- YAZAKI Water / Coolant Temperature Sensor Sending Unit Union Harness Repair Kit & - Rubber Boot Comes with Correct...
vintageteqparts.com
The CHG would be an idiot light, therefore so would your OIL if your cluster was in original condition. Those gauges have been swapped out for gauges that match your rig’s year.
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- #10
What do the adapters look like. Theses are the ones on my engine. Does that mean they won’t work with the stock gauges as is?
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My understanding is those Chevy senders won't send correct signal to your OEM gauge. Never seen the adapter. Imagine it would have male SBC threads and female BSPT threads for the Toyota sender. You probably also saw where a couple guys said they used teflon tape and screwed the Toyota sender into the chevy block(even those the threads are different).
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- #13
So basically I need Toyota units with adapters to fit my Chevy block? I think mine are the same as yours aren’t they? So it must be my gauges are bad?
B4 you replace your gauges you should test them along with the senders per the FSM. The wires may not be connected correctly or at all thru the painless wiring or a fuse may be blown. You should make certain the senders are the correct Toyota senders.
That's what I did. I'd say our temp sensors look different, but I can't definitely say yours is wrong. I'll have to find a picture, but I want to say the Chevy sensors looked similar.
I'd try momentarily grounding the lead to the sensor, the needle should move to high rather quickly, don't leave it there.
Or do it the right way with a 3.4W bulb as outlined in these threads:
water temp gauge '71 fj
Tested the sensor out of the engine...at 90 degrees room temp 0 ohms tested the gauge circuit ala the manual and it does what it should... thinking this means the sensor is bad? any other tests I should make before replacing it?
forum.ih8mud.com
Oil Pressure Sender Problems
I apologize for the novel. I’m having trouble diagnosing some problems with my new oil pressure sender unit and I want to list out everything I have tried so far. Here’s how it looked when I got the truck: I had my wife watch the oil pressure gauge while I touched the stripped wire to the...
forum.ih8mud.com
My bet would be the sensors being nonToyota.
PS. Those were the two gauges that didn't work with my sbc (sensors wrong), the others worked.
GM water temp sensor that didn't work with Toyota gauge:
I'd say my GM sensor looks awfully similar to yours.
I can't seem to find a pic of the GM oil pressure sensor.
I'd say my GM sensor looks awfully similar to yours.
I can't seem to find a pic of the GM oil pressure sensor.
You're Killin me, you get it fixed up?
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- #18
Not yet been super busy at work hopefully I’ll be able to mess with it soon. I may just change out the whole gauge cluster all together. But I’ll still have to determine if the sensors are GM or Toyota
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Not yet been super busy at work hopefully I’ll be able to mess with it soon. I may just change out the whole gauge cluster all together. But I’ll still have to determine if the sensors are GM or Toyota
My Special Repair & Restore Sending Unit & Sensor Kits , these are caused off the needed Solutions
toyota format................
Not yet been super busy at work hopefully I’ll be able to mess with it soon. I may just change out the whole gauge cluster all together. But I’ll still have to determine if the sensors are GM or Toyota
Do you want to change the cluster? I wouldn't swap it over oil and water gauges. Testing by grounding is quick. I'd put money on the sensors being GM.