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1kz-te injection pump leaking from the fuel-temp sensor :(

GPW

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Aug 12, 2018
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10
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uk
Gook luck with yours Mike S.
To summarise the steps I now believe are required to do a quick external fix:

1. Clean area thoroughly with a small paint brush and brake cleaner spray
2. Remove the plug from the sensor terminal. Clean a bit more if required, esp. around nut.
2.a You may wish to make some room by disconnecting some of the loom and holding it away with a bungee
3. Remember (photo) where the nut sits for reference. Get a tall 32mm socket.
4. Undo the nut about 2mm (2 turns?) only. Pull sensor upward to verify - this gap guides the PTFE in.
5. Feed in 24" (or so, this is an estimate) of thin plumbers PTFE so it grips and gets right down into the channel below the thread. This is a 2 handed job as you'll need to keep the tape low so it feeds in ok.
6. Tighten the nut back, keeping an eye on the sensor, do it by hand first as you lift the sensor.
6.a. Not too tight, snapping it off is probably going to be trouble.

7. Test by pumping up the primer and looking for seepage.
7a. If it still leaks use more PTFE and make sure you get it wrapped properly at the start.

HTH

P.S. When I did mine I let it sit overnight so it was cold (and some fuel had drained back to the tank) so there was no fuel everywhere when I did it.
 

Mike S

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Aug 16, 2018
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new_zealand
Thanks a lot.
The info was all very helpful.
I repaired mine today exactly as you said and now, all dry and no leaks.
Very nice.
Again thanks a lot.
 

StarCruiser

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Oct 7, 2014
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2 down. This has the makings of a reasonably successful bush repair.

I think 6a would be :angry-screaming::angry-screaming::angry-screaming:
 

Slowcruiser

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Mar 4, 2020
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united_states
Hi all, just wondering how this fix has faired over the last 2 years? I have the same problem - diesel leaking out of that sensor, only on startup when cold. I imagine the metal expands when it heats up and then creates a seal. How has the PTFE stood up, I'd be worried the heat or diesel would degrade it?

Thanks!
 

fatigue81

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Jul 24, 2021
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australia
FYI that sensor on top is the speed sensor AFAIK. See the denso v3 manual.

Fuel temp is on the accessible (haha) side, bottom right. Comes out with a deep socket when required.

I've sprung a leak from the little plate bottom centre on that same side. Denso manual doesn't bother to identify it, nor does the Toyota parts breakdown. Boo.

Is there a gasket that fits it? Who knows. Seems like someone's gooped it sealed at some point.
An injector specialist it would seem.

Double-boo.
 

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