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3VZE oil pressure sender leak

Old 01-08-2019, 12:53 PM
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3VZE oil pressure sender leak

So it seems my oil pressure sender has developed a leak, the threads are dry and not leaking, it seems to be from the assembly itself. I just changed my oil recently and would prefer not to do it again immediately. Has anybody heard of catastrophic failure of the sender causing it to loose oil very quickly? That is my main concern while driving, if it continues to slow drip I will get some mileage out of this oil before I dump it again to change the sender.

Looks like this is the Toyota p/n:
8352034010 (with gauge)
https://parts.lakelandtoyota.com/p/T...352034010.html

Oil drip:

Where I assume it is leaking from:
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Old 01-08-2019, 02:01 PM
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Just replace the sender? You shouldn’t lose significant oil changing it, no more than what’s already leaking from the busted one.
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Old 01-08-2019, 02:04 PM
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Originally Posted by mholme View Post
Just replace the sender? You shouldn’t lose significant oil changing it, no more than what’s already leaking from the busted one.
Is that right? I've never pulled one out with oil in the engine before, I assumed I'd lose quite a bit of oil.
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Old 01-08-2019, 02:28 PM
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Originally Posted by az4x4runner View Post
Is that right? I've never pulled one out with oil in the engine before, I assumed I'd lose quite a bit of oil.
Unless you’re gonna change it with the truck running, you shouldn’t lose much.
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Old 01-08-2019, 02:33 PM
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Just hold your dipstick NEXT to the dipstick tube. Where is the "full" line compared to the position of the sender? Yes, there will be some oil in the galleries behind the sender, but you probably won't lose more than a tablespoon or two. Even less if you let it sit for a while. For that matter, that little bit of oil will hang around there even if you drain the oil out of the pan. So you're good to go.

BTW, good job tracking down the part number online. Just so you know, RockAuto has aftermarket units for as little as half Lakeland's (otherwise very good) price. So you have a choice.
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Old 01-08-2019, 02:58 PM
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Originally Posted by scope103 View Post
Just hold your dipstick NEXT to the dipstick tube.
Good idea, thank you.
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Old 01-08-2019, 03:13 PM
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I was going to use Teflon tape on the threads, I imagine they will cut through to allow a ground. I see the FSM suggests: Part No. 08833–00080, THREE BOND 1344,
LOCTITE 242 or equivalent.

What do you think would be the best option?
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Old 01-08-2019, 03:24 PM
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I think teflon tape would be fine. (It's good enough for nuclear reactors, I'm sure it will hold back 100psi of oil) Rad4Runner has had experience where sensors apparently failed to ground through corrosion in the threaded joint, but I doubt you'll have that issue. And you'll know immediately if it doesn't work.

Loctite 242 (or equivalent, like Permatex Blue) might give you a little more "locking," but the threads are tapered so with modest torque they are unlikely to shake loose. But a threadlocker might give you a little peace of mind.
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Old 01-08-2019, 04:54 PM
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Got one on order from O'Reilly to pick up tomorrow morning. From the description it seems to have thread sealant pre-applied to the threads.

It's an Import Direct - $38.99 w/lifetime warranty.

Last edited by az4x4runner; 01-08-2019 at 04:56 PM.
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Old 01-09-2019, 11:50 AM
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New sender is installed, functioning and no longer leaking.
O'Reilly Import Direct p/n: 17-0632

The plug broke off the harness while I was installing it, 24 year old wiring just gave up. There wasn't enough wire attached to the plug end to splice it back on, so I have a new one (p/n: 90980-11363) on order and used a female disconnect terminal in the meantime.

Included part numbers for anyone interested.








Last edited by az4x4runner; 01-09-2019 at 11:59 AM.
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