2012 Kia Sorrento 3.5 - Massive oil leak - NOT the rear main! How to replace the leaking oil sensor
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- čas přidán 31. 01. 2023
- Do yourself a favor and buy the special sensor socket! Less than $30.
shop.snapon.com/product/Oil-P...
A lot of newer vehicles can have major oil leaks where the bottom of the transmission bellhousing is soaked in oil. They can be hard to spot the source and easy to think it's from the rear main seal. It's usually NOT the rear main seal! Oil leak from inside the valley can find their way into the top of the bellhousing and drip straight down. They can be very difficult to spot through the plenum/manifolds. The Chrysler 3.6L oil filter housings that leak will at least have some oil on top of the transmission that you can see. They're much easier to spot the source. These Kia/Hyundai engines you don't see any of that. You won't see any oil in the valley unless you get a borescope in there. On these engines the leak is caused from the oil pressure sensor. When they go they tend to leak A LOT. They're REALLY unpleasant to change. You can't get on the hex of the sensor because it's too close to the coolant crossover pipe. I've changed them before with some modified wrenches. Time consuming and annoying. You could remove that crossover pipe. I don't like touching those. Or you buy the Snapon special socket for these. They're surprisingly cheap and make the job a breeze!
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This is an awesome video. I hate that I had to replace the rear main seal twice in the vehicle before I found this out lol
Appreciate this video. Just noticed oil drips on driveway, crawled under and it doggone sure looked like rear main seal leak. This repair looks like a pain, but less painful than the alternative! 128K miles...it may just be a trade-in.
@MrJpj2010 The repair is kinda ugly. Snap-on makes a specialty socket for the oil pressure sensor that's surprisingly cheap. It definitely makes the job MUCH easier. I don't like disturbing those coolant pipes if I don't have to. I think total cost to get the job done at a repair shop would probably be $300-$600 depending on where you went. The thing that really gets you is all the "extras". You have to pull the intake manifolds off to do this job. So it really makes sense to replace the spark plugs while you're there. That's an extra $100-$200. Then what if they pull an ignition coil and find a spark plug tube is full of oil..? Well valve cover gaskets can be an extra $300-$500. So full retail in a shop you could end up well over a grand on things that are actually important. A more greedy shop could push you close to two grand on upsells that are less important...
Definitely if you see lots of oil in this spot at the bottom of the engine then it's VERY unlikely for it to be coming from a rear main seal. MUCH more likely to be coming from in the valley as there are drainage holes up there that make the oil pool up down there.
I've seen lots of these cars go well into the 200K miles. All depends on if you like the vehicle and if you can find a good deal on anything else! I'm in Canada and the people here selling cars must be on drugs with what they're asking... Not as bad as a couple years ago during Covid but still pretty unreal!
Sweet video thanks for the tips and tricks. I will be tackling this job as soon as the socket comes in.
I broke the oil cover that the oil pressure switch goes to. I replaced it, with all gaskets, and still have a tiny leak. It's so aggravating.
I got mine done on my 2015 Kia Cadenza at a Kia dealership a month and a half ago and it still looks like it’s leaking. Could it still be residual oil? I checked the dipstick and haven’t really noticed a change in the oil level.
@swifty7479 There are a lot of casting folds and pockets in the valley so if the tech didn't make any attempt to clean anything then there definitely will be a LOT of residual oil. If they at least took a rag to it and soaked up most of the oil that was pooling then it wouldn't be that bad. There's still be a fair amount of residual. A month and a half seems like a lot. I'd remove the under belly splash shield if it's still there then go through a car wash that was an under spray. If it comes back in a couple days then you still have a problem. If you only see a drop or two reforming then you might be okay. I'd go back to the dealership and see if any of the techs there have a boroscope that they can put under the intake to see what's going on.
Is a 2005 sending unit in the same location
@markdephillips6 Nope. 2005 should have it down by the oil filter.
I also have a 2005 Santa Fe with v6 3.5L engine. So there may be hope that all this work to remove the manifold may not be necessary?