Little oil leak

Found a little oily residue behind the engine oil pan, on the trans housing(correct me if I’m wrong). The only reason why I bothered looking was because I took the truck to Colorado and drove the alpine loop. And while on the loop I smelled something weird. I just couldn’t tell what is was. But something smelled off. It’s not much oil but it is disappointing. Truck only has 3k miles. Purchased july

 

Oh no,

hybrid? I saw a guy who had something from the hybrid area oozing out.

hard to see on my phone where that is in your pic. Obviously get to dealer asap

 

Non hybrid. Here’s a zoomed out pic of the area

 

was it serviced at dealership recently ?

 

It hasn’t been serviced yet

 

Probably my post here:
https://www.tundras.com/threads/front-diif-issues.111141/#post-2879722

Seems very similar, the oil seems to be seeking from the rear of the engine and/or front of the transmission. In my case, the electric motor is sandwiched between the engine/transmission.

 

Considering the location, and what looks like a weep hole from Toyota, I wonder if it could be a rear main seal leak.

 

Could also just be some assembly lube making its way out after being heated up. Is it dripping or just that light oil stain?

 

It looks light yellow not red or pink so most likely engine oil in that area. I agree with Tilly, any motor I have ever seen weeping oil in that location points to rear main seal leak on crankshaft. Can you update us after dealer repairs it?

 

Agreed, that it could be RMS, but if you look at my post, here, which seems to be very similar or identical to @Bennza, I've got oil weeping both in front and rear of the electric motor that is sanwhiched between the engine and transmission. This leads be to believe that it may not be the RMS, but maybe, like suggested by @Dieseldiagnostics, assembly oil/lube.

Dealer have cleaned it up and will revisit down the road if still present.

 

I noticed the same thing on my 2022 while installing the cat shields at around 500 miles. Dealership inspected and said main seals had to be replaced because it was slightly deformed allowing a small amount of oil to leak. No issues since but now I feel the need to crawl down there and check again.

 

Did you get your seals changed after all or its going to be done in the future?

 

They changed it out. Disappointing that it had to be done on a new truck but seems fixed.

 

Ooof. I would hate to do an RMS job on a new truck. I've done that job 3x on different XJs. It's a notorious place for leaking on those Jeeps.

I had some oil build up on my skid plate & cat shield recently. I noticed it after some trails because the oil caught a bunch of dust & dirt build up. I ended up pulling the skid & shield both completely off and cleaned them. I couldn't find any leak or weep anywhere on the engine. I had my truck in for the 10k service earlier that week so I just chalked it up to a lube tech who was messy.

I'll crawl back under this weekend to see if there any more oil build up. I've got about 5k miles since then now.

 

Well then, if it's the case, another thing to add to my list of issues with the truck. But before I make a judgement call, I'll clean it up and monitor it closely!

 

reminds me of the cam tower leaks on gen 2s....

 

I've got the same issue with my non-hybrid 3rd gen. It goes to the shop tomorrow and we'll see what they say, but my first thought was it must be the rear main seal. based on what i've been cleaning up, I would estimate a good ounce or so per every 250 miles is leaking from the seal.

A little disappointed considering the truck has less than 3k miles and has not been abused.

 

Its the new Toyota self lubricating system exclusive to the Tunda, it keeps the frame from rusting. Jeep has had that system for years. I wouldn't worry about it too much until it hits the ground or I am within a few thousand miles of the end of the warranty period.

 

Rear main seems like a possibility. I know it was semi common on the UR motors in the previous gen as I see it come up fairly often on the GX groups. Usually its not an issue and more of an annoyance as it won't leak fast enough to even show up on the dip stick.

 

Ill have to check mine. RM should not be leaking at all until high mileage if it is designed properly and good quality seals are used. Maybe if you are racing it with tons of high rpm runs or towing a lot and pushing it really hard. But still unusual in a new motor. A random case here or there I’d attribute to assembly issue or abuse.

 

Wipe it off and see if it comes back. Last gen tundra had oil from the factory in a location like that and a few members had to deal with dealer. They wiped it off and it never came back. If it comes back get it fixed.

 

As others have said it might be nothing but absolutely take it to a dealer immediately and get the work order to state exactly what you are seeing. If it's nothing then great but you keep driving and something goes wrong the NEW Toyota will GM, Dodge you with every "it's your fault" accusation to make your head explode. Nothing more fun than you having to prove its their fault while they just sit back and smile. Toyota played China Cheap with this model and it's biting them in the arse.

 

2022 Tundra SR5 TRD OR- less than 4000 miles | 6 months old. Just brought it in for the exact same issue. Noticed the residue when I was putting on my cat sheild. Brought it to the dealer today. They cleaned the area and drove the truck for a few hours (literally put 100 miles on my truck). No leak detected- told to monitor it. They stated "assembly lube" was the issue. Which I am reading in other automotive forums this is common?

All I do know is I was treated like absolute trash at my dealership. They wanted to charge me $120 bucks to just to inspect the issue. My service advisor (not the tech) crawled under my truck...said they didn't see anything and what I was referring to was "seepage." I asked if "seepage" was normal on a new $65K truck? They responded with- "Toyota doesn't warranty seepage." I was livid. I had a polite Convo with the service manager- I did not pay the $120.

Not shitting on the truck by any means. I love the thing! 3rd new Toyota I've purchased | 3rd dealer I've bought from- worst service department I have ever dealt with. Not trying to sway anyone from Toyota- just venting lol! I hope all of you are having a better experience and are enjoying your truck!

 

To be honest, this is more of an issue with your dealership than the truck. Sounds like your dealership service department (at least people you’re dealing with) are fairly dumb. To be fair, that’s not uncommon nowadays, unfortunately. They should never threaten to charge you for something that would covered as a warranty issue.

I had the same oil residue on my trans bellhousing area. Same as you…I noticed when someone else posted about it months ago. I wiped the area with a little simple green and have monitored it off and since then. Several thousand miles later, I have not seen it come back. There have been a few trucks where this turned into something serious (trans or RMS issue) but the majority of trucks it does seem to be assembly lube.

 

You are 100% correct and Just to be clear- I'm not hating on the truck. I absolutely love it! I took it in as a precaution & to document the issue for myself & other Tundra owners.

 

YouTube Video. Toyota HATES YouTube videos.

 

Man some of these Toyota dealers stories are something. My dealer just takes care of everything with little questions , I’m lucky to have a good one, that’s where I’m getting the new one at which adds to the confidence of trying one.

 

Quick update to those who may be interested. I took the truck by the dealership and a shop foreman looked at the truck. I was getting the truck aligned (out of pocket) as I just installed upper control arms and coilovers which of course threw the alignment way off. Got the truck aligned with no issue and they proceeded to diagnose the leak. Foreman observed leak from the transmission bell housing and noted it on the warranty work order. They placed UV die in the oil and said to bring it back in at the next oil change and they would try to pinpoint the cause and make sure nothing else was leaking. Keep in mind, I had a very small engine coolant leak where an o-ring was pinched at assembly (engine oil cooler/heater assembly - part of the oil filter housing), which I was told required two of the three timing chain covers be removed for access, and is evident from all the RTV during reassembly. With that said, i'll not assume someone is being lazy, but trying to make sure they don't have any additional oil leaks before diving into this thing again. My service advisor who is very straightforward and easy to work with mentioned Toyota advised the dealer to proceed accordingly and may be a result of the previous repair, in which they were in contact with corporate about due to the nature of said leak.

We all know there's only one likely cause of an active engine oil leak from the bell housing weep hole... so their answer was less that satisfying, but i'm hopeful it will get fixed at some point. I did buy my "new" truck (50ish miles) 'used' so there is the 100k mile CPO warranty if all else fails. At the same time, I would also prefer my garage floor not have oil stains from my brand new truck

 

Did this leak end up being rear main seal leak? Did Toyota dealership repair under warranty? I have noticed the same type of weeping on my 22 Tundra Platinum. Just wiped if off as best as I could and going to see if more weeps out of seal area. I have over 22K miles on my Tundra so its possible that the seal leaks at lower mileage and then seals itself over time??? Not likely, but I am hoping that is the case. Dealership just serviced it less than two weeks ago and never said a word about the leak. It looked as though the service tech did wipe it with a rag, which really pisses me off that they did that and didn't say a word about it. So not impressed with my Toyota dealership, wish I had never bought the truck from them. The new truck buying experience has been poor since the day I drove on their lot. From all of the post so far, sounds like rear main seal is a known issue for this new Tundra model. Hopefully your truck is doing better now.

 

Had a similar issue with my 2022 tundra limited with 6000 miles on it . Took it to the dealer and they figured out it was the "freeze plug" leaking .
The dealer was able to get a replacement part the next day and repaired it. 2000 miles later no problems