When you can’t find that pesky oil leak.....

I hope that the o ring is your leak. It was on mine.
Since the oil pan is glued on, that seems unlikely culprit.

 

I think that the figure 8 O-ring is the problem. The leak got worse after moving the adapter around and reassembling it without replacing the O-ring. I am fairly sure that the new one will fix it. I mean, that O-ring is 21 years old and then I disturbed it by rotating it.

 

I think at 21 years, you got your monies worth.

 

Hello Diablo 675.
I need to understand more on how to get to the last bolt. did you completely loosen the ac compressor (not the hoses) and move it out of the way of the one bolt that is behind the ac compressor?

 

The repair for this problem is covered on the awesome Toyota Maintenance YouTube channel:

https://www.youtube.com/watch?v=eeWAQzcqhPo

 

hello shifty - yeah started this double oring gasket replacement based off this video. The sequoia must be slightly different than the Tundra. there is a bot behind the ac compressor on my Tundra configuration.

Thanks.

 

Anyone know how much more involved that makes this compared to the above video? I was just told my truck has this same issue.

 

I talked with Diablo675 again and it will take some doing but he has mentioned a couple of times to me now that it is well worth it. I have 285,000k on my 06 DC & just changed the valve cover gaskets & that did not completely solve the oil leak problem. I can see and am 99% sure it is this little figure 8 o-ring @ the oil filter adapter.
I'm going to tackle mine in the next month and will keep you posted.

 

Update.

Still no drips after the oring repair.

 

Well I tackled that job today. Took 3+ hours. It definitely was the culprit..... No Drips! my driveway has taken a beating for the last year, but no oil now.
When Diablo675 talk about loosening the AC compressor, its not only the compressor in the way, it's the bracket for the AC compressor.
This job was well worth it.
Please reply with any questions while my mind is fresh.

 

So @adanielfish asking for @68BelowZero due to his frustration over here. I'm replying here in this thread to try and keep the info consolidated.

If I'm reading your reply right, it looks like you not only had to loosen the A/C compressor, but also the A/C compressor bracket in order to get the filter cooler/housing off, correct? Can you go into a little more detail about that process, what the "Aha!" was that finally let you pull the housing out?

 

I’m glad my post has helped some people. I sure have learned a lot from you fine folks.

 

That is correct. You loosen the AC compressor and move it to the side. Once it's moved to the side, there is a fairly large bracket that holds the compressor - If I remember correctly, there are two bolts holding this on. Once you get this ac bracket off, you have complete access to the last bolt that is holding the oil filter adapter. I did not have to unhook the cooling lines that went to the adapter, and was able to put the double o-ring gasket in with the lines still hooked up.
I used some really long 1/2" socket extensions to get to all of this with swivel adapters for my impact.
You will get access to a lot of the bolts from the drive side wheel well (you will need to remove the wheel well shield).
Like I said, it took me all of 3 hours, but is totally doable and if you have a leak there, this is the fix.
I still have NO LEAK!!!
please let me know how this goes for you and please don't hesitate to ping me again.
Thanks

 

It has been an adventure today for me. 2 of the bolts had rounded heads, then the top left bolt is blocked by an ac line. Still have yet to get that last bolt. Had to quit for the day before I got my Sig out! And 2 of the bolts weren't even tight!

 

Thank you for this thread. I think that where my leak is coming from.