Leaking trans and engine oil pan 02 4.7

My 2002 V8 4wd tundra with 680,000 miles is leaking from engine oil pan and where the transmission meets engine, real main seal? All original probably be easier to fix by pulling engine and trans together? Point me to some good threads, manuals, videos or share some knowledge. Thanks

 

Mine is mildly weeping in the same area. Coming out of the bell housing. Until it gets worse I’ll just monitor it. When it comes time to fix, dropping the trans is likely the easiest route. I’ll have to research further. The FSM is available here and I have a Chilton’s manual I use as well.

 

680,000... nice!! How's the motor running? tranny? how long have you had it? everything original?

You might check YouTube guy Car Care Nut.... He's strickly Toyota/Lexus master tech and does a ton of videos and if he covers this subject, chances are you won't need reference anything else!!! He goes through tricks and addresses hang ups... no nonsense good info from that dude!

 

I saw my pan had a slight leak as well. From what I saw, with 4wd you have to remove the front diff to get the pan off. I don't remember what else. Rear main wouldn't be bad just pulling the trans. It may not be a bad idea to pull it. You could also do your exhaust manifolds if they're ticking since the motor is out and they're a bitch to get to.

 

When was the last time you did your valve covers? When mine were leaking at a whopping 72,000 miles, it coated the oil pan, mostly on the driver's side front of the pan. Valve cover gaskets seem to be notorious leakers on the 2UZ-FE if I'm going by collective input here.

Re: Rear leak ..... Check the half-moon plugs that sit in this notch, or shine up from the rear to see if you see oil leaking from there? They should've been pulled/cleaned/re-sealed at every valve cover gasket change, along with the tube plug seals. I'd expect your truck to be on its 2nd or 3rd gasket change by now. Giving us some pics around the bay (from the top of the engin) in good daylight may help us help you find the leak.

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Post some picture

 

We’ve hit 88mph!

Have you tried putting some

$20 AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle

AT-205 in the oil? Might be a cheap bandaid for a while.

 

I wouldn't think of it like that ... It's a long-term solution you can run for the life of the oil, something more along the lines of regular-maintenance. Think of it like any other additive, it's essentially what big-name oil companies use as part of their additive package in their "high mileage" oils. Which is also similar to how big-name companies install additive packages into their gear oil for extra slip, heat protection, etc.

$20 AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle

AT-205 isn't, like, a stop-leak band-aid like Barr's Stop Leak or similar. The goal of AT-205 isn't to "get you by long enough to reach a mechanic", it's a seal rejuvenator. When you dump that bottle in, you're effectively turning your existing oil into higher-potency "high mileage" oil.

 

thank you for this insight. I run high mileage oil already, do you think it would be a benefit for me to put in a bottle as a preventative measure on my next oil change? No leaks since doing my valve covers earlier this year. 238k

 

It's not going to hurt anything, I run high mileage oil also. It squashed my cam seal leak and reduced my valve cover leak. But the source of my valve cover leak was a piss-poor job someone else had done prior with FIPG sealant in the corners nearest the timing cover. So I had to do the valve covers anyway, but I haven't seen a single drop of oil below the front driver's side cam tower, and there definitely was one there before.

I'm running a bottle in my engine every 2nd or 3rd oil change for the full life of the oil. And I run a can of Seafoam high mileage in the crankcase about 500miles from each OC to help loosen up any stubborn carbon. What you do is up to you, and this may not work for you personally. It's what I've done with most of my cars.

Whatever you do, just don't be that guy who uses a vacuum hose to suck Seafoam or other solvents up into your engine. They specifically warn you not to.

 

Definitely not valve covers I need to replace oil pan

 

I don't deny it definitely needs to be re-gasketed. But this oil staining is up awfully high to just be the pan.

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Manuals or videos on pulling engine and trans together??

 

This is gonna be perceived wrong, but what is the upside to fixing this. How many other issues are gonna come up by pulling the motor? With the current mileage, is the expense of fixing it worth the trouble?

 

I've also got another motor and trans with 180,000 that I pulled out of a wrecked parts truck I kinda just wanna learn how to pull motor and trans it'd be cool to keep the original engine and trans going til it blows

 

Makes sense. Im just imagining how many bolts/studs, wiring, and plastic clips are gonna break during the process