Cam and Crank seals 4.7 VVT-I

[4OYOTER]

I have 114K on my 2008. A shop told me my cam and crank seals are leaking from my timing cover, but I can't find this leak.I know I have a valve cover leak close by the passenger side timing cover, maybe they got it confused?

Is it possible to just remove the timing covers to check condition of the timing belt and see if there are any leaks coming from inside? I recently purchased my 4th gen from a dealer, with no timing belt history. However, when I recently changed my spark plugs I discovered they were not the originals, which leads me to believe maintenance was done somewhere else and not documented.

Here is a picture of what I believe the shop diagnosed as cam and crank seal leak.

 

[07V8]

I've never heard of the cam or crank seals leaking on the 2UZ. Especially at your mileage and age. Valve covers can and do leak on the V8. Sometimes retorquing thrm is sufficient. If not, simply replace and retorque. Do not tighten beyond the stated value (can't remember what it is at this time).

 

[4OYOTER]

Thanks for the help.

 

[Hench4Life_21]

I've never heard of the cam or crank seals leaking on the 2UZ. Especially at your mileage and age. Valve covers can and do leak on the V8. Sometimes retorquing thrm is sufficient. If not, simply replace and retorque. Do not tighten beyond the stated value (can't remember what it is at this time).

Do you have any instructions on doing these? I'm trying to find some. I plan on was recommended to do them when i replace my timing belt here soon.

 

[alia176]

Do you have any instructions on doing these? I'm trying to find some. I plan on was recommended to do them when i replace my timing belt here soon.

Download the FSM here http://www.toyota-4runner.org/4th-gen-t4rs/100275-service-manual-download-links.html

 

[BlackWorksInc]

Apparently from some of the older guys at my shop the VVTi ones tend to leak later in life. The Non-VVTi ones do not seem to leak as frequently as the VVTi ones do.

The way the seals are done on this particular engine are very weird... you actually have to take apart half of the camshaft to replace the seals (unlike most of our engines where you can just pop the sprocket off and access them.)

 

[Hench4Life_21]

Download the FSM here http://www.toyota-4runner.org/4th-gen-t4rs/100275-service-manual-download-links.html

Thanks a ton

 

[Hench4Life_21]

Apparently from some of the older guys at my shop the VVTi ones tend to leak later in life. The Non-VVTi ones do not seem to leak as frequently as the VVTi ones do.

The way the seals are done on this particular engine are very weird... you actually have to take apart half of the camshaft to replace the seals (unlike most of our engines where you can just pop the sprocket off and access them.)

I was reading on some other threads that the VVTI one's are harder to swap, and the non-VVTI you don't have to remove the camshaft? Is that what you're referencing? I have the non-VVTI variant

 

[BlackWorksInc]

I was reading on some other threads that the VVTI one's are harder to swap, and the non-VVTI you don't have to remove the camshaft? Is that what you're referencing? I have the non-VVTI variant

Yeah, that's what I'm referring to. The VVTi ones are weird to explain without a picture.

 

[Arailt]

Sorry to resurrect an old thread. I have a 2008 GX with a leak in the exact same spot. Did you ever figure out the source or fix this OP?

Thanks!

 

[4OYOTER]

Sorry to resurrect an old thread. I have a 2008 GX with a leak in the exact same spot. Did you ever figure out the source or fix this OP?

Thanks!

I never did anything about it. It’s been 30k miles and I forgot all about it till I got this thread notification.

 

[Arailt]

Haha sorry to open old wounds!