LX 470 2006 Camshaft Seal Leak

[Warsaw Ogurec]

Hi Everyone,

I have recently purchased a 2006 LX470 with 200k miles. The last timing belt change was at 100k, so I started working on the timing belt change. As I dissasembled the engine, I saw it's heavily covered in old grease, suggesting an oil leak. However, I can't figure out if the oil leak is from valve cover gaskets, camshaft seals, or maybe something else entirely (not sure what)? I will obvisously replace valve cover gaskets, however changing camshaft seals on this engine (VVT-I) requires taking out camshafts, which is a big job which I would rather avoid if not neccessary. Is there a good way to tell if the camshaft seals are leaking?
Thanks in advance!

 

[LJE]

I'm not experienced with either camshaft leaks or VVTi 2UZs - but is there oil inside the front timing belt area? That's where I suspect a camshaft oil leak would end up.

 

[OEMGUY0720]

I would clean up the area thoroughly and put everything back again drive it for 100 miles and check again. Also check the valve cover bolts if they need retightening before driving it.