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

If not, and it's leaking from the front, it's probably cam seal(s), but check your oil fill dipstick tube, and where it mounts to the block for oil, to see if maybe it's venturing down from the valve covers to the lower end via that dipstick tube. There's a chance someone didn't properly FIPG-seal the 90° corners when they either (A) had the valve covers off last or (B) redid the valve cover gaskets. Any time you pop off the valve covers, you really need to be cleaning out and re-sealing both right-angle corners on each head.

Cam seals are a bitch to replace on the '05-'06. If you're 100% positive the oil isn't originating at the valve covers and draining down the dipstick tube, before you get crazy and spend time/money on replacement, try a bottle of ATP AT-205, it shored up my driver's side cam seal leak 100%.

If you need pictures of what I'm talking about on leaking down tube, when leaking from those right angles, see this pic, looks like this could dribble down to the dipstick tube: https://tnstatic.net/attachments/upload_2022-1-8_21-52-38-jpg.683576/

But don't get me wrong, I was told this was driver's side cam seal leak, leaking from timing cover, and it looks like it could also travel down the dipstick tube: https://tnstatic.net/attachments/upload_2022-1-8_21-47-4-jpg.683570/

AT-205 stopped the leak showing in the 2nd of those two pics.

 

I just added 2/3 bottle to Ravioli yesterday. I'll report back in a month on results.

 

What's leaking on the RAV, I forgot? IIRC, it took about 200-300 miles of driving before things quelled. I posted on here as I went along. Basically, I wiped up all the oil, confirmed seepage was still happening. It was, so I added the

$15 AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle

AT-205. Cleaned up after, like, 50, 100, 150, 200 miles, and by the time I got to the 200-300 mile range, no more dribble. It's bone dry to this day.

 

Pretty sure it's the rear main seal. Started leaking in 2018 but I switched to Mobil 1 high mileage and it stopped. Recently I tried Pennzoil and the leak started again. I'll be switching back to Mobil 1 the next oil change. I figured the 205 was worth trying.