Oil leak, but from where?

MudMud

New member
I have a 98 (new to me) SR5 with an oil leak from somewhere. I am getting a few drops overnight onto the floor and after a trip, it smells slightly of burning oil when I park.

I removed the skid plates to hopefully get a better idea of where it's coming from and it's definitely coming from toward the front on the driver's side. I got under there and everything is just coated in oil. I looked around and the highest point with oil appears to be right above the exhaust manifold. I can't tell for sure where it's coming from, but I'm thinking valve cover? This guy's photos are identical to what mine looks like, except mine is caked oil and his looks more wet - http://www.toyota-4runner.org/3rd-gen-t4rs/202171-how-diagnose-leaking-gasket.html#post2074410

What would be the best way to confirm that this is a VC gasket leak? I don't think it's a head gasket because I don't have any of the classic symptoms that point to that.

If it is the valve cover gasket, what all should i replace while I'm in there? The timing belt was completed a few months before I bought the truck, but everything else is fair game. Or, if I'm already going in, should I just bite the bullet and do the head gaskets too since it's only a few extra (expensive) steps?

I've only got 163k miles, so I'd like to keep her taken care of as much as possible. Any advice is appreciated.
 
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I don't have a mirror, but I did just now shine my light on the rear half moon on the driver's side and it looked pretty wet. I stuck my finger back there and it is just covered in oil. So I'm guessing that points toward valve cover, which is no surprise really. The bolts are already tight, so I have no choice but to take it apart and do the replacement. So now the question is, what all should I do while I'm in there?
 
Well try tightening the vc bolts, they are probably so loose you can turn them by hand. If they're loose then that is the source of the leaks.

Most likely it is the vc s, Very common on these 3rd gens. Just replace the vc gaskets and seal the cam plugs again; and don't get carried away with the head gaskets, asking for trouble there. Just do a search on vc gasket replacement for details, not difficult, just time consuming.
 
You may also be getting confused by the fact that it is very easy to spill oil when filling the engine and removing the filter nearly guarantees oil will get all over on the top of the skid plate, etc.

Your best bet is to clean it all up really well and then find where it gets wet with oil again.

Valve cover gasket is still the most likely source...

-Charlie
 

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