My old Subaru named Steve has 268K miles on it and some issues that I have been unable to figure out. These problems may or may not be related:
1. Oil leak, it used to be that I would pull to a stop and a nice plume of smoke would billow out of the engine compartment. Then I took the timing belt covers off, since that is cool and nice to do, but now the oil is all over the inside of the hood, especially towards the front and a good amount comes dripping out of the hole where the hood prop goes when I lift the hood. Oil also ends up on top of the engine, but somehow not on the belts. I did the camshaft seals, crankshaft seal, oil pump seals, valve covers and poured UV dye in the oil to try to locate the leak. During idle I could see a small fluorescent drip out of the seal that is inside of, and parallel to the valve cover seal (is that the cam tower seal?) and more glowing oil appearing around the oil pan bolts at the back edge of the oil pan. I'm going to try to do the oil pan gasket next and wondering if there is a seal above that between the engine and the transmission which could be the culprit. I had the clutch redone a 30K miles ago by Maaco, and maybe they did a crappy job with the seal?
It seems crazy that the oil should end up towards the front and on top of the engine, but I know that when I had a leaky drain plug on the transmission, the transmission fluid was all over the front of the tranny…so the wind under the car is a mystery swirl to me…
2. Coolant loss. After about a week or so the reservoir tank will be empty and I can usually add a cup of antifreeze in the radiator to top it off. I do not see any drips outside of the engine, so I don't know where the coolant is going. It doesn't seem to be making a lot of white smoke at the tail pipe or smelling excessively sweet.
3. Gurgling/sloshing/dripping noise when I start the engine, accelerate, and turn the engine off. It comes from behind/towards passenger side dash. This seems to be worse when the coolant has ran low, so I suspect that is the problem, since the noise isn't there when the radiator is full.
4. Exhaust smell inside car when I turn on inside fan while at standstill. But I can't seem to find the exhaust leak nor smell it under the hood or around the car. I was going to pull the whole exhaust down and inspect it under those metal protective plates, along with changing the exhaust manifold gaskets.
I thought it may be the head gasket, but there is no exhaust smell to the antifreeze, the reservoir tank is not oily and doesn't have bubbles, the oil is clean looking (no milky froth), and it doesn't seem to be smoking white out the tail pipe when warmed up.
Obviously these problems may be totally separate, but could also be related.
I figured I'd start with the intake manifold gaskets, thermostat and thermostat gasket, oil pan gasket, exhaust manifold gaskets, check exhaust for holes under the shields and go from there…anything I am missing, or am I making too much work out of it? I could just keep running it where it smokes and drips oil, and just keep topping up coolant along with turning off the inside air whenever I drive in town and have to stop a lot.
any help is much appreciated!