Do head gasket sealers in a bottle work?

PFL's Impreza has a similar, but not identical engine. Yours is the 2.5L dual overhead cam (DOHC), which was well known for internal leaks between the coolant jacket and the cylinders themselves, allowing exhaust to enter the coolant and eventually create bubbles and hotspots, overheating and other pretty much terminal engine problems. The 99 impreza either had subaru's bulletproof 2.2L engine, or an upgraded 2.5L single overhead cam (SOHC) that had an improved interface between head and block, thereby stopping the internal leak problem.

But it did have a habit of developing an external leak -- coolant to the outside of the engine -- which Subaru attempted to fix with a conditioner. While those Checker Auto head gasket repair liquids might work in a tractor, or temporarily in a far cruder engine than Subaru's aluminum boxer-style block, no conditioner or leak stopper will accomplish anything but gum up the water pump in your Outback, unfortunately. Though aftermarket parts makers did ... more.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.