This is a 1991 Volvo 240 with 141,000 miles.
In the process of doing some front engine work due to an oil leak, I plan to change out the water pump, the accessory bushings, the timing belt and seals, and the gasket on the plate surrounding the crankshaft. After viewing a couple of You Tube videos, several questions come to mind.
1. On the water pump, when applying some sort of gasket sealer, is it applied only on the pump side of the gasket? Is there a recommended gasket sealer? RTV, silicone sealer?
2. There are two black sort of O-rings, one on the top side and one where the metal water pipe enters the pump from the rear. One video recommended applying Vaseline petroleum jelly for each. I am concerned about a possible leak in those areas. Is there something more substantial/durable that would help ensure no leakage in those areas?
3. When pressing in the new accessory bushings, what choices do I have for lubricating those bushings. Would something like liquid hand soap be sufficient?
4. On the passenger side of the engine just forward of the oil filter there is a device (temperature sender?) screwed into the engine block with a wire attached that comes out of the engine harness at the same place as the alternator wires. What is that item? Any need to consider replacing that when the area is open and easy to get to?
5. When replacing the gasket and cover plate that is screwed onto the block around the crankshaft, same question. Is gasket sealer applied only to the cover plate side of the gasket?