volvo 2002

[johnmuir]

Does anyone know what small unit is below heat exchanger with label saying special battery charging unit or something like that. Also had to remove pipes on back of fresh water pump to access nut to change engine mount last year. replaced seal but still have slight leak. Pipes are only held in place due to length and water pump at one end and heat exchanger at other. Any advice or ideas ??

 

[DJE]

I had the cylinder head off mine last winter and all the indirect cooling system had to come off at the same time. I thought it was the starter motor under the heat exchanger. I don't recall seeing a label like you have.

Several pipes seem to be just squeezed in position and not individually clamped. I was amazed that mine didn't leak when I put it back together. The heat exchanger on mine is held in a large clamp. The trick was to push it firmly forwards while tightening the clamp; this seems to be the only way to compress the seals.

 

[EdEssery]

Some later Volvo 200x engines (the B series) were electrically isolated and had two pole electrics. You can tell if you have one of these if the engine sensors (oil pressure, temperature etc.) have two wires going to them rather than just one as is the case on the original models.

These B series engines have a piece of kit (I'm not sure what it does) bolted to the bell housing behind and below the starter motor. This has warning labels on it of the sort you describe and is where the main negative bus cable is connected to the engine.

I know this because I have just changed my engine from a single pole electrics 1986 2001 to a 1993 2001B with twin pole electrics.

Ed