Sensor in water pump housing.[700/1986]

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Sensor in water pump housing.[700/1986] posted by Andy Brennan on
Monday, 25 June 2001, at 4:49 a.m.

I have just aquired a 1986 Volvo 760GLE.
how can I tell by looking at the engine whether I have the B28 or B280 engine ? - I think it's a B28.
The sensor fitted in the water punp housing is also missing ( previous owner fitted new pump and lost the sensor ). Is this the Thermo time switch ? and does anyone have a part number for this ? Would this also cause the diagnostic code ( 2 flashes ) ?

Many thanks

Andy. --
andy

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