Cooling System Neglect
Symptoms
Overheating, coolant loss, white smoke from the exhaust (head gasket failure), corroded radiator, seized water pump.
Cause
Old coolant turns acidic and eats away at aluminium and brass components. The B30's iron block and aluminium head require proper inhibited coolant. Neglect leads to internal corrosion, blocked passages, and ultimately head gasket failure.
Fix
Flush the system thoroughly.
Replace the radiator if it's corroded or leaking, reproduction units are available.
Fit a new water pump (check for play in the bearing and shaft seal condition), new thermostat (test it in boiling water first), and fresh hoses.
Use proper extended-life coolant with corrosion inhibitors.
Replace the radiator cap, a weak cap allows the system to boil over.
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