Volvo Penta,TAMD 74 PB, 2002

by Curtis
(Miami, Florida, USA)

Ever since I had cooling system flushed, heat exchanger descaled, raw water pump replaced and new coolant added the engine spits coolant from the overflow tube. When filled to approximately 2 inches below the top of the fill tube (as per Volvo Penta) it spits more. After the level has gone down some it spits less. But it always spits. Engine does not overheat and runs well. Radiator cap has been replaced. This is a recent problem following described work.

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Feb 16, 2021

by: John

It would appear to partially pressurizing. Go through cooling system and my best guess is some pressurization coming from heat exchanger, might be very small but the descaling may have had something to do with this.

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