South Africa

South Africa
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02 April 2010

Coolant overflow pipe mod

We all know that a anti-freeze/summer coolant is important in cooling systems on any engine, so great off we go knowing that the engine is well protected, as part of the cooling system there is a overflow to allow excessive coolant mixture to flow out if over filled or to vent excessive air pressure as the engine warms up.

Great, its designed like that but on P38s this vent pipe is badly positioned because as the cooling system starts to vent it does so where there are electrical connectors etc, in the pictures you'll notice two connections and if you separate these (depending on age) you're sure to find corrosion as I did on mine.

These connectors are various inputs into the engine ECU and could give a bad signal.

The mod is very simple and takes around 2 minutes