CLEAN COOLING
FIRST LINE fills VITAL NEWS in on electric water
pumps and how to keep them in good shape.
In efforts to reduce engine emissions, many vehicle manufacturers are
using electric water pumps instead of, or alongside their traditional beltdriven counterparts. Cooling component specialist First Line mirrors
these market developments with the addition of 10 primary electric
water pumps and 27 secondary electric water pumps. The primary
pump effectively replaces the traditional, mechanical pump. The
secondary pump is fitted alongside a mechanical pump and
often has several auxiliary functions.
Modern low-emission/high-output engines need to run within a
narrow temperature threshold bracket to maintain their efficiency.
Electric water pumps regulate coolant flow in accordance to the ECU’s
(Engine Control Unit) specifications. Furthermore, forced induction
engines require additional cooling of the turbo or superchargers after
shutdown in order to prevent premature wear or damage.
PRIMARY PUMPS
Certain BMW, Lexus and VAG models are fitted with a primary electric
water pump instead of the traditional belt-driven option. Due to the
pump’s position, its exposure to heat and other extreme conditions, they
often fail prematurely (sometimes, even before 100,000 miles).
As with most engine components, specifications can vary between
suppliers. It is crucial to fully understand the available aftermarket
alternatives and realise that the internal makings may vary. Investing
in quality replacement electric water pumps is strongly advised because
solder can melt at around 180°C whereas a welded joint is more durable
by offering strong joints. Therefore