Sacrificial Anode
51826
Engines with closed cooling systems have sacrificial
anodes A located on the heat exchanger as shown in
the illustration.
Anodes are slowly eroded away by galvanic action and
require inspection. Additionally, anodes that are sub-
jected to frequent wetting and drying require periodic
scraping with sandpaper to remove scale and oxida-
tion to maintain their effectiveness. Do not paint ano-
des, as this will destroy their effectiveness.
When you need to purchase new anodes, see your
Volvo Penta dealer. The material composition of Volvo
Penta anodes meets U.S. Military Specification
18001-H. Some after-market anodes may not meet
mil-specs.
Inspecting Heat Exchanger Anodes
The anode resembles a bolt and may be removed and
replaced using a 3/4 inch (19mm) wrench. If the anode
is more than 30% eroded, it should be replaced. When
installing, tighten the anode all the way by hand, then
turn an additional quarter turn using a wrench.
Maintenance
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