Testing Coolant For Alkalinity; Draining Fresh-Water Cooling System - Crusader 5.0L MPI Instruction Manual

ENGINE MAINTENANCE - 11

TESTING COOLANT FOR ALKALINITY

It is recommended that the coolant in the fresh-water
section be tested each year for alkalinity. Coolant
that is not alkaline has lost the effectiveness of its
rust inhibitors, which can lead to internal corrosion
and cooling system problems. It is recommended to
replace the extended life engine coolant, known as
DEX-COOL™, in the system every fi ve years to prevent
a build-up of harmful chemicals within the fresh-water
system.
1. Obtain red litmus paper from a local supplier
(drugstore, laboratory, etc.).
2. Remove the pressure cap from the coolant fi ller
neck and insert one end of the litmus paper into
the coolant.
3. If red litmus paper turns blue, coolant is alkaline
and does not need to be replaced. If the litmus
paper remains red, the coolant is not alkaline and
must be replaced.
DRAINING FRESH-WATER PORTION OF THE
COOLING SYSTEM
NOTICE: To protect the environment, dispose of
coolant properly. Check your local restrictions for proper
disposal instructions of removed coolant.
NOTICE: In order to drain the raw-water portion of the
systems, refer to WATER FLOW DIAGRAMS section of
this manual for proper locations.
Remove the following drain plugs/hoses in order to drain
the coolant from the fresh-water portion of the cooling
system.
5.0/5.7L Fresh Water Cooling
A. Fresh-Water drain plug from heat exchanger.
B. Drain plug from coolant pipe as shown in Figure
11-11.
C. Drain plug from each side of the cylinder block,
these will be the knock sensors.
D. Remove the hose and/or drain plug from the
bottom of each exhaust manifold.
E. Remove the drain plug from each riser, if
applicable.
46
Figure 11-11 Draining Engine Circulating Pump
(5.0/5.7L)
6.0L Full Fresh Water Cooling
A. Fresh-Water drain plug from heat exchanger.
B. Remove large hose from the engine block water
circulating pump.
C. Drain plug from each side of the cylinder block.
D. Remove the hose and/or drain plug from the
bottom of each exhaust manifold.
E. Remove the drain plug from each riser, if
applicable.
6.0L CES Full Fresh Water Cooling
A. Fresh-Water drain plug from heat exchanger.
B. Remove large hose from the engine block water
circulating pump.
C. Drain plugs from each side of the cylinder block.
D. Remove the hose and/or drain plug from the
bottom of each exhaust manifold.
E. Remove the drain plug from each exhaust
corner.
NOTE: After the system has drained completely, coat
drain plugs with PerfectSeal (or equivalent) and reinstall
in proper locations. Reinstall hose(s) and tighten clamps
securely as required.
L510001-13
Remove DRAIN PLUG
(as equipped)