Coolant System Testing; Coolant (Hydrometer Test); Coolant Specific Gravity Chart - Honda Metropolitan CHF50 Service Manual

COOLING SYSTEM
COOLANT SYSTEM TESTING
COOLANT (HYDROMETER TEST)
Remove the four screws and radiator cover.
Remove the radiator cap.
see
Pinch the siphon hose with a hose clamp.
Test the coolant gravity using a hydrometer
below for "Coolant specific gravity chart").
For maximum corrosion protection, a 1:1 solution of
ethylene glycol and distilled water is recommended
(page 6-6).
Look for contamination and replace the coolant if
necessary.
HYDROMETER
COOLANT SPECIFIC GRAVITY CHART
c
CD
O
CJ
5
10
15
20
25
30
35
40
45
50
55
60
Coolant temperature C (°F)
0
(32)
1.009
1.018
1.028
1.036
1.045
1.053
1.063
1.072
1.080
1.086
1.095
1.100
5
(41)
1.009
1.017
1.027
1.035
1.044
1.052
1.062
1.070
1.078
1.084
1.093
1.098
10
(50)
1.008
1.017
1.026
1.034
1.043
1.051
1.060
1.068
1.076
1.082
1.091
1.095
15
(59)
1.008
1.016
1.025
1.033
1.042
1.047
1.058
1.066
1.074
1.080
1.088
1.092
20
(68)
1.007
1.015
1.024
1.031
1.040
1.046
1.056
1.064
1.072
1.077
1.085
1.089
25
(77)
1.006
1.014
1.022
1.029
1.038
1.045
1.054
1.062
1.069
1.074
1.082
1.086
30
(86)
1.005
1.013
1.020
1.027
1.036
1.043
1.052
1.059
1.066
1.071
1.079
1.083
35
(95)
1.003
1.011
1.018
1.025
1.034
1.041
1.049
1.056
1.063
1.068
1.076
1.080
40
(104)
1.001
1.009
1.016
1.023
1.031
1.038
1.046
1.053
1.060
1.065
1.073
1.077
45
(113)
0.999
1.007
1.014
1.021
1.028
1.035
1.043
1.050
1.057
1.062
1.070
1.074
50
(122)
0.997
1.005
1.012
1.019
1.025
1.032
1.040
1.047
1.054
1.059
1.067
1.071
6-5