Main 12 Causes of Overheating
ENGINE OVERHEATING DIAGNOSTIC CHART
| Engine |
Step |
Inspection item |
Equipment |
Standard |
Reference page |
| OFF |
1 |
- Blocked radiator
- Blocked condenser
- Blocked radiator grille
- Blocked bumper
|
|
No blocking |
- |
| 2 |
|
|
50 - 50% coolant mixture |
See
"FLUIDS AND LUBRICANTS
". |
| 3 |
|
|
Coolant up to MAX level in reservoir tank and radiator filler neck |
See
"CHANGING ENGINE COOLANT
". |
| 4 |
|
|
98 - 118 kPa (0.99 - 1.20 kg/cm 2
, 14 - 17 psi) |
See
"SYSTEM INSPECTION
". |
| ON |
5 |
|
|
No leaks |
See
"SYSTEM INSPECTION
". |
| ON |
6 |
|
- Touch the upper and lower radiator hoses
|
Both hoses should be hot |
See
"SYSTEM INSPECTION
". |
| ON |
7 |
|
|
Operating |
See
"EXPLODED VIEW
". |
| OFF |
8 |
|
- Color checker chemical tester 4 Gas analyzer
|
Negative |
- |
| ON |
9 |
- Coolant temperature gauge
|
|
Gauge less than 3/4 when driving |
- |
- Coolant overflow to reservoir tank
|
|
No overflow during driving and idling |
See
"CHANGING ENGINE COOLANT
". |
| OFF |
10 |
- Coolant return from reservoir tank to radiator
|
|
Should be initial level in reservoir tank |
See
"SYSTEM INSPECTION
". |
| OFF |
11 |
|
- Straight gauge feeler gauge
|
0.1 mm (0.004 in) Maximum distortion (warping) |
See
"EXPLODED VIEW
". |
| 12 |
- Cylinder block and pistons
|
|
No scuffing on cylinder walls or piston |
See
"TROUBLESHOOTING CHART
". |
For more information, refer to
"TROUBLESHOOTING CHART
".