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Home >> Nissan-Datsun >> 2002 >> Sentra SE-R, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2287 (Engine Control System - DTCS P1211 Through P2A03) >> DTC P1217 Engine Over Temperature >> Main 12 Causes of Overheating
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Main 12 Causes of Overheating

WARNING: This page is about a different car, the 2006 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
OVERHEATING CAUSES

Engine Step Inspection item Equipment Standard Reference page
OFF 1
  • Blocked radiator
  • Blocked condenser
  • Blocked radiator grille
  • Blocked bumper
  • Visual
No blocking -
2
  • Coolant mixture
  • Coolant tester
50 - 50% coolant mixture ANTI-FREEZE COOLANT MIXTURE RATIO
3
  • Coolant level
  • Visual
Coolant up to MAX level in reservoir tank and radiator filler neck CHECKING RADIATOR
4
  • Reservoir tank cap
  • Pressure tester
59 - 98 kPa
(0.6 - 1.0 kg/cm2 , 9 - 14 psi) (Limit)
CHECKING RADIATOR
ON(2) 5
  • Coolant leaks
  • Visual
No leaks CHECKING RADIATOR
ON(2) 6
  • Thermostat
  • Touch the upper and lower radiator hoses
Both hoses should be hot WATER OUTLET AND WATER PIPING
ON(1) 7
  • Cooling fan
  • CONSULT-II
Operating See trouble diagnosis for DTC P1217  ( ).
ON(2) 7
  • Cooling fan (Crankshaft driven)
  • Visual
Operating See ENGINE COOLING FAN .
OFF 8
  • Combustion gas leak
  • Color checker chemical tester 4 Gas analyzer
Negative -
ON(3) 9
  • Coolant temperature gauge
  • Visual
Gauge less than 3/4 when driving -
  • Coolant overflow to reservoir tank
  • Visual
No overflow during driving and idling CHECKING RADIATOR
OFF(4) 10
  • Coolant return from reservoir tank to radiator
  • Visual
Should be initial level in reservoir tank CHECKING RADIATOR
OFF 11
  • Cylinder head
  • Straight gauge feeler gauge
0.1 mm (0.004 in) Maximum distortion (warping) INSPECTION AFTER DISASSEMBLY
12
  • Cylinder block and pistons
  • Visual
No scuffing on cylinder walls or piston INSPECTION AFTER DISASSEMBLY
(1) Turn the ignition switch ON.
(2) Engine running at 3, 000 rpm for 10 minutes.
(3) Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
(4) *4: After 60 minutes of cool down time.

For more information, refer to "OVERHEATING CAUSE ANALYSIS "