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Engine oil specifications for Peugeot 306 1.6 petrol engine:
1. SAE 5W-40, API SH or SG, for temperatures between -30 Celsius deg. and +40 Celsius deg. 2. SAE 10W-40, API SH or SG, for temperatures between -15 Celsius deg. and +40 Celsius deg. 3. SAE 15W-40, API SH or SG, for temperatures between -10 Celsius deg. and +40 Celsius deg. 4. SAE 15W-50, API SH or SG, for temperatures between -10 Celsius deg. and +50 Celsius deg. 5. SAE 20W-50, API SH or SG, for temperatures between -5 Celsius deg. and +50 Celsius deg.
P0128 is Coolant Thermostat ( Coolant Temp Below Thermostat Regulating Temperature ). The thermostat may be stuck open, preventing normal operating Temperature from beeing reached.How is the heat inside the car is it below normal ? Or the engine Coolant Temperature Sensor may be faulty and needs to be replaced. Good Luck and have a good XMASS.
There are two primary symptoms of a faulty thermostat (assuming you mean the coolant thermostat in the engine not the A/C Heater Thermostat). The thermostat can fail in basically two ways:
1) Stuck open - Engine runs colder, heater takes forever to heat up.
2) Stuck closed - Engine runs very hot, then will suddenly drop in temperature, then run very hot again. Or engine overheats constantly. When the engine is hot, feel the upper radiator hose. If it is not hot, you can bet the thermostat is stuck closed. If it is hot, the thermostat may not be stuck close, but not opening at the proper temperature.
Stuck open is annoying, but not dangerous. Stuck close is dangerous and can cause overheating-related damage to your engine.
If you are handy, you can replace it yourself. Otherwise it is an easy job for a mechanic.
Not really because the thermostat may be fine and the light will still be ON. If the guage is NOT working it will trigger check engine light. First you should fix guage, it probably needs a temperature sensor or sensor wire may be broken. Check it out, good luck.
REMOVAL 1.Drain the coolant so its level is below the thermostat. 2.Remove the inlet fitting and gasket. 3.Remove the thermostat
INSTALLATION
1.Check that the flange of the thermostat is correctly seated in the socket of the thermostat housing. 2.Install the inlet fitting. Tightening torqueEngine coolant inlet fitting bolt :10 ~ 15Nm (100 ~ 150kg.cm, 7 ~ 11lb.ft)3.Refill the coolant. INSPECTION 1.Heat the thermostat as shown in the illustration. 2.Check that the valve operates properly. 3.Verify the temperature at which the valve begins to open.Valve opening temperature : 80-84°C(176-183.2°F)Full opening temperature : 95°C(203°F)
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