my 1.3 76hp punto,60k run,is showing signal for glow plug failure.I have shown this to fiat service station here at my place(patiala,punjab).they told me that the glow plug is stuck in socket and even can break if tried with force. in case of a break ,they dont take any responsibiliy and whole cost of opening head(around 20k) will have to be paid my me. what should i do? if i continue to drive car in this condition. what can be the long term effects on engine/car.