I am happy & satisfied user of Passo for a year now. There's been some glitches over the course but all in all, it went smooth.
I was traveling few days back to my home town, a journey which i take every weekend. During last commute, car heated up (although weather was way less hotter then other weekends) anyways i immediately parked the car, kept the engine running, carefully removed the radiator cap,let the steam blow out, poured in fresh water,temp went down, i resumed my journey and travelled 30kms without any car heatup issues to my home.
It was the first time my car got heated up, i do regularly check the water levels in the bottle and radiator, they were always upto mark. Water in the radiator was full of rust, i reached home and opened the manual of car. At this point i realized that proper coolant should be used and it was written in the manual to use 4 ltr of "toyota super longlife coolant". I went to toyota 3S in abbottabad and bought this coolant. Price was PKR 3700/- for 4 litre pack.
Now my question is, should i go for full service of the radiator or should i just flush it clean and then top it up with coolant?
I drove car around since the heatup incident, in heat, in heavy traffic congestion and it didn't heatup again and there is no drop in water levels as well. So may be only flush is enough? And someone told me that dont go for full radiator service as they will open the original seals of the radiator and it won't be same again. should this be of any concern? or is it just "one of those stories"?
Toyota guys quoted PKR 1500 for full radiator service. PKR 500 for the flush (removal of radiator, water drain, filling of coolant, fixing back the radiator)
Toyota mechanic was saying that its better to fully service the radiator as "زنگ کی وجہ سے ریڈیٹر کی نالیاں چوک ہو گئی ہوں گی، صرف فلش کرنے سے زنگ نہیں جائے گا"
Any help/suggestions will be much appreciated.
P.S: @xulfiqar pointed out in one of his posts to mix this coolant with 50/50 water to coolant ratio. Packing on the other hand says, no dilution necessary. Who to follow?