UPDATE
Today I checked the newly installed rear shock absorbers with 5 people on board. On normal bumps there is no noise now, however if the speed is high, then it produces noise from rear left side. I think its not a fault, with 5 people plus cylinder, the weight is already above the prescribed limit and hence speed must be reduced in such cases. Also, if I go for thicker springs then the ride comfort will be compromised. Moreover, this car is driven with one or two people most of the time, so the current springs are fine for me. The ride comfort is super good now. Earlier it used to jump on bumps, now its smooth. Even the minute noises in trunk or rear doors are eliminated now.
Today the car stalled and I thought the petrol is finished. The newly installed fuel sending unit is still showing 30% fuel in tank. Went to mechanic and he said that the fuel filter has water in it. Replaced the fuel filter and car started on petrol but after few kilometers at night it again stopped working on petrol and I had to convert it on CNG. Will go to the workshop again in the morning to check the quantity of fuel in tank.
The other day mechanic adjusted the generator and brake pipes a little bit and now in morning the trrr trrr noise is reduced. It is still there but it comes for 1/4 of a km now, earlier it kept coming for two kilometers or so, plus the loudness level is reduced. The noise of piston pins is also there which sounds like a donkey pump but I can tolerate it, and the change in oil might reduce it as well.
By the way, still no delivery from ZIC oils. No response on email.
