I have been facing some problems with my Alto, two of which have not yet found any resolution. Please find them enlisted & explained below:
Problem no.1. During cold starts, a very harsh noise comes from the engine. It sounds as if there is friction somewhere or, that some part is struggling to move. The sound vanishes completely after some time i.e. when the engine has warmed up. The duration for which this sound persists has also increased with the onset of winters. Also, an observation was that the sound dissappears when the clutch pedal is depressed.
Problem no.2. There is pinging in the engine when it reaches high rpms, irrespective of speed or gear. This has started increasing with time, & the problem seems to be due to faulty timing as every time, it becomes advanced on its own. It’s some thing like, if I would get the timing set now then it would go back to advanced (by the same measure) by evening max.
I have also tried using petrol from the best petrol pumps, even premium petrol. Strangely though, with premium, the pinging increased. So reverted back to normal petrol. The A.S.S. guy says it could be the valves & another mechanic (outside A.S.S) says it could be the distributor which develops play & leads to this problem with timing getting disturbed. Plus, nobody is sure, they say it can be multiple problems as well.
Please help guys. The car has run more than a lac now, without any mods. It’s a make of year 2004, in case there were some differences then in the technicals of the car.
Looking forward to getting some valuable advice/suggestions.
@Mods: I searched for threads containing resolutions to these problems, but couldn’t find anything that I could use. I request you to please put up some links here in case I may have missed them out.