Asalam O Alaikum,
I need your suggestions and opinions about a problem that I am facing with my Suzuki Cultus 2004 (carburetor) car. Before going towards the problem some info on the engine condition:
a) The engine has clocked 88000 kms so far out of which around 21000 kms were on petrol.
b) The engine has never been opened and is running on genuine everything including gasket and rings etc.
c) The car does not reduces any oil no smoke at morning start ups or otherwise.
d) Till last year the car was running on automatic fan in summers with thermostat valve with a/c and no heat ups. its still running the same way but summer hasn't arrived yet.
Now the Problem:
The problem i am facing is of Tappet noise. It has hydraulic tappets which are producing a considerable Tuk Tuk noise. Some observations about the noise include:
a) The noise is very less when i drive on petrol but is pronounced on cng.
b) On cng when i stop at a signal for around 30 seconds there is no noise at all but if the car remains on idle for more than that the Tuk Tuk sound appears. If i rev the engine again for some time it disappears.
c) When the car is standing at an incline like a house entrance on idle the noise starts coming.
d) I have noticed that the car gains heat and temperature needle comes to the middle a bit more quickly now but remains there and no further heating. this might be a Weham as the climate is changing these days.
Now my old mechanic says that the oil pump needs to be changed as its not pumping oil with full pressure and in cultus the tappets are running on its pressure. he also says that instead of changing the genuine pump an oil pump kit can be bought and used in the same pump.
I also took a second opinion from a mechanic and he suggested that we need to open the head and get the tappets redone from a kharadia.
I have grounded the car for the moment and looking forward to your prompt and valuable diagnosis and suggestions. i am hesitant to get teh car opened as it is perfect so far.
@Xulfiqar and other senior members your help and diagnosis will be highly appreciated.
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