Tappets and throttle body has been done. But it think that slight tic tic sound is natural to this engine.
There is some other sound that they hear and diagnose it as something coming from inside the engine, may be pistons, cylinders or something. On inquiry, they say, it indicates, "engine ko maar padi he, or ye weak engine ki nishani he, isilye previous owner 20w50 oil use kar rha tha or ye ab isilye sunai de rha he q k aap patla oil use kar rhe hen, behtar hoga abi aap chalaein, jab oil reduce krna shru karay, tab engine change krwa lena." Will let you hear that sound soon.
Btw, about 5w40, I think of to go for shell helix ultra. What say? For caltex I can't find any distributor here. Here shell is abundant.
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