How much engine Oil?

Blockage in the exhaust is quite likely a cause.

Question edited for clarity.
Question moved to model category.

replacing the belt

https://www.google.com/search?q=daihatsu+sirion+gtvi+replace+serpentine+belt

Bolt suppliers and changing help.

https://www.google.com/search?q=daihatsu+sirion+gtvi+drive+belt+tensioning+bolt

..

Question edited for clarity, make and model name.

C1241 Daihatsu Move OBD/2 Code

http://www.engineobd2codes.com > c1241_daihatsu-m...
C1241 engine code repair process and OBD-2 meaning of C1241 ABS Hydraulic Pressure Differential Switch Input Short Circuit To Ground with DTC manual.
Missing: 2007 ‎1.5,

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  C1241 Daihatsu Delta OBD/2 Code

  http://www.engineobd2codes.com > c1241_daihatsu-delta
  C1241 engine code repair process and OBD-2 meaning of C1241 ABS Hydraulic Pressure Differential Switch Input Short Circuit To Ground with DTC manual.

Daihatsu Sirion C1241 Engine Trouble Code

http://c1241.enginetroublecode.com > daihatsu-sirion
Car not starting. If one of these reasons for C1241 code is occuring now you should check C1241 repair processes. Now don't ask yourself; What should you do ...

which oil filter...petrol or engine oil filter

Variable Valve Timing System Malfunction, and possible causes - dirty or low engine oil
- Valve timing
- Oil control valve
- Variable Valve Timing controller assembly
- Engine Control Module (ECM)

Read more: http://engine-codes.com/p1349_toyota.html#ixzz38fIMYdTd

Are you after 'changing the power steering oil'?? As your typing seems to have given some odd answers.. If YES.. power steering oil, then you should know there is NO need to ever change this oil.. However, it SHOULD be a reddish colour.. if it is deep black, or smells 'burnt' that is a sign that there is other faults and therefore needs investigation. If on the other hand, there is no deep black colour, a reddy brown is NORMAL and just continue to top up.. I hope this answers your question. Ok?

without my head under the bonnet i suspect that the head gasket has failed ,the oil feed up into the head is leaking into one of the pistons or its drawing oil up the engine breather but without my head inside the engine i honestly couldnt tell you and i defy anyone to say they can so please visit a local mechanic and see what he says

how did you get on with this? i have the same problem..

Many Auto Parts stores have the computer that specify oil weight, quanity needed and viscosity type and filter type and location.

Your engine is probably an EJ-DE twin cam 12 valve.

Generally Daihatsu belts have marks on them that line up with dimples on the sprockets for the intial phasing. You rotate the engine to top dead centre on No1 piston and install the belt from there. The cams should be not be putting any pressure on the intake and exhaust valves of No1 when phased correctly.