A little update. I sent my car to my personal mechanic, it's confirmed that they never change the engine or valve. Even the mounting is screwed.

So I took the car back to Siang Hin on Sunday, told them that I need the valve and engine to be changed or at least fixed. Coz if I continue to have low power and high FC like this it will continue giving me problem and I will continue sending it back and it's not good for both of us.

Siang Hin feller : But we have changed the valves for you.
Me : Nope, my friend is a mechanic, he checked and even show me that the valve is not changed, or maybe you guys bought scraps to replace and it is doing my car no good. I want it to be replaced with new parts because it is your workshop's fault that my car end up in this condition.
Siang Hin feller : We will consider. (that means he admit that he cheat me la)
Me : I wanna speak to your boss.
Siang Hin boss : I am the boss (a lady)
Me : Alright, so your boys spoilt my car, I need the valves to be changed or at least fixed. (repeat the problem above)
Siang Hin boss : We shall take responsibility.
Me : Alright.

Few minutes later.

Siang Hin feller : Miss, your car leak black oil, need to refill.
Me : How come leaking? Last time you guys fixed it ma.
Siang Hin feller : (totally ignore my question) Miss, you wanna buy which black oil?
Me : Why should I buy when you guys are the one who spoilt it? It never leak until you guys lay hands on it.
Siang Hin boss : Miss, changing timing belt have nothing to do with black oil.
Me : When I sent my car back for the third time, it's already leaking. (calling my mechanic - he said yes, it might caused rupture when timing belt pulled my engine senget)
Siang Hin boss : We will not fix the leakage.
Me : Alright, I'll make sure I update the tribunal.

And now my car is still with me, still leaking engine oil. Waiting for tribunal to do things would be very long. Valve not changed. No complete overhaul. Blah..... life sucks for me now.

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Added on March 25, 2008, 9:47 amI found something
http://forum.lowyat.net/topic/628644

Senior Manager from the HQ called me ask me to send my car there. So I'm sending it after work 

Let's see how things goes

My logs :
8 Mar - Sent to Siang Hin for service at 12pm. Went to lunch from 1pm to 2pm. Observe the fixing from 2pm onwards. Saw with my own eyes they screwed up at 5pm.
10 Mar - Collect the car at 7pm. Test drive during traffic jam from Siang Hin Jln Tun Razak road to Jalan Loke Yew, car died when idle at the ramp up to UE3. Died during idle another time near the junction to my place.
11 Mar - Sent back to workshop to fix the die when idle problem.
12 Mar - Took back the car at 6pm.
13 Mar - Noticed engine oil leakage. Sent back to workshop.
14 Mar - Took back car, bring back to apt. Get a mechanic friend to help me check, valve is unchanged, no overhaul is done. Pissed off.
16 Mar - Back from outstation. Sent car to workshop.
17 Mar - Took back car. They claimed that overhaul is done. Noticed the RPM is way higher than normal. Sent back to workshop.
18 Mar - Took back car. RPM stable at 1 this time. Test drive in traffic jam and on highways. Still shaky when reach 90kmph.
24 Mar - Still no power and shaky, ask mechanic friend to help me see. He said no overhaul is done and I'm taken for a ride. And my engine oil left half tank only! The oil is leaking from valve bearing!
25 Mar - Sent to workshop together with my mechanic friend. They discussed things that is damaged and need change. Left it there.
27 Mar - Went to collect car with mechanic friend. Overhaul is done, leakage is fixed. Still gonna test drive for a few days.

No leh...

Noticed leakage when engine is hot. Aih...

Sending back to workshop Leakage is significant when engine is hot

Tribunal is helping, else they won't fix it for me So far so good, driving had been smooth and no leakage spotted. Warranty period over for me (they said 1 month), so if any problem after they won't be responsible. Sucky excuse, but have to accept.

Pray that nothing will go wrong

Now we are still arguing whether the warranty starts on 8th March and end on 8th April OR start counting from the day I got back my car. You know how licik they are lah...