Hi, as per title, plan to do top overhaul on my wira 4g13 MMC injection. would like to enquire about parts n process involve during top overhaul. My car got leaking for a while now, so instead of changing the gasket only, I prefer to make it one time job. Not interested in full overhaul/engine rebuiding as the cost might as well buying new engine/car dp.

Parts:

1) Head gasket
2) Valve seal
3) Valve cover gasket
4) Valve guide? valve seat?
5) Intake manifold gasket
6) Other cheap2 oil seal and gasket (oil sump gasket, crankshaft oil seal)<--help me to list this

Open up a little bit further, u can also replace ur piston ring or conrod bearing as these thing also has its wear and tear.

Process

1) Head skimming (i think this is important for 15 years old engine)
2) valve grinding (not sure what is this, care to explain? )
3) Wash parts with petrol (esp parts when u open rocker arm cover
4) Cleaning/ decarbonise parts (piston head, intake manifold etc) most cheap overhaul w/shop will skip (3) and (4). Am i rite
5) You can also opt for Port and Polish while you at it. But is it advisable to do just polish?
6) (Help me to list out other major process involving head, valve, piston or the block maybe?)

As for the parts part, what else that could help in engine performance and high wear and tear rate? piston, valve itself? Thing is i plan to buy the necessary performance part myself, any part and brand to recommend?

Not all workshop capable of doing above process, so they ll sub it to machinist, hence higher cost. Those process might need professional touch, at least for me. If u happen to do or have recommendation of such workshop, u can list it here also.

Think any engine will share more or less of above information. So please share your experience!

This post has been edited by colex08: Jan 24 2014, 10:04 PM

can i tumpang thread? i also drive 4g13 1.3 injection satria manual. i also plan to top overhaul my car. the mileage already 210++km. i can see leaks at the head, going to manifold. car jalan as usual, but the leak is quite bad. no white smoke, but a little revving shows some. im afraid if the car jammed and cant start anymore. is top overhaul recommended for my case?

my aircond compressor rosak already. also when i on aircond when the car is idle, the temperature rising slowly, but i off the engine quickly.

Top overhaul potong,

no cars should do an overhaul if maintained properly, change oil, wear and tear parts and do repair when needed to ASAP... If any overhaul is > car price, u might as well top up to get another second one...

piston rings, conrod bearings, main bearings all will be considered full overhaul already which requires the oil sump to come out where you can remove your crankshaft and conrods.

the #1 tool you need to perform a top overhaul though, is a TORQUE WRENCH. I had a friend who removed his head, without knowing he had to use a torque wrench to put it back together. Let's just say he's lucky some of his friends found out the error before he started putting it all back together.

Valve grinding you can find online how to do. You also need to know how to set the timing of the crank and cam correctly on the cam pulley and timing gear. Head gasket, valve seals and all required seals usually will come as an overhaul kit in a package.

To get the cam pulley out, I'm pretty sure you need a air gun for that, but you can try to remove it with normal hand tools as well.

hi, good info to share. just noted that the piston will remain inside block when doing top overhaul.
as for the torque, i dont think all foremen will follow exact reading, but as u said, it is important. otherwise whats the point of skimming head.

kamaryu, if thats the only problem, i dont think ur compressor faulty. have u check cooling pressure or any leak? just dont simply change ur compressor, they do make big money out of it.
You can either change the head gasket only, but it ill cost u 150-250 easily for the labour. the white smoke could be something to do with the valve. if u want give it a try, do the top first.