HI I WANT TO ASSEMBLE CHEVY SONIC 1.4 VVT 16V USING CAM CHAIN NON TURBO 2012 CYLINDER HEAD BACK CAR OVERHEATED SKIMMED AND PRESSURE TESTED ITS OK I NEED TIMING MARKS

no country told , matters! for sure no USA. KM speeds tell that. GUESS Australia????
down under IRON./? or the exported Austrilia to Africa.???

won't rev out (means RPM limited,means low power from engine. so means engine power is lost.
and NOT:
not transmission slip. (none told A/T or stick?)
good post, lots of causes for any kind of engine power loss
I will not pretend to guess it but in terms of physics yes.
engine has mech problem , cam belt slipping then changing back.
engine low power.
does 4LT mean 5liter engine, or 4L +LT MODEL CAR
The BA sub model falcon? IDK
wiki says

• 4.0 L Barra 182 I6 (petrol)
• 4.0 L Barra 240T I6 T (petrol)
• 4.0 L Barra E-Gas I6 (LPG)

seems there are 3 engines used, day1 sold,
gas Petrol
turbo petrol (gasoline)
and LPG (propane) gas.

deep wiki' me.
182 is 6 cylinder DOHC cam engine with pesky VVT valve timing
chain drive cam +VVT
VVT can stick so there is my first physics IDEA on engine problems.
or stick head valve.

the classic list, (means what is tested in order.) using tools.
1: good engine, means all tests pass,and VVT'
2:good spark ever do a tune up in 20 long years,spark + filters.
3: bad fuel, or bad fueling rates. , fuel pump on lasts legs. sure.
4: egr struck open ,even random they do.
5:;random bad wiring to all that.

that is my best, 12,000 miles away and blind, cant see car engine or transmission there.

no year car told ( wow a real hard challenge that)
there ALWAYS IS.
there in no cam on earth that is timing free (aside carnival acts year 1900 ,) even the oldest weaving looms had cams and programs ,cardboard tapes. (see series connections by james berk.
is this a USA car/ never heard of that maker ever.
here.
is the word VW too hard to say>? just 2 letters.?
1975 to present wiki stated.
gen5 polo diesel or gas 1.6? 2014?
no the the sprockets have timing marks not the chain the chain just does not car but the cam does and is even more complex is VVT is here (SAE /ASE term, VVT) v

1.6 R4 16valve DOHC?

no data on this side of big pond (Atlantic, USA) zero here
buy the shop manual first, none here.
and learn this facts.
DOHC engines are 99% of them INTERFERANCE engines.
if timed wrong (cams) the engine bends the valve over and even worse (train wreck) heads cracked,piston tops wrecked./

No problem told at all just HUNT, can we know that? what's up"
all but country told a major good post here, knows whats under hood too.
well it is on the cam for sure, or it could not read it.
the question is how many are there, Some DOHC have 2 CMP sensors ,
I will read your SM service manual to you now, (so could you )
all my answers are USA using a real SM for our cars here.
that is the Mazda L3 engine,
ok is IS DOHC , twin CAM head and chain drive, GOOD.
it shows VVT there if VVT fails so can spark.
CMP has only 2 pins, (so is not HALL sensor so is weak)
Okay I read ever PCM Pins, and only ONE CMP this car.
so now where is it at. knowing its only 1.
some VVT engines run 2x CMP. to get better accuracy
how to fish,. read the SM, see the chapter, locations
see engine locs
see this.

warped block or cracked head

images for How to remove a gear to gear timing cam ...

DIY Timing Chain and Gears Removal - YouTube

? 6:31
https://www.youtube.com/watch?v=eMXO1bvUCMs
Dec 30, 2012 - Uploaded by Bullshitkorner
The most important part when doing timing gears on a engine is ... Doing this inside the engine bay will be a bit of a pain in the axx but it is doable for sure. ... How to build a Chevy 383 Part 3: How To Install a Cam & Timing ...

Head removal & replacement, Timing Chain & gears also ...

? 3:28
https://www.youtube.com/watch?v=CnXtwR1N0Og
Apr 28, 2012 - Uploaded by No1hmfic Gibson
Head removal & replacement, Timing Chain & gears also, 97 Chevy S10 2.2 ... replacing the head gasket in a chevy cavilier 2.2 liter 4 cylinder - Duration: 9:38. ... 98 S10 Vortec V6 4.3 Intake Gasket Replacement Part 1 of 5 ...

Chevy S 10 2.2 L Engine Timing Chain Replacement Guide ...

? 7:30
https://www.youtube.com/watch?v=8nX5HARPSF4

follow this link for the bolt torques and i would get a good workshop manual for the rest of your work as will be complicated and must be done in precisely the correct order
http://www.speedwayautoparts.com/index35.htm

You should have the cylinder head pressure tested for cracks, Also, remove the oil cooler located above the oil filter and have it pressure tested for leaks.

no year,stated, and no country stated.
google earth cant find hill 13. so......
is transmission slipping? is it and automatic trans.? not stick shift.

slip means , engine RPM rises fast, but car speed does not.
some think that is power loss and is not. it's just slipping.
slip is transmission problems.
ok its not slip.:
which engine?
1.0 L G10 (LP2) I3
1.0 L G10T (LS3) turbo I3
1.3 L G13A/BA (L72) 8V I4
1.3 L G13B/G13K 16V DOHC I4
1.5 L G15A 16V I4
1.6 L G16 16V I
970 cc F10A I4
1298 cc G13BA I4
1298 cc G13BB 16V EFi I4
1527 cc TUD5 diesel I4
1.3 L M13A I4 (petrol)
1.5 L M15A I4 (petrol)
1.3 L I4 (diesel)
so saying my engine acts odd , is useless with out knowing what engine is there.....see why?

ill then answer for generic engines. GAS or Petrol.

1. never tuned up the engine in a decade, tops list.!
2. bad fuel,
3. weak spark or #1 caused.
4. cam belt slipped do to no service, (or chain on cam)
5. Low fuel pressure
6. or too much fuel pressure ,floods or rich misfires.
7. misfire. causes low power ., lots of causes. over 50, in fact.
8. The CLuster Check engine light on? running?
9. Scan the PCM yet to see if it has DTCs; errors to report?

there are steps or tests in each case.
why not get the car serviced. they will do those tests.

Look on YouTube for videos showing how to replace the timing chain on your car. Even if your particular model is not shown, there may be other car models or other years that use the same engine or a similar engine that are covered on Youtube