no need dismantle engine to blast kah ?

I seen all in Malaysia down with cylinder head still installed

bye bye engine

it's just curing the symptom not the problem

and tearing the head off affects so many other things , coincidentally fixing whatever your initial problem was, that's the right way to do it

just one blast of wallnut shells into valve that was forgotten to be closed , you are well and truly bollocked on that cylinder

like you said, unless there is a problem already that can't seemed to be fixed then try it and remove the head.

if just for Syiok sendiri , engine running fine, no CEL , why place such danger for no benefit at all

no , this is knowingly putting a very harmful material into the engine to fix something which is not a problem , no cel, no rough idle , no nothing

and there is no safe control, just one small tiny mistake forget to close the valve and you are done for, there is no going back , the cylinder will be filled and should require removal of head for proper cleaning

same goes for overhauling , if there nothing wrong go overhaul for what ? too free go and catch worm and sumbat into bontot ?

I bet you their biggest customers are sohai port injection engines Syiok sendiri

if it's not broken don't jerk around with it

perfect running engine can be ruined with one simple mistake

preventive is using good oil, change good filters in time .

not introduce risky damaging procedures for zero gain

when it work no benefit , when it goes wrong totally destroyed.

again apply.the rule

is the engine suffering check engine lights?
is the engine struggling to run properly ?

if both of these are a no , don't friggin touch it . Engines are so complex on monitoring themselves they will tell you when stuff  is broken

again the question of what you want to risk vs benefit.

so okay you removed the 2cm , but engine feels the same, runs fine as before so what did it do ? nothing

but make that mistake and you are happy to say , yeah I buggered one cylinder but my other 3 valves are clean eh, eh ,eh, I'm smart like a fox

if you're building 2cm  thick on valves, the engine is buggered anyways and it's a probably a crap beater car that no one really cars about anymore.

and yes if there's no light i'll leave it. until it's broken then fix it because then it can't be buggered anymore worse than it already is.

do you do chemo just in case, since it kills cancer, why not do it like every 5 years once just to be safe?

same concept

I'm not sure how you get the idea that inside the cylinder is like a  wood stove or some magical field keeping walnut shells floating about until combustion

mate, the cylinder is an oily place inside , either from engine oil or the petrol , whatever got in is going to stick like.glue to the oily surfaces especially the finest ones , so now you have this lovely coated walls with fine abrasives just waiting for the piston come and drag them along the walls up and down over and over.

doesn't that sound a lot like honing cylinder walls ?
exactly the symptom

'  I HEARD is soft '

' I have haven't done it before too '

before you all so support it , why not present the risks involve and why should someone not do it and understand what the proper way of doing it entails

not just plainly support it without really having tested it themselves before

so far only one post who said it did help but it was already. last resort to a bad running car , what else could.be worse than to try .

I don't care what marketing wank these so called experts provide , either you remove the head, use traditional solvent nd elbow grease or use dry ice , co2 blasting method to clean , or like every other industry standard the part is blasted away from work area , put into parts washer then reinstalled

blowing abrasives all over your engine is the right way to break everything which is not broken

again is yr money, your engine , if you feel overwhelming need to support them , go ahead. I just want those who want to know more to just stop and think ' oh yeah hor, really need or not'.

traditional cleaning is absolutely fine aiyohhhh, solvent based cleaning even if valve open is nothing, everything is liquefied and carbon is nothing the engine hasn't seen already .

is the use of abrasives in the completely wrong and dangerous way

I know I not ang moh so I cannot be trusted , just go YouTube and see yourself, every single video will mention at least once , if you don't prevent the walnut from entering the engine , it will kill the motor , same message every video .