hi, anyone got good workshop for this, gdi walnut blasting service, can recommend? As long in Selangor/KL or Seremban area. Thanks. Car is Proton X series with 70+ k km now

Zordaq in bangi quite famous

Your ride still got warranty or not? If got warranty dont simply go out let other people do, if not later engine got problem they gonna blame u go out do and void warranty.

still got warranty. told by many workshop to do walnut blasting due to gdi after high mileage

Dont stupid go out do extra, if got warranty go back SC and complain if engine got problem at least they help clean or claim without impacting the warranty. Once after warranty finish only go out do, if not later anything happen they gonna blame u go out do without their consent.

I believe 70k is still not that high. My family owns an X70 with 120k+ KM mileage. It is still running smooth like new (albeit we just made a claim for a new gearbox). Retain your warranty and talk to your service advisor if you feel your car not performing as it should.

i read one CX5 owner on FB, CX5 also come with GDI, got jerking, but SC unable to solve his even with Spark Plug change. That why ask is it better with Walnut, some mentioned no need cz warranty



This post has been edited by ayamtriplex: Aug 12 2024, 11:13 AM

No doubt walnut blasting has been done a long time. But modern engines very rare carbon build up badly (less than 100k mileage la, I can be wrong). Unless you skip or delay oil changes and lenjan the car everyday, then maybe.

Is your car jerking? Or significant performance drop?

getting a bit higher FC once passing 50k km onwards. This based on the meter per full tank. Jerking nope, smooth, I think similar as day 1

This post has been edited by ayamtriplex: Aug 12 2024, 12:55 PM

Carbon build up in GDI engines will be more serious if your car spends a lot of time in stop and go traffic or short distance travel. There's a thing call Italian Tune Up that will help prevent excessive build up. Some swear by it while others feel its redundant, can learn more about it



@2:55

yes for me, wife use this car mainly sending kids and pickup to school from home. I did read the GDI carbon due to no fuel (with additive) shooting the valve face cz directly into combustion chamber, hence u rev up high rpm also wont do the cleaning.

Modern GDI don't have this problem already or no where as severe as the Peugeot / VW GDIs of old. I drive a relatively newer Peugeot, 160k mileage with no walnut blasting done. If you really want to know whether there is severe carbon build-up, get the workshop to open up the valve cover and look at the valves, pistons etc.

This depends, like someone said if he got a lot of start stop or short distance driving the chance of getting carbon built up is high. My mechanic place have seen Mazda Cx5 with over 200k still no issue as the owner always travel on highway high-speed driving, while another customer with 100k over already complain jerking and serious carbon built up, when ask he say he only drive in city and never really drive high speed over 110km/h
The one that pampered the ride is the worse, compare to another 1 which is speed devil got less carbon built up.

Open up the engine top can see already whether walnut blasting is required or not, you can decide after looking at the carbon build-up. Anyway, nowadays its not too expensive do this, below RM1k I think.

If open up for sure they gonna ask you to do it, is either serious or not. Coz you also need to pay for them to open up the intake also, so it is better to wait until like serious jerking or loss of power then do better. Usually recommend is after warranty ends like 100k check 1 time.

What problem you're facing that you need to do walnut blasting so early ?

not obvious issue, saw the car FC kinda getting poorer vs new time, and read on FB group, GDI will getting carbon deposit once hit 60k km above. thats why ask recommendation etc

noted thanks for info

How poor was your FC? For Proton I think 12litre/100km is a norm on city driving, been always like that ever since Campro generation, and I read that Geely 1.5T mostly also same FC figure like this.

I am a great believer of preventive maintenance.

Carbon is a by product of combistion. Therefore it starts to build up any time the engine running, which means the day you got the car from dealer. On GDI engines the carbon buildup is faster than PIE. Mods are done by engine manufactures to delay this process. However no modern engine is free of this carbon buildup. So it good to do decarb anytime to keep your engine running in top shape.

Your situation is a little cautious. Your car is still under warranty. You will void warranty if any 3rd party tempers with the engine. I'd suggest wait till warranty is over. Then you can decarb your engine every 50Kkm to keep it in top shape.

This, price is cheaper compared to other workshop

I did walnut blasting on my X70 at mileage 70k ++ km with one month warranty to go.

If your x70 still have warranty, i think better wait until its period is over only do.

Ya better wait until the warranty is over to do it, no doubt Walnut Blasting will help to clean the carbon buildup and improve the engine efficiency and response. But if anything happens to your engine (which is not related to walnut blasting), once they know it they will void the whole engine and you are on your own. So best to wait a bit.

Hi, anyone know where to get this service at a reasonable price in Penang?

You did it at zordaq bandar seri putra @ bandar puteri bangi ? How much does it cost? How long does it take ?

This post has been edited by GamersFamilia: Oct 20 2025, 03:15 PM

You can google it thru internet, just search walnut blasting for car in penang, good luck

Not Zordaq, i did at Kinrara Auto Dynamic at about RM600 if i can recall correctly. Left my car there about half a day

This post has been edited by Acoen: Oct 21 2025, 07:47 AM

Oh okey, thinking to do it to my x50 when it reach 80 000km

A lot of continental workshop also can do, but not necessary must use walnut blasting to clean the carbon in intake/valves.
My mechanic use chemical to clean the carbon.

X50, got owner did at Rm550

https://www.facebook.com/share/p/1A5yZwCguL/

This post has been edited by Pugbunny: Oct 21 2025, 01:15 PM

Same place as Acoen did for his X70, will take note on this shop, might do it there soon

70k already want to blast..i only did that at 350k km .

What car are you using currently?

Can try Clear Carbon cleaning.

Hydrogen decarbonisation cleaning method.

Price from rm188.

https://www.clearcarbon.com.my/

CX5. now already 400k

Another place to consider


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Wah thank you for the recommendation 🐝

Nice ride you got there, i guess they done the walnut blasting at 70 000km due to tgdi engine, other engine i dont think we need that especially below 100 000km 🐝

before..after 350k..cannot see anything



after blasting

So clean, how much it cost you? Bet feels like new again

My mechanic got few CX5 & CX30 customers most after 5 years or 100k start complaining of rough idling and less power during pick up (mostly due to carbon built up in the intake).
With your picture conditions this is really too serious until cake up so many carbon, not sure either your not sensitive during low speed driving or always on highway drive only?

This post has been edited by littlefire: Oct 22 2025, 09:57 AM

Then don't do it yet.

Carbon build up is due to cars EGR system. It recirculates exhaust gas back into the intake at low load for the engine to run cooler and have cleaner emissions. EGR is not new, even on my old 1989 gallant has EGR but I blocked it with a blocking plate. The PCV system also may channel oil fumes back into the intake and can cause intake fouling. Turbo GDI engines generally will have higher carbon build up as compared to N/A engines.

With no more port injection, the intake valves don't get cleaned hence the carbon build up. Toyota does is correctly with their own D4S engine with both port and direct injection.

So if you drive a lot at light loads then you will get more carbon build up on the intake as the EGR typically functions at lower engine loads.

Only way to check is to remove the intake manifold.

If your carbon built up issue is not severe, sometimes you can just clean it with carb cleaner. A diy job if you are handy.

This post has been edited by jaycee1: Oct 22 2025, 10:14 AM

The main reason is PCV valve system that allows the engine oil fumes to return into intake. If exhaust gas itself the carbon wont stick (see your exhaust), it need oil or contamination to stick with it and solidify.
Thus why it is recommend to fix oil cache tank for direct injection engine to trap those oil from going back into intake, but still it wont total eliminate (only delay).

I guess you've never seen a clogged up egr before.

At low rpm low load, and thus low intake velocity or in the case of GDI, improper burn, the combustion charge will turn to soot and gets re circulated through your EGR. That's what the EGR is supposed to do. Generally, GDI goes to lean burn up to 20:1 so soot is less of a problem but it does happen.

Also all engines will burn a little oil through the rings. Some more, some less.

I already mentioned the secondary cause which is the PCV.

Most EGR issue seen by my mechanic are usually owners driving pattern & poor maintenance, my dads own an e90 320D until today never heard of him said about EGR stuck or blocked due to soot this is because my dad usually drive his ride outstation, on highway a lot and only pump Euro5 B7 diesel.

My mechanic place those who always complain of EGR issue can see a pattern, like to idle long period, usually city dwellers and also poor maintenance (engine oil use cheap and drag long period, (petrol engine) spark plug use low quality or wrong spec., dirty air filter etc or like to pump cheap diesel(for diesel rides)). If your ride seen a lot EGR issue, you need to check back your engine requirements like engine oil spec. spark plug types (or diesel fuel grade for diesel rides) and air filter, usually these 3 if not taken care will not help in improving combustion thus more soot = EGR faster stuck.

This post has been edited by littlefire: Oct 24 2025, 09:57 AM

My point exactly. Which unfortunately covers most city driven cars and drivers. Long idle. Short drives.

EGR on modern GDI cars are to minimize NOx emissions, (GDI tends to run leaner and hotter therefore increase NOx) and the EGR cools the charge. Unfortunately a cooler intake charge tend to also lead to carbon build up.

What doesn't get stuck at the EGR will eventually end up in the intake and valves.

That said, newer cars tend to have more accurate fueling minimizing this issue, but it does happen.

Anything that goes through your intake, be it EGR or PCV will eventually end up fouling your intake ports without something to wash them clean.