Diesel Engine: How to cleaning the exhaust system?

[coiter]

carbon cleaning ba tawag dun? i actually found in the engine bay a tube sticking out of the exhaust system. i think it's where you can stick a hose and let water through and out the back.

anyway, my questions are, how do i proceed? does my engine have to be cold? start the engine first then insert the hose or vice versa? kelangan bang irev or idle lang? they say kasi it would help sa emission test and lessen black smoke.

thanks!

[boybi]

Just make sure that your car doesn't have a catalytic converter. Water will damage the catconverter.

[XTO]

Provided that it has no catalytic converter, you can proceed. With the engine off, fill it with water and liquid soap (for better cleansing) till it reaches the tailpipe. Remove the hose, close the lid. Start your engine and rev it till all the water comes out (sigurado bumubula pa yan) then repeat it 3-4 times (without the liquid soap) Very ideal before emission test.

[Esnie.com]

yes most old diesel engines have this little tube about 1 or 1 1/2 inch in dia installed in exhaust pipe. mostly found in jeepneys but i also have this in my van, very useful to clean the exhaust pipe. Just fill up until water comes out from the tail pipe, for better result yu can add kerosene it will soften the carbon deposits. Mas maganda kung ibabad mo muna for an hour before starting your engine. Then rev your engine up to 3,000rpm. This is proven effective.

[joemarski]

puede kayang tirahin ko na lang ng "pressure washer" sa tailpipe the rev it up 'til all the water comes out??? then repeat na lang 'til the water clears???

[Esnie.com]

yes, i you have one you can use it but for best result i suggest you installed small pipe after the exhaust manifold.

[nitrox]

Any idea if this "little tube" in the exhaust pipe exists in the Isuzu XUV? I tried to look for it but can't seem to find it. Any XUV owners here who had this done (pasadya)?

[XTO]

Any idea if this "little tube" in the exhaust pipe exists in the Isuzu XUV? I tried to look for it but can't seem to find it. Any XUV owners here who had this done (pasadya)?

Yes it’s just pasadya. it's a 1" iron tube with cap that is welded after the manifold before going down. I don’t have it either and have no plans of having it. IMO it’s a need for those traveling a distance same as diesel PUV in a day to prevent belching.

[coiter]

thanks for the replies! akala ko continuous yung water. di pala hehe. i tried cleaning it before by inserting the hose from the tailpipe. pero parang hindi nalilinis lahat kasi hindi naman umaabot hanggang dulong loob yung hose. pero grabe ang soot na lumabas. nangitim yung sahig ng garahe. hehe

wala ba talagang formal name yung "small pipe after the exhaust manifold"? :D

[joemarski]

Wala rin sa Isuzu Crosswind ko . But my neighbor had one installed (pasadya) in his IC. Sa isang Welding / Vulcanizing Shop niya lang pinagawa. Ang bilis ginawa . It's quite simple: (1) drill a small hole, 3/4" - 1" dia. (2) weld a fitting Threaded "nipple" in the hole (3) an "end cap" is placed on the other end... finish!!! kaya lang... although negligible, the new look is... well... looks cheap . you'd want to have your exhaust tube painted...

[Esnie.com]

Pasadya lang yung G.I pipe na yan, no wondering one of the Filipino ideas ito to reduce the smoke belchers. Anyway theres nothing wrong if you installed one in your manifold it will not affect the engine performance. Big carbon deposits are located in muffler kaya kailangan talaga babaran ng water with detergent to soften it and to flash it out.

[duskylim]

Dear Guys:

While trying to pass an emissions test I paid a carwash to spray water into the exhaust system (as recommended by the emissions testing guys themselves!).

True, nawala ang karamihan ng maitim na usok, at matagal-tagal bago uli nag-buildup yung carbon.

But (and a very big BUT) if you have a piece of flexible pipe in your exhaust system (like my Mazda B2500), you could have the same trouble I had.

If the exhaust system is hot and you spray it with cold water the tendency is to crack the flexible pipe, which I am sorry to say is impossible to repair and expensive to replace.

Kaya mga pare, alamin nyo muna kung meron masisira sa exhaust system nyo bago nyo gawin.

Also, as it seems I am picking nits today, the life of your muffler will be shortened by this process.

Best Regards,

Dusky Lim

[dvldoc]

Here's a suggestion water/alcohol injection eliminates this problem all together. Removes around 95% of all carbon and maintains that throught the life of the motor. If your getting that much carbon in your exhaust imagine whats in your combustion chambers, valves, and clogging your EGR

[Esnie.com]

Dear Guys:

While trying to pass an emissions test I paid a carwash to spray water into the exhaust system (as recommended by the emissions testing guys themselves!).

True, nawala ang karamihan ng maitim na usok, at matagal-tagal bago uli nag-buildup yung carbon.

But (and a very big BUT) if you have a piece of flexible pipe in your exhaust system (like my Mazda B2500), you could have the same trouble I had.

If the exhaust system is hot and you spray it with cold water the tendency is to crack the flexible pipe, which I am sorry to say is impossible to repair and expensive to replace.

Kaya mga pare, alamin nyo muna kung meron masisira sa exhaust system nyo bago nyo gawin.

Also, as it seems I am picking nits today, the life of your muffler will be shortened by this process.

Best Regards,

Dusky Lim

Just a reminder for newbie wants to spray or clean there exhaust system. Make it sure your exhaust pipe are warm preferebly cold. do not spray water or fill water if its super hot to avoid crack problem.

[SaberRider]

When I was doing carbon flushing di tubig and detergents ang ginagamit ko. May mga chemical talaga para diyan. Beltran used to do carbon cleaning pero ngayon wala na, shucks. Ang alam ko the gas stations sa may T.Morato intersection nag carbon flushing. Sa mga new CRDi engines alam ko walang butas para pwede idaan yung liquid solution kaya ang ginagawa nila is that they drill a hole doon sa downpipe.

[Dieseldude]

Smoke is generated by the engine, not the exhaust system. Cleaning the exhaust system with water will not cure the problem of excessive black smoke from a faulty engine or injection pump.

Light soot build up in the exhaust system is normal. The exhaust system cleans itself out through normal driving and occassional hard accelerations.

Heavy soot build up is not normal.

[jundogg]

what's the real deal about this?

pag maitim na ang usok na nilalabas what else could be done?

thanks

[Dieseldude]

what's the real deal about this?

pag maitim na ang usok na nilalabas what else could be done?

thanks

Check your engine's air filter and/or injection pump.

[Arvin Cristi]

what's the real deal about this?

pag maitim na ang usok na nilalabas what else could be done?

thanks

sir pacheck na ninyo yung infection pump, injector nozzles ninyo...

[Arvin Cristi]

what's the real deal about this?

pag maitim na ang usok na nilalabas what else could be done?

thanks

sir pacheck na ninyo yung injection pump, injector nozzles ninyo...