Intake manifold carbon cleaning

Need some advise of a general nature not covered in the forums below? Here's where to do it.
Country: South Africa
Vehicle: Pajero 3.2 DiD SWB
Posts: 7
Joined: Sun Nov 12, 2017 11:07 am

Intake manifold carbon cleaning

Thu Aug 22, 2019 4:19 pm

Hi guys,

Seems like I have to have my intake manifold carbon cleaned, possibly an EGR blank done after that. Rough idling and excess smoke when engine warms up. Strange though, it doesn't happen with every drive.

Can anyone recommend a mechanic or somewhere where I can attend to this in Cape Town? I've seen some guys offering a "non-invasive" clean, but I'm sceptical. Does anyone have experience wth this? Also seems like it would be a massive job to remove the manifold and get it cleaned...?

Any advice appreciated.


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Country: South Africa
Vehicle: Pajero 3.2 DID SWB
Posts: 36
Joined: Sat Aug 25, 2012 6:34 pm

Re: Intake manifold carbon cleaning

Mon Nov 18, 2019 6:58 am

Good day

It is not too difficult to do this job. Just takes time.
I did mine a few months ago. used pressure washer and oven cleaner.
Looks like new now.
For EGR blank use a piece of stainless steel plate and put it on inlet manifold side.
5 min job for fitting.

Country: South Africa
Vehicle: 03 Mitsubishi Pajero 3.2 DID
Posts: 3
Joined: Mon Oct 29, 2012 1:04 pm

Re: Intake manifold carbon cleaning

Sun Nov 24, 2019 11:31 am


I am planning to do my Gen 4 soon as well. I service my car with Jacques Norval and when I was there a few weeks back he had just completed an intake manifold and intercooler clean on a clients 2.5 triton. Give him a shout.

Country: South Africa
Vehicle: 2004 Pajero 3.2did SWB A/T
Posts: 1
Joined: Sat Nov 17, 2018 10:53 am

Re: Intake manifold carbon cleaning

Mon Nov 25, 2019 7:13 am

Hi Martyn, could you please give me a guide on how you blanked off the EGR?
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Country: South Africa
Vehicle: Pajero Sport 3.2 DI-D GLS 2011
Location: Randburg
Posts: 88
Joined: Sat Jul 06, 2019 1:58 pm

Re: Intake manifold carbon cleaning

Tue Jan 14, 2020 1:29 pm

Interesting subject ---the carbon cleaning of the inlet manifold.
Where are the carbon deposits originating ? Diesel 500 ppm , 50 ppm or even 10 ppm ?
Why does the turbo not suffer the same carbon problem on both ends (exhaust side and boost side) ???
Sorry, I am not a specialist but it does not make sense to me , So please put me on the right path....

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