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Jonboy.13

Member Since: 05 Oct 2020
Location: UK
Posts: 2

Inlet manifold and intake port cleaning

Hi all, My 2008 2.4 110 Defender has covered 146k and has oil coating passenger side of engine block. I’ve removed inlet manifold to replace manifold gaskets and confirmed oil on block is coming from inlet thanks to PCV (I’ll also remove intercooler and pipes to clean out)

The intake manifold had a lot of carbon deposits in it which I’ve cleaned out, inlet ports also have a lot of carbon build up that I want to remove before refitting inlet manifold. I’m thinking of using walnut media to blast ports and valve stems but can’t find much info of people doing this on a Puma engine.

Any reason why this isn’t common? Anyone that has done it and can give any tips?

Also, what’s the easiest way to rotate engine by hand so that I can close valves on the port that I’m cleaning?

Thanks for your help

1st Apr 2024 10:29pm

Naks

Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2638

2010 Defender 90 Puma 2.4 SW Alpine White

I got a carbon clean on my 90 after 12 years of ownership, but the mileage was low: only 87,500km.

Details here: https://www.defender2.net/forum/topic82595.html --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged

Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

2nd Apr 2024 10:06am

Jonboy.13

Member Since: 05 Oct 2020
Location: UK
Posts: 2

A little update, I bought the things I needed to walnut blast the inlet and valves myself. Happy with results so far but it’s very time consuming. You really can’t believe how much carbon comes out!
Photos in gallery.

13th Apr 2024 9:18pm

Siwynne

Member Since: 04 Nov 2016
Location: West lancs
Posts: 578

All down to egr valve. Mine was the same. I’ve seen inside one with egr deleted and intake is spotless.
Who would think an egr is a good idea. It’s like

in a pot and drinking it.

13th Apr 2024 10:15pm

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