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Thread: When the inlet manifold looks like this, is it time to clean?

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    Vehicle : Vectra

    Trim : Design

    Engine : 1.9CDTi

    Year : 2005

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    Default When the inlet manifold looks like this, is it time to clean?

    Evening all. Took the throttle body off the other day in order to give the boost sensor another clean and was greeted with this.

    Click me

    Is it time to get the manifold off to clean it properly? It's got a bit worse since last time I had a look.

    Cheers.

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    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

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    Be careful with this. You will need to remove the fuel feed pipes from the fuel pump to injectors. It's recommended to replace the manifold gasket too.

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    Ex-Staff Full Member John LE's Avatar
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    Vehicle : Facelift Insignia/Corsa D

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    Unless you know what you're doing don't attempt it.

    It's on my to do list for when the warm weather comes back

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    I will do. Tend to do things with the neighbour, been building engines for a while so knows his stuff. How bad do they normally get though? I'm not sure how much buildup is 'normal' for the 2.2 engine. If this is relatively normal I'll leave it be until I have more time.

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    Regular Member Celes's Avatar
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    Leave it mate. Just give her a good rag every now and then

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    Ex-Staff Full Member John LE's Avatar
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    Mine was like this when it made 155bhp (tuning box fitted) about a year ago. It's just a mixture of exhaust soot and oil

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    Yeah. I doubt mine is making anywhere near 155hp. Yeah thought that was all it was, it just feels very rough. Like if that got into the cylinders it would do some serious damage, work like a grinding paste if you get what I mean.

    Celes; yeah it gets a quick rag every other weekend for a couple of minutes to blow all of the crap out.

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    Ex-Staff Full Member John LE's Avatar
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    Vehicle : Facelift Insignia/Corsa D

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    Have you tried cleaning the EGR valve?

    Also try some millers fuel additive

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    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

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    Quote Originally Posted by cont1204 View Post
    Yeah. I doubt mine is making anywhere near 155hp. Yeah thought that was all it was, it just feels very rough. Like if that got into the cylinders it would do some serious damage, work like a grinding paste if you get what I mean.

    Celes; yeah it gets a quick rag every other weekend for a couple of minutes to blow all of the crap out.
    Our DTi is rough too. No idea why...others I've driven were a lot quieter and smoother. Perhaps it really needs a clean manifold...

    All a diesel needs is the German Autobahn, no traffic, cold temperatures and a lead foot! Did wonders on my 3.0...now just have to take my mum's 2.2 to Germany and test the good old tractor at top speed

  10. #10
    Regular Member Celes's Avatar
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    Quote Originally Posted by john.robertson2 View Post
    Have you tried cleaning the EGR valve?

    Also try some millers fuel additive
    Tried this on our car and no matter how much additive I used the engine sounded the same...

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