Decarbon Engine Service
- Thread starter Oxide™
- Start date
Deleted member 66701
Deleted member 66701
Coke up or just get dirty?
For example this is just dirty:-
It's not "coked" up and will have zero effect on performance (I think the engine had 20k on it at that point).
Only if you live near Norwich.
Coke up or just get dirty?
For example this is just dirty:-
It's not "coked" up and will have zero effect on performance (I think the engine had 20k on it at that point).
Mate I did 100K miles in an RS4, it gets coked, I had Audi clean it twice and it spent 6-8 weeks with Audi in 2007 as they worked on various solutions, none of which worked. I even got to speak with the tech that flew in from Germany to work on it. My car ran 360bhp and 377bhp on the same Rolling Road, the RS4/R8 suffers from the same issue, it's well known and acknowledged, though Audi argues it hits performance.
Caporegime
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Regular seafoam?
this is the answer, and is a different form of carbon issue!
Yup.
Caporegime
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Less company car tax though, if it's coating the inside of your engine it's not coming out the exhaust!
pfft, no idea what you're talking about...
Vauxhall 2.2?
Recently had to strip a 03 suzuki that suffered a slight drop in performance with the whole couldnt rev over 3000rpm thing.
You couldnt pee through the inlet manifold if you wanted too as the holes left were so small, had to leave it for a day soaking in petrol then screwdriver it out, almost halved the weight of the inlet while a colleague spent a day pulling the valves and wire wheeling them back to actual metal.
I was going to give cleaning the EGR valve on my car a go as it looks fairly simple, it's easy to get too. Trouble is, it almost seems pointless as the intake would still be filthy, and that is far from a simple job to do, unless you're confident with a spanner.
vx 2.0 from our zaffy, don't think the butterflies have moved in a while!
Decarbon engines? You haven't needed to de-coke engines since about 1955
Have you seen what happens to the new Minis? There's loads of them on the various forums that look like this after 20k miles
Soldato
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yes the intake would still be filthy but the EGR will be running right
some EGR's that are clogged up can stick open making the engine run bad
http://www.terraclean.net/product.php?id=1 was the kit he used I believe.
Yes, that looks like the one.
Last edited:
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Why? What is wrong with them?
Ok, I'm actually shocked. Engines stopped doing that when they stopped running slack tolerances, poor mixture control and chip fat for oil. Why are they doing this?Have you seen what happens to the new Minis? There's loads of them on the various forums that look like this after 20k miles
Soldato
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Which means fuel isnt desolving the oil vapour deposits off the valves, instead it sits there, the engine turns off and it 'cooks'.
Rinse and repeat over and over.
Its a potential issue due to the transition from port injection to direct injection on petrol engines.
Same issue is present in turbo oil feed systems due to a similar oil carbonisation process.