1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Carbon cleaning

Discussion in 'Car Repairs / Maintenance' started by norseman, 7 Apr 2019.

  1. norseman

    norseman

    Joined:
    2 Oct 2016
    Messages:
    134
    Thanks Received:
    7
    Location:
    Essex UK
    Country:
    United Kingdom
    Been toying with the idea of buying a Rover 75 & in my internet search for a recommended garage for repairs to these now obsolete cars I found one that includes a 'carbon cleaning' procedure. As my engine choice for any '75' would be the BMW diesel can anyone explain what CC does & an unbiased view as to it's effectiveness.
    Thanks in advance for any replies folks.
     
  2. Burnerman

    Burnerman

    Joined:
    7 Feb 2008
    Messages:
    19,494
    Thanks Received:
    3,760
    Location:
    Northumberland
    Country:
    United Kingdom
    Personally I’d not waste my time or money.....there have been snake oil treatments around for years (remember Red Ex decarbonising additive?)
    I’ve tried additives to remove deposits from EGR’s in the forlorn hope that I wouldn’t have to remove or replace them, and when I got the thing out it was as coked up as possible :eek:
    I’ve no experience of Terraclean, but its always in the back of my mind that if you have any money, there’s plenty out there who would like to relieve you of it :mrgreen:
    What I would do is to remove the moveable intake flaps - if your engine has them- before they are ingested and wreck the motor :eek:
    John :)
     
    • Like Like x 1
  3. norseman

    norseman

    Joined:
    2 Oct 2016
    Messages:
    134
    Thanks Received:
    7
    Location:
    Essex UK
    Country:
    United Kingdom
    Thanks for that John, mirrored my own suspicions.
    When you mention intake flaps are you specifically referring to the BMW M47 diesel in the 75 or just generalising?
    nb: our current Mondeo has them (2ltr petrol) but the complete manifold has been renewed in our ownership.
     
  4. Burnerman

    Burnerman

    Joined:
    7 Feb 2008
    Messages:
    19,494
    Thanks Received:
    3,760
    Location:
    Northumberland
    Country:
    United Kingdom
    I think the M47 has these swirl flaps, but not absolutely sure......I have seen the results of one coming off and being eaten though :eek: not a pretty sight!
    If I had a car with a swirled engine, they would have to go.
    Good luck with your search!
    John :)
     
  5. Harry Bloomfield

    Harry Bloomfield

    Joined:
    30 Dec 2018
    Messages:
    1,271
    Thanks Received:
    123
    Country:
    United Kingdom
    No it doesn't have flaps movable or otherwise, the BMW version of the same engine has swirl flaps. It has an EGR and like any car with an EGR, it becomes coked up as a result oil from the turbo being burnt on the EGR and intakes by the hot exhaust gases. That causes poor performance, mpg and worsening emissions. Idea of the EGR is to reduce the Nox figures as it comes out the factory, but as they choke up in use and no one ever cleans them, it is self defeating.

    Best solution for a long term owner, is an EGR bypass and cleaning up the EGR intake manifold. Filthy job, but scraping gets the worst off, a dishwasher the rest.

    Other issues in that area are the intercooler sealing O rings rotting, use viton replacements and the intercooler to EGR flexible pipe becoming porous and leaking oil and boost pressure. Both easy fixes.
     
  6. norseman

    norseman

    Joined:
    2 Oct 2016
    Messages:
    134
    Thanks Received:
    7
    Location:
    Essex UK
    Country:
    United Kingdom
     
  7. Harry Bloomfield

    Harry Bloomfield

    Joined:
    30 Dec 2018
    Messages:
    1,271
    Thanks Received:
    123
    Country:
    United Kingdom
    If you mean the Terraclean, then yes most certainly I do agree with John. It defies logic that it could do what its advertising suggests it can do.
     
    • Like Like x 1
  8. Burnerman

    Burnerman

    Joined:
    7 Feb 2008
    Messages:
    19,494
    Thanks Received:
    3,760
    Location:
    Northumberland
    Country:
    United Kingdom
    In the bad old days when they used to rev the nuts off diesel engines - at least three times - I poured a can of Forte Diesel Treatment into the tank, with minimal fuel.....
    you could actually see the emissions coming down.
    Great on 'marginal' vehicles!
    I'm not sure what the test entails now.
    John :)
     
  9. ericmark

    ericmark

    Joined:
    27 Jan 2008
    Messages:
    13,868
    Thanks Received:
    1,201
    Location:
    Llanfair Caereinion, Nr Welshpool
    Country:
    United Kingdom
    Just come across the instructions for Chatwin Rotary Atomiser which my dad fitted to a Standard 8.
    The idea was to use a leaner mixture which was atomiser with a spinning unit a little like a turbo chargers vanes, think from around 1956 suez canal crisis, when petrol was in short supply.

    I well remember the shot and the long shot, and they did reduce caborator wear, and dripping in neat did help before stripping an engine, it helped remove the build up inside the engine making it softer, however today we don't have lead in petrol, and nearly all cars are fuel injection, so much of the need for upper cylinder lubricant has reduced.
     
  10. Burnerman

    Burnerman

    Joined:
    7 Feb 2008
    Messages:
    19,494
    Thanks Received:
    3,760
    Location:
    Northumberland
    Country:
    United Kingdom
    I vaguely remember the instructions and claims for RedEx.....2000rpm, trickle the solution into the air intake and marvel at the clouds of smoke billowing out of the exhaust :D
    Any carbon removal was a complete illusion - if anything, it was more likely to coke up the top piston ring and make deposits on the inlet valve stems :eek:
    Upper cylinder lubricant wasn’t needed then, any more than now.
    John :)
     
  11. ericmark

    ericmark

    Joined:
    27 Jan 2008
    Messages:
    13,868
    Thanks Received:
    1,201
    Location:
    Llanfair Caereinion, Nr Welshpool
    Country:
    United Kingdom
    Clearly your not a mechanic, it did work, note did, likely does nothing today, however do remember most the oils and petrol we buy today already has additives in it, where in 1956 lead was about only additive.
     
  12. Burnerman

    Burnerman

    Joined:
    7 Feb 2008
    Messages:
    19,494
    Thanks Received:
    3,760
    Location:
    Northumberland
    Country:
    United Kingdom
    Well, whatever you say, Eric.
    As neither of us have evidence regarding the success or otherwise of this product, there’s little point in continuing with this.
     
Loading...

Share This Page