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  1. #11
    Join Date
    Oct 2018
    Location
    Falmouth, Cornwall
    Posts
    153

    Default Re: Any Perkins M90 or engine diesel mechs to advise ?

    I'm curious how they've diagnosed a non sealing exhaust valve before stripping or removing the head . In your first post you say you asked them to do a compression test - what was the result of that? A valve not sealing would show as low compression on that cylinder.
    As with Heckler, I'm also curious as to how this would over pressure the header tank?

    Andy

  2. #12
    Join Date
    Jul 2012
    Location
    Maderia, heading back to UK
    Posts
    77

    Default Re: Any Perkins M90 or engine diesel mechs to advise ?

    Finally back on boat , the compression tests were good, the work i had done in the canaries on the injectors was shoddy and was redone in Maderia, the main issue was blocking on the cooling system , heat exchanger etc this was cured by chemical cleaning of sea water circuit ( RYDLYME ) and at the same time a full backflush on the FW circuit, sea trial was yesterday over 1.5 hrs at 2100 rpm boat doing 7.5kts and every temperature was correct no more steam in the exhaust
    well done to Neptune Pirate in Maderia and their perkins mechanic for sorting it all out at a very reasonable cost.

  3. #13
    Join Date
    Jan 2011
    Posts
    5,575

    Default Re: Any Perkins M90 or engine diesel mechs to advise ?

    Quote Originally Posted by Gallant Spirit View Post
    Finally back on boat , the compression tests were good, the work i had done in the canaries on the injectors was shoddy and was redone in Maderia, the main issue was blocking on the cooling system , heat exchanger etc this was cured by chemical cleaning of sea water circuit ( RYDLYME ) and at the same time a full backflush on the FW circuit, sea trial was yesterday over 1.5 hrs at 2100 rpm boat doing 7.5kts and every temperature was correct no more steam in the exhaust
    well done to Neptune Pirate in Maderia and their perkins mechanic for sorting it all out at a very reasonable cost.
    So it was steam then. Almost always is.

  4. #14
    Join Date
    Nov 2001
    Location
    Eastern Med ish
    Posts
    3,264

    Default Re: Any Perkins M90 or engine diesel mechs to advise ?

    Quote Originally Posted by Bobc View Post
    So it was steam then. Almost always is.
    probably condensate, steam is invisible to the eye
    never confuse education with intelligence
    Sailing the Aegean

  5. #15
    Join Date
    Jul 2012
    Location
    Maderia, heading back to UK
    Posts
    77

    Default Re: Any Perkins M90 or engine diesel mechs to advise ?

    yup Steam (saturated lol ), have done a 500m trip with engine as a test to Lisbon no issues at all and my fuel economy is also a lot better

  6. #16
    Join Date
    Jan 2011
    Posts
    5,575

    Default Re: Any Perkins M90 or engine diesel mechs to advise ?

    Quote Originally Posted by rtboss1 View Post
    probably condensate, steam is invisible to the eye
    Pedant alert!

  7. #17
    Join Date
    Nov 2001
    Location
    Eastern Med ish
    Posts
    3,264

    Default Re: Any Perkins M90 or engine diesel mechs to advise ?

    Quote Originally Posted by Bobc View Post
    Pedant alert!
    :-)
    never confuse education with intelligence
    Sailing the Aegean

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