User Tag List

Thanks Thanks:  0
Likes Likes:  0
Results 1 to 5 of 5

Thread: Worn crankshaft keyway.....

  1. #1
    Regular Member
    Join Date
    Jun 2008
    Location
    Lutterworth, Leicestershire
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Eek Worn crankshaft keyway.....

    Hi All,

    My 1.8 SXi has been running like pooh for weeks and weeks now, with poor consumption, rough running esp when 1st started and limp home mode active (no revs above 4k).

    Had the fault code reader on it, and it said Camshaft sensor, so new sensor ordered and fitted - no difference.

    It had already had a new coil pack and crankshaft sensor, so i though I better investigate further....

    OMG!!! the keyway which is machined in the end of the crank and the key which is part of the cam drive sprocket has worn away on each piece until there is around 2 cambelt teeth worth of play of the gear on the shaft!!!!!

    I'm now unsure what to do by way of a repair? The unloaded side of the key and keyway are fine, therefore I have a known, good datum point of where the sprocket should be, so need to somehow lock it in this position.

    I dont know if its possible to machine the damaged keyway in situ with for example, a dremel or similar, then fit a new key, or if I should try tack welding it at the end of the crank?

    Someone even suggested aralditing it on??!!!

    Any ideas gratefully received guys.....

  2. #2
    Regular Member jonnybravo's Avatar
    Join Date
    Jul 2009
    Location
    barnsley,yorkshire,GB
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats

    Vehicle : Signum


    Engine : 20 Dti


    Default

    You don't want to hear this but the only safe way is to change crank and sprocket, oops!

  3. #3
    Full Member Big Sig's Avatar
    Join Date
    Aug 2006
    Location
    Is a very naughty boy
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default



    Weld it on as a temp fix?
    Now I need a turbo to keep up!

  4. #4
    Regular Member
    Join Date
    Jun 2008
    Location
    Lutterworth, Leicestershire
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Smile Hmmmm

    Quote Originally Posted by jonnybravo View Post
    You don't want to hear this but the only safe way is to change crank and sprocket, oops!

    By "safe" what do you mean?? After all, if I attempt a repair which subsequently fails, it will simply scrap the engine, but will not cause an unsafe condition.

    The cost of a new crank, main bearings, timing gear and other sundries + the huge labour cost involved make fitting a new crank unrealistic, so if I DONT effect a repair, I will need to source and fit a new (used) engine.

    With all of that in mind, I HAVE repaired it - and my belief is that the repair will actually prove to be more robust and long lasting than the original fitment of the gear.

    Of course, only time will tell....
    Last edited by abbeytec; 13th May 2010 at 00:01. Reason: Cos I cant bleeding spell!!!!

  5. #5
    Regular Member
    Join Date
    Jun 2008
    Location
    Lutterworth, Leicestershire
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Vehicle InfoStats





    Default Update...

    Well, I've now done around 1200 miles since the repair, and am happy to report its still fine.

    My MPG has NEVER been above 32 since I bought the car 18 months ago, but its now up to 37!!!

    Happy Days!!!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Brand New Or Part Worn??
    By john506 in forum Vectra C / Signum Car Chat
    Replies: 17
    Last Post: 4th October 2011, 20:20
  2. Clutch worn?
    By family guy in forum Engine & Drivetrain
    Replies: 3
    Last Post: 29th September 2010, 21:26
  3. worn clutch
    By decks in forum Vectra C / Signum Car Chat
    Replies: 3
    Last Post: 30th May 2010, 10:22
  4. worn tyres
    By dazy75 in forum Suspension, Wheels & Brakes
    Replies: 12
    Last Post: 12th January 2010, 09:19
  5. Worn Out Suspension
    By cdfjr in forum Handling & Braking
    Replies: 14
    Last Post: 25th April 2009, 07:25

Visitors found this page by searching for:

Nobody landed on this page from a search engine, yet!

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •