Type 4 top end rebuild as smoking it’s nuts off when abroad last year

Discussion in 'Mech Tech' started by 1973daisey, Feb 1, 2019.

  1. Had a good morning up the unit today managed to get the engine out and strip it down to the bare block ready for a good clean and re seal and re ring and all so found the issue straight away ..... I’m sure this vale guide on number 4 inlet valve is supposed to be in the head not loose
    [​IMG]
    Should look like this one [​IMG]
    Got it ready for clean up and stuff ready for powder coat next week [​IMG][​IMG][​IMG][​IMG][​IMG][​IMG][​IMG]


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  2. GARRICK CLARK

    GARRICK CLARK Sponsor

    Stateside has extra large outside diameter valve guides. Get the largest O.D guide that he sells and get a machine shop near you to machine down the new guide to a slightly larger size than the guide hole in the head and press it in. The head guide hole needs to be measured after the head has been heated up. This measurement plus 2 -3 thou is the measurement that the O.D of the new guide needs to be. UNLESS the guide hole in the head is out of round/worn due to the old guide rattling around in the head.
    I'd replace all 4 guides and re cut the seats on both heads and fit new exhaust valves while its apart.
     
    Last edited: Feb 9, 2019
    1973daisey likes this.
  3. That could have been a lot worse.....
     
    paradox and 1973daisey like this.
  4. ..had quite same issue on my bus..ended up getting another head and replacing all guides..being on budget couldnt afford to do all the head work but so far so good..but if you find a good type 4s specialist do it proper way


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  5. Iv got a spare head mate


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  6. Been like it for months took me all over Europe lucky boy


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    Popsy likes this.
  7. Iv gotta spare head engine builder sent me years ago


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  8. You are a genius! Think I need to send both my engines to you to check and sort, don’t have much confidence in either of them atm :(
     
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  9. GARRICK CLARK

    GARRICK CLARK Sponsor

    Check the length of the exhaust studs, as they corrode and get shorter, then when its time to refit the heat exchangers there is no thread to put the nuts on.
     
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  10. Just a tryer babe not the best but normally get the job done


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  11. Allready got new stainless ones


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  12. davidoft

    davidoft Sponsor


    With phone a friend:D
     
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  13. Hope I don’t need to now I talked me through it last time


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  14. davidoft

    davidoft Sponsor


    I should offer open university courses , 1-1 :D
     
    Last edited: Feb 10, 2019
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  15. Chuck the stainless ones in the bin.

    They encourage mild steel nuts to corrode (electrolysis) and if you use stainless nuts they can cold weld and either jam on the way on or never come off again.
    Steel is good enough.
     
    nicktuft, 1973daisey and snotty like this.
  16. ^this. Steel studs, brass nuts.

    <edit" studs!> SS has a habit of welding itself on.
     
    Last edited: Feb 11, 2019
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  17. Brass every time.
    Go down to your local exhaust emporium and blag a handful . Cost me a packet of hob nobs about 10 years ago and I'm only half way through em ...


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  18. ...or Kays Fasteners will fulfil your every brassy nut desire...

    Never really understood why VW didn't use them. Standard fitting on old Fords.
     
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  19. Hob nobs well at least you’ve still got ginger nuts


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  20. I gotta pop in to my mates actually and get tyres on new wheels next week I’ll grab em there


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