Two Faults on my Hymer...

Discussion in 'Tech/Mech General' started by JJ, Jul 21, 2011.

  1. JJ

    JJ Funster

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    Can you believe it?

    On my current trip two faults have appeared on the Hymer :Sad:

    Firstly the engine glow plugs have stopped operating... have had a quick look at fuses and all seem ok...

    Secondly the temp gauge has been showing the engine overheating... but when checking under the bonnet all seems fine, no excess heat or such like and the needle of the gauge flicks about quite a bit in the "hot" zone. I diagnose a faulty gauge/dirty connection. (Of course it has been 30 C outside)

    By a quirk of fate I talked to my Chief Mechanic from Sennybridge last night and was told there was no need to fly him out to Portugal to fix the glow plugs...

    He said probably a loose wire or the like. (I suspect he and Kath had something better to do this weekend rather than a trip over here :Rofl1: :Rofl1:)

    JJ :Cool:
     
  2. Terry

    Terry Funster

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    Pity JJ he could have replenished your stock of FB pies :BigGrin:
    terry
     
  3. Dodgey

    Dodgey Funster

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    JJ, knowing you mechanical prowes, check your engine earth, big black (usually) wire from the engine block to the chassis/battery, even if attached, and looking OK, maybe just remove and clean the contacts, or cheat and loosen slightly and wiggle it vigerously about, don't know but glow plugs heavy (ish) current draw and poor earth could affect the temp guage also, mind you I'd have thought you'd also notice poor cranking, but worth a thought/look?

    Have FUN:thumb:


    We wouldn't want you stuck on holiday now would we:Rofl1::Rofl1:
     
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  4. JJ

    JJ Funster

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    Exactly Terry... and Heinz Tomato soup... :Wink:

    JJ :Cool:
     
  5. champers

    champers Funster Life Member

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    I have booked a flight already :Rofl1::Rofl1::Rofl1:
     
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  6. MercManW123

    MercManW123 Read Only Funster

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    Looked on the Mercedes-Benz Club's technical website for you JJ, and failure of the plugs seems to steer towards replacement; if you've checked other possible problems such as dirty contacts.

    If you do have to replace them, then a number of posters advise:

    i) Giving them a good spray the night before - but if poss using 'PlusGas' instead of WD40 (WD40 often gets berated).

    ii) A number of posts refer to glow plug removal when the engine is HOT - not cold.

    iii) Apparently, they are difficult to remove and have a tendency to snap so you really need to use 'gentle' force.

    You probably knew this info already but if you want me to check anything else out let me know and I can contact one of the online technical guys at the club.

    Regards,

    Bal
     
  7. bigmillie

    bigmillie Read Only Funster

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    Check each glow plug in turn you will find 2 have failed the 616 engine uses current to operate the glow plug indicator thus if one fails you still get the light but if 2 fail no light :Eek!:

    Re the temp gauge mine also jumps about and needs a tap now and again :Smile: only problem modern replacement gauges are smaller than the VDO ones :Sad:
     
  8. Hayleylulu

    Hayleylulu

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    I can nip over with my joey in is RV to have a look as iv a good hammering dose the job:Wink::Wink:
     
  9. bigmillie

    bigmillie Read Only Funster

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    When I changed mine had no problem all 4 unscrewed ok been in engine for 24 years I would advise a cold engine as access is a pain :Eeek:
     
  10. Terry

    Terry Funster

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    Much prefer Campbell condensed-gone to Bachelors now :thumb::BigGrin:
    terry
     
  11. MercManW123

    MercManW123 Read Only Funster

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    I did think that myself to be honest - who wants to be playing around in a hot engine! :Eeek:

    I was just going by what a number of people were advising ALTHOUGH they were referring to cars not MH's (I don't think many classic Merc enthusiasts are into MH's for some reason - probably too down market for them!) so maybe access to the plugs is different.
     
  12. Dodgey

    Dodgey Funster

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    I found the same soak in penitrating fluid a good while before attempting removal for our 6.5 Chevy TD, don't know if it made any difference but I do know they all came out, a mear 16 years in situ, but again lots of scare stories about snapping. The watch word here seems to be go gently.

    Mind you, we're probably talking a new language in JJs mind by now:Rofl1:
     
  13. Wildman

    Wildman Read Only Funster

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    the only common factor between the two problems is an earth connection. I'd be looking for a corroded earth strap someplace.might be easier just to connect a new earth strap.
     
  14. Road Runner

    Road Runner Read Only Funster

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    I have seen you fine tuning the Kipor, maybe a thump here and there might be all you need:Wink::Laughing::Rofl1:

    Happy holidays old timer:Rofl1:
     
  15. JJ

    JJ Funster

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    Thank you for all your helpful tips, suggestions and advice...

    ...after due consideration sipping an ice cold Pepsi I have reached a decision...

    ... I will get one of my people to deal with it in due course... :Wink: :Rofl1:

    JJ :Cool:

    PS better tidy up the guest bedroom then Kath...:thumb:
     
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  16. smudger

    smudger Funster

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    earth strap is ok...its the rest of it that needs changing, its got old and haggard...bit like man,city.......:Rofl1::Rofl1::Rofl1:
     
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  17. aba

    aba

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    hi JJ there is a way of checking the heater plugs in situ but you do need to remove the power cables off each of them.

    if you get a basic test lamp and connect one end to the positive on the battery then touch each heater plug power connection in turn if your light lights then that plug is ok.

    second test is similar but different don't disconnect the power to the heater plugs but connect one end of same test lamp to the power connection on one heater plug put the other end of your test lamp on the negative on your battery then get someone to turn on the ignition if the test lamp works then the heater plug relay is working though this should automatically turn its self off after a short while.

    then you have narrowed the problem to either plugs or the relay.
     
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  18. artona

    artona

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    [​IMG]

    JJ did very well with the genni John, after he read the manual of course. Have you got one for the hymer JJ??:Rofl1::Rofl1: Can you read German:BigGrin:
     
  19. GJH

    GJH Funster Life Member

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    Flamin' 'eck. I bet your bath don't half take some cleaning Simon :Rofl1::Rofl1::Rofl1:
     
  20. Drew

    Drew Funster

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    "But I'm still rollin along":Blush::Blush::Blush:
     
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