Blown Head Gasket Symptoms

Discussion in 'Technical Help' started by Fourbears, Jan 18, 2018.

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  1. Fourbears

    Fourbears Well-Known Member

    Dec 8, 2017
    184
    93
    Norfolk
    As the title says - What are the usual blown head gasket symptoms on a 955? As I understand it the easiest one to 'find' is that the engine either won't start or will idle really roughly. Probably in conjunction with 'mayonnaise' under the oil filler cap and oil in the coolant. Are there any others? I am interested in a 955 that 'overheats' but the seller can't or won't be any more specific other than it takes about 2-3 miles to start overheating. My thoughts initially that it is probably the thermostat stuck shut and maybe the water pump is not working so well. I am ok with pulling things apart and putting them back together so I can do most things so am tempted to buy it and put it back to working order!
     
  2. GaryM

    GaryM It's him, you know who. Him from you know ....

    Apr 28, 2016
    978
    500
    Patna , Ayrshire
    Would have to be very cheap if you buy it. Those are the usual symptoms can’t think of any more.
    With the owner being so inspecific as to what it’s symptoms are I would say walk away from it
     
  3. TEZ 217

    TEZ 217 Crème de la Crème

    Mar 6, 2016
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    "Overheats"
    Yes that's another head gasket symptom, but nowt written in stone could be thermostat as you said, again as mentioned oil in the water or vice versa.
    Owner is unspecific or does he actually know, you'll have to guage that face to face
     
  4. Dozers Dad

    Dozers Dad Bushmills Chief Quality Controller
    Subscriber

    As the other guys have said. The symptoms are wide & varied fourbears.

    Lots of mayonnaise type stuff in the oil. Plus the oil level being much higher than normal is a dead giveaway. Also a lot of steam from the silencers. That doesn't stop once the bike/exhaust is fully warm.

    I had one recently that turned out to be the internal seals on the water pump & a knackered radiator cap. It had most of the signs of a goosed headgasket but it ran/idled fine.

    If it's not too far away from you? Go & have a look mate.
     
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  5. Fourbears

    Fourbears Well-Known Member

    Dec 8, 2017
    184
    93
    Norfolk
    Yes well I have a MG TF with the K series engine. They all overheat or so folklore would have it. A lot of the time it is just the coolant tank cap that is knackered! The bike is fairly cheap but I will see if I can elicit some more info.
     
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  6. TEZ 217

    TEZ 217 Crème de la Crème

    Mar 6, 2016
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    Seems you know the way ahead, Aim for very cheap instead of fairly :D
     
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  7. Dozers Dad

    Dozers Dad Bushmills Chief Quality Controller
    Subscriber

    I had a 1999 MGF.
    The headgasket replacement is no more difficult than on any other car.
    "IF" it weren't for the tiny working area! :eek:

    Fortunately mine was done before I purchased the car. Changing the waterpump/cambelt was like trying to wallpaper your hallway through your letterbox though! o_O
     
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  8. Fourbears

    Fourbears Well-Known Member

    Dec 8, 2017
    184
    93
    Norfolk
    Yes I know what you mean! Plus when short in stature you have to stand on a box just to even reach the head!
     
  9. TEZ 217

    TEZ 217 Crème de la Crème

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    Excuse me, one minute gaskets then !!!!
     
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  10. Erling

    Erling Well-Known Member

    Dec 12, 2017
    52
    63
    Norway
    In addition to what's already mentioned: A garage should have equipment for measuring for HC gases (hydrocarbon) in the coolant tank. Also, pull the plugs and look for one or more steam cleaned plugs.
     
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  11. t552

    t552 Senior Member

    Nov 17, 2014
    280
    113
    Bristol UK
    If by overheating do you mean the gauge is reading high or coolant level raising and overflowing? If it' the latter try new rad cap. If it' reading high I would try the sender. Rare that head gaskets go so go for a cheap and poss easy fix.
    Faulty rad cap is very common and very cheap. Buy genuine not pattern too.
     
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  12. Fourbears

    Fourbears Well-Known Member

    Dec 8, 2017
    184
    93
    Norfolk
    As for 'cheap' is less than £500 for a 955i Sprint really cheap?
     
  13. Dozers Dad

    Dozers Dad Bushmills Chief Quality Controller
    Subscriber

    Hell Yes!
    Depending on the cosmetic condition of course?
     
  14. Fourbears

    Fourbears Well-Known Member

    Dec 8, 2017
    184
    93
    Norfolk
    I am really tempted to buy it even without seeing it. Even with a 340 mile round trip!
     
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  15. Dozers Dad

    Dozers Dad Bushmills Chief Quality Controller
    Subscriber

    I'd look at it like this mate....
    At under £500. If it's cosmetically good but the engine needs work? You could break it & get approx 3 times your outlay.
    If the engine is fixable without too much effort/cost? You've got yourself a bargain bike.
    Obviously breaking it will req work & patience whilst the bits sell. However you will make enough to hopefully make it all worthwhile?

    IMHO it's a no brainer.

    PS.... If you decide not to buy it? Would you be kind enough to PM me with the details please?
     
  16. TEZ 217

    TEZ 217 Crème de la Crème

    Mar 6, 2016
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    THE FORUM'S SERIAL LOOKER. ANYONE MENTION A CHEAP BIKE, :p
    [​IMG]
     
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  17. Dozers Dad

    Dozers Dad Bushmills Chief Quality Controller
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    Only if fourbears isn't going to buy it himself? :p
    Looking at the distance he's saying it is from him. I'm guessing Scotland or Cornwall? In which case I probably wouldn't be interested?
     
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  18. dilligaf

    dilligaf GrrrR3Rrrr
    Subscriber

    Mar 30, 2017
    7,216
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    Murderer :mad:
     
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  19. TEZ 217

    TEZ 217 Crème de la Crème

    Mar 6, 2016
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    He's saying 340 mile round trip = 170 each way approx
    Doesn't get you to Scotland !!! maybe North East again !!!!
    Feckin no doubt right on your doorstep :p Good luck Jez :heart:
     
  20. Dozers Dad

    Dozers Dad Bushmills Chief Quality Controller
    Subscriber

    Ah!
    I misread it Tez. I thought it was 340 miles each way?
    It could indeed be closer to me? :grinning:
     
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