Leak from under rad cap



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  1. #1

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    Re: Leak from under rad cap

    Spoke with Ted today. He said he is "scratching his head" trying to figure it out. He tested the rad and all, he doesn't know what the problem is. Says he will take another crack at it tomorrow morning.

  2. #2

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    Re: Leak from under rad cap

    Ted and Kevin took out the thermostat and said the leak was now fixed, I took the bike home. As soon as I hit the 400, bam! coolant all over the place again. Errrr .

    I took it back and Ted says it must be the head gaskets so now he is going to replace those. Man I am getting frustrated and wish I could afford a new bike. I don't even understand how it coul be the headgaskets since the leak is from the rad cap.

  3. #3
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    Re: Leak from under rad cap

    Last edited by SLaP; 04-27-2012 at 04:56 PM.

  4. #4

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    Re: Leak from under rad cap

    So after thinking about this a lot and hearing from Ted, Kevin, Jamie, and, indirectly, Dave (howdee Dave!, heard you were at the shop today) that they are "scratching their heads" and don't know what the problem is "but it must be the head gaskets because we checked everything else" I picked the bike up today because I don't want to pay a lot of cash to start taking the engine apart when we don't know what the problem is, or whether it is even in there. It's going to cost a fair bit to do the head gaskets and, while I don't mind paying that money if it fixes this leak problem, it doesn't seem like we even know that it will.

    I really don't know what to do now. Are there any mechanics that are particularly experienced with this kind of thing or with old Goldwings that someone here could suggest? I have been a customer of Ted's for many years and have never gone to anyone else so input is appreciated.
    Last edited by palmpalm; 04-29-2012 at 01:20 AM.

  5. #5

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    Re: Leak from under rad cap

    Quote Originally Posted by SLaP View Post
    I don't think there are any of those symptoms exactly. The ONLY thing is coolant leaking from the radiator cap itself once the engine heats-up.

  6. #6
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    Re: Leak from under rad cap

    So is it leaking from the housing for the radiator cap, between the radiator cap and the housing that it screws into?

    Make sure the little hose going between the radiator cap housing (just below the radiator cap) and the overflow tank is not clogged. I see that you replaced it - make sure it isn't kinked or pinched.

    Make sure the overflow tank itself has a vent that is not clogged.

    Make sure the radiator cap is the correct one for the vehicle. It's hard to get this wrong, but you never know.

    Make sure the radiator cap housing is not warped and doesn't have a hairline crack (that opens up under pressure). This would be my prime suspect.

  7. #7

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    Re: Leak from under rad cap

    Quote Originally Posted by Brian P View Post
    So is it leaking from the housing for the radiator cap, between the radiator cap and the housing that it screws into?

    Make sure the little hose going between the radiator cap housing (just below the radiator cap) and the overflow tank is not clogged. I see that you replaced it - make sure it isn't kinked or pinched.

    Make sure the overflow tank itself has a vent that is not clogged.

    Make sure the radiator cap is the correct one for the vehicle. It's hard to get this wrong, but you never know.

    Make sure the radiator cap housing is not warped and doesn't have a hairline crack (that opens up under pressure). This would be my prime suspect.
    Thanks for the reply. It seems like the leak is just from in between the cap and the housing, that is, the seal between the cap and the housing is allow the fluid through once the engine heats up.

    How do I check the overflow tank vent?

    It is the correct cap.

    How do I check for a hairline crack in the housing?

  8. #8

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    Re: Leak from under rad cap

    Just took the bike for another ride. I pushed it hard. Kept the gears low, rpms high. I took it on the freeway, I took it in stop and go traffic. Rode for about 45 minutes straight. Engine doesn't seem unusually hot. Sounds good, rad fan is working.

    So far as I can tell, no leak. Could I be this lucky?

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