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2003 GL1800 Antifreeze Leak at Clutch Cover bolt

Posted: Fri Nov 20, 2020 7:57 pm
by johnnyco
Have a 2003 GL1800 that has developed a small antifreeze leak. Thought it may be hoses. Antifreeze was dripping from clutch cover where gasket is. After drying and cleaning a wide area where anrifreeze was showing, cranked bike for couple of minutes. I saw antifreeze seeping from around right bottom bolt head of clutch cover. Is this possible ??? Have put thread sealant on bolt and will test for leak.

Re: 2003 GL1800 Antifreeze Leak at Clutch Cover bolt

Posted: Sat Nov 21, 2020 8:00 am
by GoldWingrGreg
First off, the clutch cover, and rear cover, and any of their bolts have nothing to do with anti-freeze. There are no internal coolant passages at the back of the engine. So there is no reason for "bolt sealer" or a gasket repair. Coolant is not leaking from there, it is making its way there and dripping off from there.

However, there are hoses running too the water pump that sits externally at the back of the engine. It sits between the alternator and the starter. There is also a coolant reservoir that sits behind the engine. If you are seeing coolant dripping off the clutch cover, it is most likely caused by a hose clamp that needs tighten. To access them, it is best to remove the fuel tank. Once the tank is removed 12 of the 40+ hose clamps can be tightened.

Since there are so many hose clamps, and you can have more than 1 leak, I highly recommend pressure testing the cooling system. I'm told a pressure test kit can be "borrowed" from local parts store chains. Be sure to pressure test the rad. cap too, and inspect the reservoir hoses for cracks at their nipples.

If you have a belly pan, it will need removed for testing. On 5th gen Wings, a leak sometimes will pool, eventually spill over, and make its way to the garage floor. Sometimes that can take a few hours. When I pressure test, and since leaks will leak under various pressures, while not at others, I do 2 pressure tests. One is a high pressure test between 16-18psi and the other between 6-8psi. I do both tests for at least 4hrs.

Re: 2003 GL1800 Antifreeze Leak at Clutch Cover bolt

Posted: Sat Nov 21, 2020 11:08 am
by johnnyco
Thank you for reply. Found this morning after removing reservoir tank, drop on bottom water pump. Will take tank off and check hoses. The two I see look ok, so must be one on back side can't see. Thank you for taking time to help me out. Like your icon, we just adopted two cats about three weeks back. Always had dogs, now learning cats are not stable... haha they are fun.

Re: 2003 GL1800 Antifreeze Leak at Clutch Cover bolt

Posted: Sun Nov 22, 2020 10:21 am
by GoldWingrGreg
johnnyco wrote: Sat Nov 21, 2020 11:08 am Thank you for reply. Found this morning after removing reservoir tank, drop on bottom water pump. Will take tank off and check hoses. The two I see look ok, so must be one on back side can't see. Thank you for taking time to help me out. Like your icon, we just adopted two cats about three weeks back. Always had dogs, now learning cats are not stable... haha they are fun.
This is the one I used to use ... I like it far better.

Re: 2003 GL1800 Antifreeze Leak at Clutch Cover bolt

Posted: Sun Nov 22, 2020 5:54 pm
by Viking
GoldWingrGreg wrote: Sun Nov 22, 2020 10:21 am This is the one I used to use ... I like it far better.
As do I. And so (probably) say most of us. :twisted:

Re: 2003 GL1800 Antifreeze Leak at Clutch Cover bolt

Posted: Sun Nov 22, 2020 6:49 pm
by tamathumper
Yeah, I miss that one.

But, I have to say, this one makes me laugh a whole lot every time I see it...



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Re: 2003 GL1800 Antifreeze Leak at Clutch Cover bolt

Posted: Sun Nov 22, 2020 9:09 pm
by johnnyco
Nice icons. After checking all, found it is water pump. Setting up for replacement after Thanksgiving. Hope you all have a great Thanksgiving holiday with your families. Appreciate all replies.

Re: 2003 GL1800 Antifreeze Leak at Clutch Cover bolt

Posted: Mon Nov 23, 2020 9:33 am
by GoldWingrGreg
Glad you found it. A pump can leak 1 of 3 ways. To verify that it is a pump, once the pump is removed, flip it upside down and look for evidence of a coolant trail from the pee hole. The other place they can leak is from 1 of 2 o-rings. If this happens it is almost always caused from an oil leak that seeps into where an o-ring is. Water pump o-rings will swell when oil gets on them. To check if an o-ring, remove the bottom inspection plate, and then separate the pump halves. A swollen o-ring will be so swollen it will not be able to reside in the grove made for it. O-rings are replaceable without having to replace the entire pump.

However, be aware that the large hose clamp at the top of the pump will leak and usually that leak will also cause coolant drops from the clutch cover.

In either case, be sure all 12 hose clamps are tight once the fuel tank is out. Those 12 clamps are as follows. If you follow the 2 top hoses that connect to the top of the w-pump, each one goes to a plastic hose "t". Those 2 t's make for 6 hose clamps. Then there are the 3 clamps at the w-pump, and the last 3 are for the plastic 't' under the water pump. The bottom w-pump hose goes to it.

Re: 2003 GL1800 Antifreeze Leak at Clutch Cover bolt

Posted: Mon Nov 23, 2020 9:51 am
by johnnyco
Thank you for info. Being new to an 1800, and not familiar yet with taking all the stuff off, I am going to have Schroaders do this one.
I had an 85 Aspencade before this one and learned to do most maintenance on it. 5 bolts on each side and they are off on 1200, not with the 1800... I have had this new to me 1800 for just over a year. I have the big Honda maintenance manual so with time I will be more bold. Happy Thanksgiving to you and your family. I love Goldwing Docs. I used their video changing timing belts on the 1200.

Re: 2003 GL1800 Antifreeze Leak at Clutch Cover bolt

Posted: Mon Nov 23, 2020 12:20 pm
by WingAdmin
tamathumper wrote: Sun Nov 22, 2020 6:49 pm Yeah, I miss that one.

But, I have to say, this one makes me laugh a whole lot every time I see it...



   Never miss a video: Subscribe to the GoldwingDocs YouTube channel today!
They make me laugh...



   Never miss a video: Subscribe to the GoldwingDocs YouTube channel today!




   Never miss a video: Subscribe to the GoldwingDocs YouTube channel today!