Antifreeze leak at a exhaust stud

[Bytown Bandit]

Wondering if anyone ever experienced antifreeze leaking from the front exhaust stud on #1 cylinder?

To my knowledge the studs are original and haven’t been replaced.

[Sagebrush]

It wouldn't surprise me that the leak is in the coolant tubes on top of the block and is weeping down to the exhaust studs or from the head gasket. Clean the block on that side then use baby powder or cornstarch sprinkled around the tubes to help find the link.

[gltriker]

Agreed with sagebrush about the coolant tube orings on that side of the engine. The leaked coolant will spill into a spark plug well.
There is a water drain hole in each spark plug well that descends to the underside of the cylinder head right next to the closest exhaust manifold stud.

20200516_161008_1688391200214_resized.jpg (65.78 KiB) Viewed 746 times

Most times the drain hole is partially obscured from sight by accumulated debris. Poke around with long narrow screwdriver or coat hanger wire.

The water drain hole can be used to push the old flattened exhaust oring/s out of its/their recess, too.

viewtopic.php?t=48676

[puffy75]

I agree with everyone here on this. There is no connection to the stud and the cooling system unless there has been some damage in the past. I can imagine something happening that might have opened a path (crack) to the coolant passages in the head but wow.

[gltriker]

https://www.partzilla.com/catalog/honda ... tat-points

Part numbers 13 and 33

[Bytown Bandit]

Thank you very much for your advice. You were bang on.

This is a new engine and I just replaced all the o-rings and Gaskets on the coolant tubes. Seems the gasket was weeping a little. Will be digging into why later this afternoon.

[Rat]

Very nice looking bike

Gord

[puffy75]

Heard that Rat. Very nice indeed. I am going to have to catch up on some polishing. LOL

[Bytown Bandit]

Well, you were correct. One of the rubber O-rings on the coolant tube was cut.

It has been replaced and the motor is back together and running.

Thank you for all your help and technical support.

[ericheath]

Make your own engine hangars? The triangular ones. Very clean looking ride.

[redglbx]

Very nice looking Wing, good job ! Hope it runs as good as it looks !

I see you also have a BMW 1000XR, I looked hard at those when I bought my FJR back in 2014, what are your impressions of it ?

[NotSoLilCrippseys]

That's a beautiful Wing, Bytown Bandit.

I have found those o-rings to be pain to get in right. They're easy to pinch, twist, or tear on install. Even when they're in right, it seems that they sometimes weep - then they fix themselves (or they don't). I suppose it might be easier to swap in new ones with the single carb, as you might have a bit more clearance than with a stock set up.

I'm curious about the meaning of 35LXII and am thinking it's 3562. But that number isn't something I recognize/understand.

[Shadowjack]

His birthday.

[Sidecar Bob]

Bandit: Do you know the Ottawa Misfits Motorcycle Group? They hold their annual rally rally in conjunction with the Canadian CX/GL500/650 get together on the August long weekend (I'll be there this year, but without a bike)
https://www.cx500forum.com/threads/cana ... 23.117541/

BTW: I used to have trouble getting the water pipe o-rings to go in properly and seal (the one on the pipe that goes into the CX water pump is the hardest) until I learned that if you get the opening absolutely clean & smooth (I use a Scotchbrite pad) and coat the inside the hole with a small dab of silicone grease first (just the inside of the hole, not on the o-ring or the tube) they usually pop right in.

[puffy75]

I have found that if I spray the oring with some silicone spray it goes in nicely and seals well.