Leak coming down metal chimney // crack in stove

[ws1511]

Hey,

Have two stove/chimney related questions, all help appreciated!

1— Recently relocated to a cabin and we're heating pretty much exclusively with wood. Noticed a leak around the chimney—upstairs, the source was water adhering to the metal chimney. I went up on the roof and it appears there is a slight gap between the chimney and storm collar, and that's where water is coming through. Wondering the best way to fix this — whether some kind of high heat caulk will do it, or putting a second storm collar on top, or something else?

2— The stove itself works well enough but has a decent sized crack in the back. It is an older Jotul 602 model. Intending to fix it with furnace cement, I assume this is the way to go? Have not done this sort of repair before, so thought I would check!

 

[bholler]

Hey,

Have two stove/chimney related questions, all help appreciated!

1— Recently relocated to a cabin and we're heating pretty much exclusively with wood. Noticed a leak around the chimney—upstairs, the source was water adhering to the metal chimney. I went up on the roof and it appears there is a slight gap between the chimney and storm collar, and that's where water is coming through. Wondering the best way to fix this — whether some kind of high heat caulk will do it, or putting a second storm collar on top, or something else?

2— The stove itself works well enough but has a decent sized crack in the back. It is an older Jotul 602 model. Intending to fix it with furnace cement, I assume this is the way to go? Have not done this sort of repair before, so thought I would check!

View attachment 284936View attachment 284937

Yes you need to caulk the storm collar to stop that leak and you need a cap.

If the stove body is cracked it is not safe to use and furnace cement won't fix that. The stove needs replaced

 

[stoveliker]

While you're caulking, I'd also caulk the vertical seam on the pipe. Mine (on an oil furnace) leaked in through the vertical seam.

Be careful on that roof though; don't know where the vertical seam is.

 

[begreen]

A good quality silicone caulk around the storm collar should make a big difference.

 

[ws1511]

Thanks for input. I'll try some kind of high-heat silicone caulk around the storm collar.

As to the stove, I was not thinking this was severe enough to qualify for a replacement. I've attached some photos of the crack in the back. It's fairly thin and I think could be sealed up easy enough, but maybe I am mistaken?

 

[begreen]

A good silicone like GE Silicone II is rated at 400º. That is sufficient. The adhesive bond to the metal is also important.

 

[john26]

I would not run the stove like that but I think it could possibly be fixed. I am guessing the stove is enamel coated? If you can find someone to weld it the enamel would have to be ground off and a hole drilled at the end of the crack. Another option would be to bolt a steel plate over the crack with a a hi temp gasket between it and the stove once again I would drill a hole at the end of the crack.

 

[begreen]

I would not run the stove like that but I think it could possibly be fixed. I am guessing the stove is enamel coated? If you can find someone to weld it the enamel would have to be ground off and a hole drilled at the end of the crack. Another option would be to bolt a steel plate over the crack with a a hi temp gasket between it and the stove once again I would drill a hole at the end of the crack.

This is a common place for the 602 to crack if it is overfired or if the baffle warps and allows a gap at the rear. I had it happen to our F602 when folk were caretaking our house. This was with a brand new back. The crack was hairline and not as severe as what is showing. That back shows repeated overfirings. I'd replace the back in this case with a new one. The stove is pretty easy to rebuild.
To protect our stove I bolted in a rear burn plate made of 3/16" steel. That has worked well to protect the back of the stove. I posted a thread on this long ago. Will see if I can dig it up.

Here is the thread:

New to me Jotul 602

I went to get my free Jotul 602 from a friend of a friend and it was beat. The owner said the stove had a crack on the front of the stove but they still uesd it and it was fine. When I saw the crack it was huge 1/4 of an inch wide by 4 inches long. I don't know how they used it. Plus the back...

www.hearth.com

 

[ws1511]

Thank you all for the input, much appreciated!