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Senior Member
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717 Posts
Discussion Starter #1
I love my 1995 Bianchi Eros I've had since new.

The other day the bolt that holds my seat on the seat post broke. In order to remove the seat post (couldn't match up the bolt) I had to use a propane torch to heat the Aluminum seat post and then dump water on it and let the different contraction rates seperate the two metals. I did this 5 or 6 times before the seat post broke free, the paint is burned and it looks simply awful.

Now I'm worried that I have weakened the welds in the seat post area, think the old girl is still safe to hammer on or should she be given the retirement she has earned?

Thanks
Bob
 

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Senior Member
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717 Posts
Discussion Starter #3
Not glowing red but hot enough to burnoff the paint. I used a white canister propane torch. Tried to keep it mosty on the seat post but went down about two inches of the tube. Had the shop guys here at the plant look at it and they said just by the heat/cool cycles I weakened the welds BUT they really don't know anything about the stresses I generate by bicycling so couldn't really say if I need to worry about it.

Was wondering if anyone else had to do this and what the result was.

Thanks
Bob
 

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Total noob (& forum admin)
Joined
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12,350 Posts
My guess would be that the quenching would possibly create hard and brittle welds. But that junction doesn't see the stresses of the BB or head tube. If you're a little guy, it should be ok. Off the top of my head, I don't recall ever seeing a road frame fail there.

Unless it breaks, then I would like to retract the above quote, and replace it with "I told you so".
 

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Senior Member
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717 Posts
Discussion Starter #5
gotcha, thanks for your thoughts

As much as I love my bike I "may" use this for an excuse to upgrade
 
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