Technical & Reference Section > Tech and Restoration

Serious stem problem!

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ROX:
Right, Ive blocked up the hole with plasticine, and sprayed a load of penetrating spray down the hole.

I'm going to leave it over the (long) weekend and try the vice/iron bar treatment on Tuesday.

Wish me luck, as if I wreck my frame or forks I will probably cry!  :'(

toys19:
I'll be honest I cant see what the pentrating spray would do for you, its not like its been in there for years and rusted solid, you only just banged it in didn't you?
I would defo just hit it from below with a large hammer using a large bit of metal as a drift, something like a 20mm bar or bigger. All you did was hammer it in so you should be able to hammer it back out again.

I would also consider if the headset lock nut is causing the problem, so loosen that off and see if you can raise it up the stem jsut to be sure its not that which is fouling the shaft of the stem.

ROX:
The headset locknut is completely out.

Trouble with hitting it from below is that it may cause the stem to splay, so making it even tighter and harder to remove.

toys19:
Maybe, but I dont think so, hitting things is a standard engineering method for removing stuff. The stem is 20 ish mm dia with a 3 -4mm wall thickness, thats pretty hefty, they have to be, its not like a crummy bit of frame tube, its a proper thick tube, go on smack it!
You could get a metal bar the same dia as the inside of the stem, then you wouldnt have that problem but you might push the aluminium bit off the top...

QUADROPHENIA:


had the same problem with a set of performer forks with a suntour stem, upside down twat it very very hard with a hammer to get it out, the stem shaft had to be ground down to go in a set of forks in the end as to thick

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