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Something that works for me is to heat them up, via a torch, then quench with penetrating oil. Seems to suck the stuff down into the threads that way. Repeat as necessary. You have to be careful or you'll have a nice fire to put out and watch the surrounding material. I use needle-nose vicegrips to grab onto headless or slotless ones where I can get them in. Sometimes drilling is the only way, though. I've found that a variable speed flex shaft with a small drill works pretty well for that. Just make sure that the top is flat and center-punched before starting in. I work up to the tapping size in small steps, sometimes the heat of drilling or the loss of material will get it loose enough that I don't have to retap. On Wed, 27 Jan 1999 15:07:34 -0000, you wrote: >Whilst disassembling my 1970cc Vanagon motor, I have found several corroded >screws of the type that hold the cooling tin onto the case. They are so bad >that even the x pattern on top disintegrated when I tried to unscrew them. I >foresaw this happening and used the usual loosening fluids in advance of >attempting it but to no avail. I have about 5 that are like this, due to the >engine, out of an ex builders transporter, having tons of what I can only >describe as crap, leaves, sand, sawdust, oil etc on top of it. > >Any tips on how to remover these? I don't fancy the thought of having to >drill them out, expense etc. > >Thanks > >Damian > >-´ø r---------------------------------------------------------- >Unsubscribe? mailto:type3-request@vwtype3.org, Subject: unsubscribe