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Message |
    
robert
Senior Member
Username: robert
Post Number: 172
Registered: 07-2003
| | Posted on Sunday, June 12, 2005 - 04:15 pm: | 
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Read an interesting thread on Smokestak about 'cooking' stuck or rusty engine parts to free off and remove scale etc. Just changed stoves in the basement so decided to give it a shot in the driveway. Not sure what temperature the stove gets to on "clean", but must be 600-800 degrees. Not enough to free off stuck bolts etc. but it does loosen the worst of the scale and burn off anything combustible, such as old diesel someone soaked one of my cylinder heads in. (A necessary step before any of the electrolysis etc. treatments) Do it on a windy day though...click on the photo and you'll see what I call it ;-) |
robert
Senior Member
Username: robert
Post Number: 173
Registered: 07-2003
| | Posted on Sunday, June 12, 2005 - 04:20 pm: |
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NT |
paulgray
Senior Member
Username: paulgray
Post Number: 123
Registered: 05-2003
| | Posted on Monday, June 13, 2005 - 08:53 pm: |
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Robert- Judging from the green paint still there I'd say you were at ~400F. I am the one who does this all the time. I use a kiln and get to 750-800; but I have a programmable controller and a thermocouple. If the oven has a self-cleaning feature, try that. If not, maybe hooking the element directly to the line. Caution is that you should heat slowly. On a 400 lb cylinder, I typically take 12 hours to heat. Usually if you go to 750-800 F on parts like this in 3 hours, you'll be fine. Yes, it does stink up a storm but when it is done, most things clean up easly with a wire wheel or light bead blast. It is really good at prepping blocks for bearings. |
robert
Senior Member
Username: robert
Post Number: 174
Registered: 07-2003
| | Posted on Tuesday, June 14, 2005 - 12:41 pm: |
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Paul, that was a "before" shot! When they came out the paint of course was burned off (not interesting enough to warrant another photo I thought) I did put the oven on the default three hour "Clean" and the door locks and will not open until it has cooled down. Not sure of the temperature though. I'll have to keep my eyes open for a used kiln. That cylinder is junk obviously, but I wanted to see the result before putting in a salvageable one. The nuts on the studs shown did not come free as they would when heated with a torch. Nothing else will get the oils etc. out of the pores of the metal. It's a great idea. |
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