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options for 17mm acorn nut removal 1991 560SEL - input requested
Still working on removing the outter 17mm acorn nut from the right of the rear fuel pump (17mm acorn nut on the end of metal fuel line connecting both fuel pumps). After talking with a couple of friends, three suggestions were made:
1. Heat up the 17mm acorn nut using a propane or an oxygen acetylene torch. After the nut expands it should be easy to remove.
2. Use a metal cutting head on a dremel tool to cut off the nut. I'm concerned I might cut too deep damaging the threads. In addition, I would have to purchase another acorn nut from the dealership.
3. Use an electric impact wrench to bust the nut loose.
I did get an epiphany this morning and tried a tire lug wrench which has a 17mm end. Had a friend hold the backing nut using a 17mm open end wrench. Also placed a jack stand under the rear most fuel pump to steady it. Still no joy. Tried a regular lug wrench because I could hold the point of pivot better. Still no joy. SOMEONE HAS USED A HEAVY DUTY IMPACT WRENCH ON THIS NUT BECAUSE IT IS STUCK STUCK STUCK!
So.......of the above three options, which idea might work best?
Last edited by HuskyMan; 01-24-2015 at 11:16 PM.
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01-24-2015, 10:17 PM
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