Wed Jul 31, 2019 4:18 pm by nikkinutshop
Much of that deposit in the oilpan is from the very toxic ethyl lead that was mixed in gasoline to raise the octane. I do not accept the often repeated thing about the ethyl lead cushioning the valve seats. If this was the case, it was a coincidence and likely not by design. Ethyl lead deposits were very hard. I have seen valves held open and burned by a small piece breaking away.
It was truthfully said, in the days of ethyl lead, "There are no old mechanics." The situation changed. Was it education of the mechanics to wearing protection or was it because of ethyl lead being discontinued. I accept a combination of this.
Several factors ended the use of ethyl lead. The main change was due to the introduction of catalytic converters. The other was research into increased number of cancer victims. This was blamed on raised ethyl lead levels in persons.
PS: A side note. Higher octane is not more powerful. Octane additives slow the burn of the fuel to reduce that destructive pinging noise in an engine. A low performance, low compression engine like an Old IHC will perform better on regular. Only a high performance engine will benefit from raised octane. The manufacturer will say when this is required.
My uncle was a mechanic in a small town, real "service" station. He used to tease his sister by saying, "I pump "Ethyl" all day as part of my job." Ethyl used to be a popular girl's name. Uncle Hans died at 55 from smoking and "complications".
If that Miller 141, mentioned by the OP, is a flux-core set up, it is not suitable for welding thin steel or more so steel thinned by corrosion. If that 141 can run wire and a shielding gas, like BlueShield TM 8, a mixture of 75% Argon-25% CO2.
Ask you welding gas supplier for recommendations. I would recommend using a welding wire no thicker than .023". I am not aware of thinner welding wire. Ask.
I would rather have tools I do not need than to need tools I do not have
Thinking risks being controversial and possibly being offensive