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what did the factory use in the early 70-72 cars for Oil anyone know what brand?
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Re: Oil
lyndon----
What BRAND? I expect that there may have been more than one and we'll probably never know who all the suppliers were. As far as GM is concerned, the oil was of a certain GM part number; that's it.
In PRODUCTION, GM #9985143 was used. This was a bulk-delivered oil which met GM standard 6041-M. Whatever supplier met GM standard 6041-M and got the GM contract for a certain period supplied the GM #9985143 oil.In Appreciation of John Hinckley -
Re: Oil
It arrived in a tanker truck, and was pumped into a tank in the "tank farm"; between the Corvette plant and the adjacent passenger/truck plant, they used about 1800 gallons of engine oil per day.Comment
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Re: Oil
John:
Does this mean the engines were shipped to the assembly plant dry?Comment
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Re: Oil
Yes, Mike they were shipped to the assembly plants dry.
ArtComment
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Re: Oil
Mike-----
One of the things that confuses folks on this point is that many folks know that all PRODUCTION engines (and, SOME SERVICE engines) were run and "hot-tested" prior to shipping from the engine plants. So, folks assume that the engine oil was installed at the engine plants and left in the engines. It wasn't, though. The engines WERE filled with oil at the engine plants prior to hot-test. However, the oil was drained out of the engines prior to shipment. I've never really understood why this was done but, as far as I know, it's still done this way today. Engines are shipped "upright" and, as far as I know, there's really no point at which they would end up in some orientation that might result in spillage from them if the oil were left in them. It may be, though, that the oil used for the hot-test is, for some reason, a different oil than that used thereafter. Generally, "break-in" oils are not necessary with modern engines (those built from the late 60s onward), but there may be some other reason that the hot-test oil is different than "in-service" oil.
Also, I understand that the oil used for the engines at the engine plants and subsequently drained from them was "recycled" back into other engines for the test process.In Appreciation of John HinckleyComment
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Re: Oil
That's interesting Joe. Was the filter changed also? Maybe this was Chevrolet's way of flushing maching debris out of the engine.
At the Blue Oval plant where I worked for many years, all engines, transmissions and rear axles were received full of fluids. We were processed to check and top off as required.
Over the years these assemblies came from this country, France, Germany, Mexico, Japan and Brazil. Didn't matter. They had the fluids in them.Comment
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Re: Oil
Mike-----
The filter and, even, the filter adapter were installed on the engines at St. Louis and, presumably, all vehicle assembly plants. There must have been some sort of "external adapter" used for the hot test at the engine plants. It's possible that this is how the oil was introduced and removed from the engine, too.In Appreciation of John HinckleyComment
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Re: Oil
A bypass adapter was clamped to the machined area on the block (where the assembly plant later installed the bypass valve and oil filter) so hot-test oil went directly from the oil pump outlet to the main oil gallery. Hot-test oil fill was through the hole in the intake where the oil fill tube went later (had a cardboard plug in the hole when it left Flint Engine), and it was drained from the oil pan drain plug; the close fit of the gears in the oil pump to each other and to the housing precluded filling or evacuating through the holes in the oil filter pad. Hot-test oil was filtered and recirculated among the "forest" of hot-test stands; Engineering wanted new, fresh, filtered, uncontaminated oil in the engines, so Chevrolet engines were filled at the assembly plants.Comment
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