[TR] Oil Pressure Loss

Tony Drews tony at tonydrews.com
Mon Dec 26 19:25:37 MST 2016

The pickup is still submerged with 4 quarts in the sump / in circulation.


At 02:44 PM 12/26/2016, david brady wrote:
>Wow, this group is certainly experienced with dumping oil out of live
>engines! I understand it was common practice to do hot engine oil
>changes on irrigation engines. It was to cumbersome to take the engine's
>completely out of service which would require re-priming to get the
>pumps running again; instead, they brought the engines to a slow idle,
>opened a ball valve to drain the sump, spun on a new filter, and
>refilled the sump, then the engine was cranked up to full load.
>I had my self pretty much convinced that even though I dumped three
>quarts out the gauge orifice I never starved the bearings of oil flow.
>Now I'm not so sure. I have an aluminum sump which holds 7 quarts. I
>pumped out three, so now the question is, how deep does the oil pump
>suction inlet go into the sump pan? IOWs, did the oil geyser stop
>because I shut down the engine or did it stop because the oil pump
>started sucking air after pumping three quarts?
>'68 TR250,
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