I read somewhere that you can change to a Fumoto valve when your oil pan is full by applying suction to the oil filler tube and then remove the normal drain plug and replace it with the Fumoto valve.I have a new fumoto valve and need to change my oil and would like to do it the easy way and drain the old oil into jugs I already have.Is this really true. Hate to try it and get oil everywhere.Thanks for your commentsBusyguy

That was posted by Fuzzyface with the link to it below. (First post on page 2)PostFor the first oil change on my ISL, I was concerned about capturing the 7 gal or so of oil draining out of the engine (I had the Fumoto valve, but had not yet installed it). In a stroke of genius, I hooked up my shop vac to the oil filler opening, and had my wife hold it there, while I pulled out the old oil plug and installed the Fumoto valve.....Not a single drop of oil was spilled....worked like a charm (I could actually hear air bubbling up thru the drain plug opening before I screwed in the Fumoto valve).

Vacuum is a tremendously powerful force. I'm glad it worked for FF but I would be concerned it could damage a gasket or seal someplace. I would wait until an oil change to install it.

I would wonder if the fumes from the crankcase, when compressed and drawn across a sparking motor, might be hazardous. Like "boom."

Moved from Forum Technical Support

Go ahead, let us know how it turns out.

Fumoto valve install | Good Sam Community

oldmattb
Explorer
Apr 19, 2017
I would wonder if the fumes from the crankcase, when compressed and drawn across a sparking motor, might be hazardous. Like "boom."
ScottG
Nomad
Apr 19, 2017
Vacuum is a tremendously powerful force. I'm glad it worked for FF but I would be concerned it could damage a gasket or seal someplace.
I would wait until an oil change to install it.
Tiger02
Explorer
Apr 19, 2017
That was posted by Fuzzyface with the link to it below. (First post on page 2)

Post

For the first oil change on my ISL, I was concerned about capturing the 7 gal or so of oil draining out of the engine (I had the Fumoto valve, but had not yet installed it). In a stroke of genius, I hooked up my shop vac to the oil filler opening, and had my wife hold it there, while I pulled out the old oil plug and installed the Fumoto valve.....Not a single drop of oil was spilled....worked like a charm (I could actually hear air bubbling up thru the drain plug opening before I screwed in the Fumoto valve).

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