What does the oil pump do when the engine is in reverse?
Oil pump/reverse????
- Thread starter bigchevrolet
- Start date
Good question. I know the water pump doesn't pump backwards
They both turn backwards. Both are driven by the crank and the crank is moving backwards.
Yeah, the oil pump actually sucks oil out of the motor and puts it back in the tank when you're in reverse.
I honestly know nothing about the design of a sled's oil pump, but I know that despite the fact that a chainsaw's oil pump uses rotation to power the pump, the direction of the rotation is completely irrelevant because there's actually a tiny piston that gets pushed by a cam. In sleds, there has to be the same irrelevance of direction since the engine actually does run both ways, it just may not be a piston design.
I honestly know nothing about the design of a sled's oil pump, but I know that despite the fact that a chainsaw's oil pump uses rotation to power the pump, the direction of the rotation is completely irrelevant because there's actually a tiny piston that gets pushed by a cam. In sleds, there has to be the same irrelevance of direction since the engine actually does run both ways, it just may not be a piston design.
Oil pump should still work in reverse. When we put reverse kits in our 2002 RMK's the oil pump had to be updated to a 2003 pump as the 2002 pump would not work in reverse. Buddy did not change his and blew a crank bearing due to the pump running backwards and putting an air bubble in the line.
Waterpump could be included in this too....
I backed mine out of the garage once and it overheated in under 3 mins.
Forgot it in reverse when I warmed it up
Forgot it in reverse when I warmed it up
Maybe a little oil in every tank to safely back up haha I've never been into the water pun but I'm assuming a plastic impeller with one direction veins. I guess I've never left mine in reverse for long..
The impellers of centrifugal pumps such as the water pump are designed to be most efficient and effective at producing flow and head when rotated in a certain direction. They will however still pump when rotated in reverse but they may not produce the same head or flow rate as the pump curve will be different. This could explain why true sled overheated quickly when left in reverse.
I have not seen the inside of the oil bump but I would assume it is the same type of pump.
I have not seen the inside of the oil bump but I would assume it is the same type of pump.
R
Rev Kev
Well-known member
The Design of the Oil Pump is a plunger type, Not a rotary type. What this means, the Pump will still pump regardless of engine rotation, as for the water pump, it is a rotary pump, so it is turning backwards, and could lead to overheat if kept in reverse for extended periods of time.
Everywhere I go is sdrawkcab....It was just a thought windering if it was still pumping oil while the engine is running backwards persay one were to accidentally leave in reverse when backing out of garage or something of that nature.
