Is there such thing as an external oil pump?

[Eli]

I'm looking for a pump that will enable me to circulate and therefor filter and cool the oil in my Honda GXH50.

I suppose it could be any pump that can handle hot oil.. Also needs to operate off 12v. Don't know how much pressure is required to pump oil through a normal oil filter.

Thanks for any help.. I'm continuing my search. lol..

 

[Eli]

guess not.

 

[Eli]

bump for the day

Sure, the moment I post YACT, all the guru's seem to retreat back into the woodwork.

 

[Eli]

/me jumps around, frantically waving his arms.. In here! Come in here!

 

[RegaPlanet]

for honda's no idea but there are plenty of dry sump setups for domestics... Pretty much any high performance racing engine uses them. So yes there are external oil pumps aka dry sump setups.

 

[Eli]

Originally posted by: RegaPlanet
for honda's no idea but there are plenty of dry sump setups for domestics... Pretty much any high performance racing engine uses them. So yes there are external oil pumps aka dry sump setups.

LIFE! LIFE IN MY THREAD!

Hmm... Dry sump setups.. interesting.

You obviously didn't click on my link, though. I'd imagine that a full pressure external oil pump for a car engine would be rather large, and power robbing.. lol.

This is for a small engine. A 2.5HP, SOHC, 50cc engine, to be exact. In these small engines, the oil is unfiltered.. meaning you have to change it at every 25hrs, even though the oil is fine.. to get the baddies out. Also, 40% or more of an air-cooled engine's heat is dissipated through the oil, If I could cool it.. it would extend engine life even more.

Basically I need a small external pump that's capable of pumping hot oil through an oil filter. It doesen't necessarily have to be for the automotive industry..

It can either be electric (12v), or mechanically driven with a belt.

 

[RegaPlanet]

oh... no I didn't click on your link

I'm kinda curious too about a setup for such a small engine now also. There must be an adapter for the oil filter to have external cooling at least. All you need is an external rad IMO. A dry sump system wouldn't help any for such a small output engine.

 

[RegaPlanet]

Looked around anyway for a dry sump system and didn't see anything that could run off electrical power, only crank and cam driven pulley systems. I was thinking.... even if you went with a dry sump system yer oil is gonna get dirty just as fast anyway. Only real advantages of a dry sump system is you can use as much oil as you like and can put the oil reservoir lower in the vehicle for a lower centre of gravity... thats and maybe some small windage issues with the crank... you dont have to deal with any of this anyway so what's the point.

EDIT: was rereading yer posts and noticed you said the oil is unfiltered. Are there even any external ports to allow the oil to be circulated externally? If so you could simply run an external line with an in-line oil filter. One with a window if available would be good also so you dont have any oil pressure problems from built up gunk after awhile.

 

[Eli]

Originally posted by: RegaPlanet
oh... no I didn't click on your link

I'm kinda curious too about a setup for such a small engine now also. There must be an adapter for the oil filter to have external cooling at least. All you need is an external rad IMO. A dry sump system wouldn't help any for such a small output engine.

That's just it. There is no oil filter. There is an oil drain plug, and an oil filler plug, that's it. lol.

These small engines operate off splash lubrication. That is, a small extension on the connecting rod called the dipper dips down into the oil every revolution. This sloshes oil all around inside, lubricating all engine parts. That also means that a dry sump setup would be impossible, since the oil level in the crankcase must remain constant.

My idea would be to suck oil from the drain hole, pass it through a filter, perhaps a small oil cooler, and then spit it back into the engine through the fill hole.. The level in the crankcase would remain constant, but I would get the added benefits of oil filtration and cooling.

 

[ScrapSilicon]

Originally posted by: Eli

Originally posted by: RegaPlanet
oh... no I didn't click on your link

I'm kinda curious too about a setup for such a small engine now also. There must be an adapter for the oil filter to have external cooling at least. All you need is an external rad IMO. A dry sump system wouldn't help any for such a small output engine.

That's just it. There is no oil filter. There is an oil drain plug, and an oil filler plug, that's it. lol.

These small engines operate off splash lubrication. That is, a small extension on the connecting rod called the dipper dips down into the oil every revolution. This sloshes oil all around inside, lubricating all engine parts. That also means that a dry sump setup would be impossible, since the oil level in the crankcase must remain constant.

My idea would be to suck oil from the drain hole, pass it through a filter, perhaps a small oil cooler, and then spit it back into the engine through the fill hole.. The level in the crankcase would remain constant, but I would get the added benefits of oil filtration and cooling.

no...if you want to run external you will need to pressurize the system and in your instance the crank has no oil feed so its splash only..you are talking about having to re-engineer the whole assembly to gain that small benefit..scale of economy comes into play ...enjoy the project..or change the oil regularly like you have been doing looked at your jpg as original size and see you have a welder and other goodies..is the block cast iron or aluminum...Honda ATV(400EX) has external cooling lines/filter(pump?) and a fat reservoir(external) might could you use for ideas

 

[Zenmervolt]

Don't worry about it on a small engine with splash lube. We've got an old Briggs & Stratton single cylinder engine from the 1970's that still runs fine and we beat the crap out of it (it's a 16 hp engine in our Simplicity garden tractor). As long as you change the oil on a regular basis you don't need to worry terribly about filtration.

ZV

 

[Eli]

Originally posted by: ScrapSilicon

Originally posted by: Eli

Originally posted by: RegaPlanet
oh... no I didn't click on your link

I'm kinda curious too about a setup for such a small engine now also. There must be an adapter for the oil filter to have external cooling at least. All you need is an external rad IMO. A dry sump system wouldn't help any for such a small output engine.

That's just it. There is no oil filter. There is an oil drain plug, and an oil filler plug, that's it. lol.

These small engines operate off splash lubrication. That is, a small extension on the connecting rod called the dipper dips down into the oil every revolution. This sloshes oil all around inside, lubricating all engine parts. That also means that a dry sump setup would be impossible, since the oil level in the crankcase must remain constant.

My idea would be to suck oil from the drain hole, pass it through a filter, perhaps a small oil cooler, and then spit it back into the engine through the fill hole.. The level in the crankcase would remain constant, but I would get the added benefits of oil filtration and cooling.

no...if you want to run external you will need to pressurize the system and in your instance the crank has no oil feed so its splash only..you are talking about having to re-engineer the whole assembly to gain that small benefit..scale of economy comes into play ...enjoy the project..or change the oil regularly like you have been doing looked at your jpg as original size and see you have a welder and other goodies..is the block cast iron or aluminum...Honda ATV(400EX) has external cooling lines/filter(pump?) and a fat reservoir(external) might could you use for ideas

Hmm.... Why would I need to pressurize the whole system? ... What would be wrong with sucking oil from the bottom of the crankcase, passing it through whatever, and then letting it re-enter through the oil filler hole? It wouldn't take like 40PSI or anything to circulate oil through a filter and small oil cooler, would it? It would be a low pressure system.. It wouldn't need to lubricate the engine with the pressure, the engine would already be doing that with splash. The pressure would just be to force the oil through the filter. Even if it took like 20 minutes to circulate all the oil (1/4 a quart, lol) once, it would be worth it. It wouldn't be pressurizing the crankcase, because it would be spitting out just as much oil as it was taking in.

Shrug. I don't see any reason why it wouldn't work, I just need to find a suitable pump.

 

[Eli]

Originally posted by: Zenmervolt
Don't worry about it on a small engine with splash lube. We've got an old Briggs & Stratton single cylinder engine from the 1970's that still runs fine and we beat the crap out of it (it's a 16 hp engine in our Simplicity garden tractor). As long as you change the oil on a regular basis you don't need to worry terribly about filtration.

ZV

I know... but still.. I don't want to have to change the oil every 20-25 hours.. There's nothing wrong with the oil, but you have to do it to get the bad stuff out.

I just want to be fancy.