Motor swap on a Schwing bpa 500
Pool man Travis 02-02-2017 comment profile send pm notify

I have an early 2000s bpa 500 with a spun crank Bearing. The engine shop quoted 10k to rebuild the turbo 4cylinder German Duetz motor. 

Another shop that specializes doing custom vehical builds said they can put a v8 gas motor in place for less then half the price. They tell me this new motor will be more powerful and able to run a good size air compressor as well. Does anybody see an issue in doing this swap other then the increase in fuel consumption.


Pool man Travis 02-03-2017 reply profile send pm notify

I am getting this pump ready for the new gas v8 next week and would really like someone's experienced opinion on this if possible.  Hate to waste money on a whim to save some.

Doug 02-03-2017 reply profile send pm notify

Watch the rpm so you don't over speed the hydraulic pump. You need to know what the Deutz was set at and limit that gas motor to the same.

pumpnfinish 02-03-2017 reply profile send pm notify

I would like to see how this works. I would just be worried about the reliability of that engine in that environment.  What v8 are you thinking about?

pumpnfinish 02-03-2017 reply profile send pm notify

I would also do some more looking, Im sure you can find cheaper deisel replacement engines than what you were told for a rebuild. That price seems really high to me. Would be a lot less headache in my opinon. 

b-alto 02-03-2017 reply profile send pm notify

I've owned a Case skid steer gas (1830) and now a diesel (1845c) the difference isn't even comparable. Diesels run much lower RPM with twice the power. Also cooler. I know one thing for sure, if you ever buy a skid steer never buy a Gas.,

ShortStik 02-03-2017 reply profile send pm notify

i would be concerned with over rpm the pumps and torque(not power) with gas.

10-4 b-alto



orygun 02-03-2017 reply profile send pm notify

your custom shop is not doing you any favors. the new motor with core at hamilton in portland is 10K

1-503-288-6714 gas motors take different hydraulic pumps and your unit will be devalued

you need a book and cam and crank centering pins. once you get into that motor there will be other items to replace, maybe a oil pump that was the cause of one go down.

seen two rebuild blow up from the owner being in a hurry. use a really good mechanic to help you and you could have it going on a couple grand of parts. .


DIGGER 02-04-2017 reply profile send pm notify

Fuel economy will go to pot. oil pumps don't like reving over 2,600 RPM. At that speed the V8 gas engine would be gutless. Contact Brian at Grout and Concrete, Pomona, CA. They always have a few Deutz removed from Californian pumps that had to be re-powered with Tier 4 diesels. Their phone number is 909 444 0027.

pumpnfinish 02-04-2017 reply profile send pm notify

I belive the biggest problem is a custom shop that knows nothing at all about the machine doing the work. If you need this pump to make money after then this is not the way to go. Would be cool to do for fun though.

pudg2 02-04-2017 reply profile send pm notify

I think you are making a big mistake , I bought a brand new deutz motor last year for under 12k , and we installed it , I do not think that gas motor will hold up to the lugging and load that we put these diesels thru , but that is just my opinion.

Pool man Travis 02-08-2017 reply profile send pm notify

The fuel economy will go way down and I am ready for that. I already picked up a used LS motor. The specs say it has over double the torque and hp at every rpm so we are asuming that is all the hydraulic pump recconizes. This shop specializes in these gm motors and is able to limit rpm in the tune.


The coupler was affordable to get done through a machine shop. Next is figuring out the bellhouse.



pumpnfinish 02-08-2017 reply profile send pm notify

I guess you will be finding out if it will work or not. At least your going bow tie with it should be reliable. Please post pics and videos of it pumping I can't wait to check it out. How will the exhaust be routed and muffled? Are you using the engine in Stock form or upgrading anything i.e. oil or air filtration?

Pool man Travis 05-12-2017 reply profile send pm notify

Motor is in and running great. Pumps water like a dream..

Next week will be the real test.

Quit and nice sounding pump with the LS motor


RJB 02-04-2017 reply profile send pm notify

Travis appears to be in Canada.  I would assume that the $10K rebuild price is in Canadian $'s, which would make the job ~US$7,700.00.  This also may limit his ability to import a 'previously loved' engine from the US.


orygun 02-06-2017 reply profile send pm notify

those are good pump cells to truck mount. you could go PTO and have a nice unit

Pool man Travis 02-08-2017 reply profile send pm notify

Shipping and exchange makes parts expensive here as well as bringing in a complete motor. We get hit with 12 percent sales tax and broker fees on top of what you pay.

Pool man Travis 02-08-2017 reply profile send pm notify

I thought about truck mounting it but don't want any fleet vehicles in my business at this time. Employees get paid well for usING there trucks. This also requires the need for aircompresors and water tank to be mounted to the trailer. I am hoping most of the hoses will rap around the rig.




pumpnfinish 05-14-2017 reply profile send pm notify

Hey Travis, good to see you got it together! I would love to see more pics. Especially of what you worked out for a bellhousing. A pumping video is a must. Coolest thing I've seen in a while, I've actually joked about doing it myself in the past. Chevy and schwing, it doesn't get any better for me.

b-alto 05-14-2017 reply profile send pm notify

Yeah good job!