Are Kaase Oil Pumps Rebuildable

After my crankshaft breakage I took apart my Kaase oil pump to make sure it wasn't full of trash. It was surprisingly clean but there are a few small indentations in the vane and rotor where it looks like something may have gone through it. Is it possible to just replace the two rotating parts with new ones? I haven't had time to call Kaase during working hours so I was wondering if anyone on here has done this. I'm not sure if these components are "fit" to the housing or if they are dimensionally the same so that they could be changed out. Any thoughts? I'm not sure if these indentations were from the breakage of if they've been in there for a while.

got one here that is the same way, gonna break out the files and emery cloth on try and salvage it.....

Yeah I hate to buy a whole new pump because its not too bad but I also hate to put it back together with some small grooves.

You guys can go get a stock M84 Melling pump at AutoZone and pull the scroll and rotor out of it. Try them in your Kasse pump and see if it fits. I believe they do. Don't get a high volume pump, just the standard unit.

Uncle Charlie

ill fix mine, its a cheapskate motor i got like zero money in so far lol.

I'll try that Charlie. That's good info. Thanks. Sent you a pm.

I'd think the rotor and scroll can be had from kaase.....if not..like C. evans said...the std volume guts should fit.

I suspect that a little 'love' on the parts you have will be good enough.

In most cases, simply disassembling and cleaning the pump housing and blending down any high spots in the gerotor parts and pump's gerotor cavity can be all that is needed. Be sure to stay within the pump's design specs.

The 385 Series oil pumps are very forgiving, thanks to the amount of oil that they pump and also because the bypass re-routes excess oil back to the inlet side of the pump body. We have re-built pump models that are no longer made and that the racer wanted badly to continue useing but had absolutely destroyed (and I mean trashed) internal components--once cleaned up the pumps are still holding perfectly normal oil pressure.

I could be mistaken but of the Kaase pumps that we have disassembled and modified for customers who wish to use them in very high performance applications, I see nothing special about the internal components. By that I mean that the internal parts seem to be nothing more than OEM Melling standard volume pump parts. Therefore, the OEM Melling rebuild kit should be all that is needed (IF it is needed). That would be the K-84 Kit, or Summit Racing part number MEL-K-84

http://www.summitracing.com/parts/mel-k-84

Paul

512Fairlane wrote:After my crankshaft breakage I took apart my Kaase oil pump to make sure it wasn't full of trash.... there are a few small indentations in the vane and rotor where it looks like something may have gone through it. Is it possible to just replace the two rotating parts with new ones?

This sounds like a complete non-issue; just smooth out the few high spots on both mating parts, same on the gerotor cavity, clean it and put it together. Use a small flap wheel or flap/scotchbrite wheel in an air tool.

richter69 wrote:got one here that is the same way, gonna break out the files and emery cloth on try and salvage it.....

That or same as above.

Paul Kane wrote:...Therefore, the OEM Melling rebuild kit should be all that is needed (IF it is needed). That would be the K-84 Kit, or Summit Racing part number MEL-K-84

http://www.summitracing.com/parts/mel-k-84

Paul

By the way, the Kaase pump should use the red spring from the K84 kit, not the blue-grey spring.

Paul

Lots of great info.....
Thanks

Thanks gentlemen. This site is great.

That is great info,nice to know they interchange.

Go buy a standard Melling 351 C oil pump, remove internals, throw housing in the trash, install internals into Kasse housing. That came from Kasse himself. Did that with mine after internals were chewed up with tiny pieces of roller lifter needle bearings.

And I believe was under 30 bucks if I recall correctly