Lemforder PS Pump Rebuild kit?

[kallekula]

When my ps pump went out i kept the old one, a Lemforder. I would like to rebuild it but I’ve searched high and low for a rebuild kit without finding anything. Does it even exist? Does anyone know?

Thank you

[edjack]

PS pumps normally outlast the car. Did you run it dry?

[kallekula]

PS pumps normally outlast the car. Did you run it dry?
The pump wasnt working when i bought the car. Don’t know what the po did.

[BimmrMeUpSnotty]

I don’t think they had rebuild kits for these pumps. Get it from FCPeuro, lifetime warranty., new or rebuilt, same thing. While you have the pump off, pull the oil filter housing out and replace the gasket, if neglected, the rubber turns to plastic, and starts to crack open. A buddy of mine with a new to him E39 thought the oily mess was from his valve cover, some of it was, but most of it was from his oil filter gasket.
If that’s been neglected, what about the whole cooling system? Some people seem to think a cooling overhaul is replacing the radiator, expansion tank, water pump, thermostat housing, and the hoses up front, but there’s more…. All the rest of the hoses to the back, to the firewall, the heater pumps, the two plastic pipes underneath the intake manifold, while you are at it, replace the CCV pipes, the intake manifold gaskets, the two intake tubes with the bellows, this loves to crack where you can’t see it, on the bottom of the bellow. And the list goes on…

[crdiscoverer]

PS pumps normally outlast the car. Did you run it dry?

Mine failed 4 or 5 years ago. Like everything, even with proper maintenance some batches were perhaps more fragile. Don't remember exactly how it failed, though.

[SW530]

+1 what Snotty said and I'd add the valley pan gasket as well.

On the subject, when changing a gasket/seal, surface prep is everything. Shops are guilty of not properly prepping the surface because with shops time is money, and having you come back for repeat business is questionable business when it comes to not properly prepping surfaces, but.. many people really do subscribe to the ill notioned "European cars are designed to weep oil" mindset.

In my mind like surfaces and like design can be expected to seal the same albeit Ford, BMW, Subaru, etc, unless something like heat, inferior fasteners, or a buzzing engine negatively adds to the equation.

With all that said we have more modern solvents, tools, and equipment available to us than ever before. A bead blaster with the right type/size media works great for the gasket groove of valve cover gaskets. Properly cleaned they'll go forever without seeping. For metal surfaces and hard aluminum (if you have skills with the tool) a 1/4" die grinder with Scotch Brite Roloc discs (https://www.amazon.com/gp/product/B000B91090/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) makes quick work of prepping surfaces though you have to be very cautious of softer alloys, or use these newer Roloc Bristle Discs. (https://www.amazon.com/gp/product/B001EQG90Y/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1)

[BimmrMeUpSnotty]

Oh, for some reason, I was thinking Op had an i6. So forget the two plastic pipes underneath the intake manifold. But in the valley pan area, those two aluminum pipes always have those O-rings going, going, gone bad on both ends. Don’t just change those, while you are in there, the pipes manifold at the rear have those gaskets you want to swap out too. Been a while since I had to do that on mine. I should be due in the next two to three years to do them again.

[kallekula]

Im just asking for a ps rebuild kit :)

[SW530]

You are familiar with the term "snowball?" :)

You might want to consider this or a similar product (https://www.amazon.com/gp/product/B008PKWH6C/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1). Its a great thing to know exactly what's leaking to help limit mission creep. I give it five stars and I've used it in AC systems, cooling systems, and anything with a petroleum product.

Just to be sure, you did try and bleed the air out of that pump and see if it worked?

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In the past I used scotchbrite to clean those pipes, especially around the oring grooves making sure to debur the edges of the grooves.. you have to be a klutz to bugger them up but it seems I'm always getting the cars that klutz's worked on. Though, last time BMW only charged me $19 for one pipe and $14 for the other.. figured it was worth it.

[kallekula]

The old pump is toast and I haven’t opened it up yet too see what’s wrong with it. Im guessing it’s just bad seals.
The new pump i got was an AC Delco. Has worked fine for years.

[Chedley]

Get a ps pump from the junkyard or eBay.
I bought one for $30, keeping it as a backup just in case. But mIne is going fine, 22 years and counting, with regular fluid drain-and-fills every couple years or so.

[kallekula]

I want to repair the broken pump, not buy another one.

[BimmrMeUpSnotty]

Well, there are no rebuild kits, so you need to start tearing into that one, start measuring and sourcing the bits. Mcmaster-carr.com might have a bunch of bits, just gotta know what you are looking for. Me? It’s just a pump, rebuilding stuff is cool, that? I would just purchase one. Good luck.

[kallekula]

Thanks for the tip!
I’m not doing it for the money, just interested.
yeah i guess i have to take the pump apart and just measure all seals needed.

[BimmrMeUpSnotty]

Mcmaster is an engineering resource to order all kinds of cool bits from, not saying that they will have what you need, but you never know. Everytime I fabricate stuff, I get all the bits from them. Set up an account, they are awesome. You put the order in, you will get everything in by 11am the next day.

[SW530]

First time I've ever seen an emotional attachment to a power steering pump.. :)

[BimmrMeUpSnotty]

Well, on the older BMW’s, there used to be rebuild kits for the power steering pumps.

[SW530]

Yep, dumbells. So you could "power" your way through those low speed parking jobs..

[sienayr]

There's a guy named Jay Stratton over on the e24 forum that rebuilds ac compressors, power steering pumps, maybe some other stuff, he might be able to help you.

[kallekula]

Just realised I have a Luk pump, not a Lemforder :confused
The search is on again…
704924

[kallekula]

Looks like the seals dried up. Found info that some repair kit for some mercedes pump contains almost everything you need except for a small standard o-ring. Febi product nr 000 460 44 80.
704997

[jicaino]

Looks like the seals dried up. Found info that some repair kit for some mercedes pump contains almost everything you need except for a small standard o-ring. Febi product nr 000 460 44 80.
704997

That is correct. Came here to tell I repaired mine (also cut the prone to breakage arms and installed a laser cut plate after milling the front plane as for the bracked to sit on properly. If memory serves right it was a 8 mil ID o-ring. Did yours came with some weird looking sort of tiny umbrellas valves/seals?

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I didn't know it was mercedes. Now that I recall I got the seal kit at a mercedes-bmw parts store. They told me "this kit is for your pump" and I asumed it was BMW. Never realized I sacrilegiously put merc parts in my car :)

[kallekula]

Umbrella seals? No I dunno. Haven’t bought the seal kit yet.

[jicaino]

Umbrella seals? No I dunno. Haven’t bought the seal kit yet.

If you don't mind taking a picture of the kit for me, when you get it, I'd appreciate that. I didn't find where those weird items were supposed to go, and maybe they wasn't part of the kit itself and the store mixed the kit (It was opened but he assured me "it has more than you'll need") Maybe they threw together some weird stuff that didn't correspond to the rebuilt kit itself.

[kallekula]

Google the part nr. Shows everything in the kit.

[kallekula]

Does anyone know how much torque is needed to hold it together? The bolts was on there pretty tight.

[kallekula]

About 17 ft lbs should be good.
(Replying to my own question so I don’t forget)

[kallekula]

While waiting for the new seal kit I put the pump parts in the HF ultrasonic cleaner. Came out pretty clean.
Rightmost are all the seals that will be replaced. A subset of the MB pump kit + a small o-ring.

705165

[aristoc]

good that only the seals were dried up. easier than if the shaft was broken. Interesting project.

https://www.bimmerforums.com/forum/showthread.php?2415144-Luk-LF68-power-steering-pump-rebuild-info (https://www.bimmerforums.com/forum/showthread.php?2415144-Luk-LF68-power-steering-pump-rebuild-info)

[kallekula]

Nice! Now there are more than one DIY on this! Future repair attempts should be a breeze 😀.
Yeah it’s just old seals. Never heard about the axle snapping off though. Maybe if it runs completely dry for some time?
Anyhow, just got the seal kit for it. Only missing that small o-ring that I have to find.

[kallekula]

Oh and the kit was like $38 from ebay.
New pump can be bought for under a hundred.
https://www.ebay.com/itm/372165196249?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=tqSprHJARiK&sssrc=2349624&ssuid=zRZCX0ApRxa&var=&widget_ver=artemis&media=COPY

[Monark John]

This is very interesting. The part number leads to that Mercedes pump kit which explicitly states not to be used on a tandem pump. I just so happen to have a Cayenne whose pump is tandem, and I replaced. I may see if there is a kit for it as well. Porsche doesn't offer one, but will give you a new one in exchange for a little over an ounce of gold. So, see: we get by cheaply with BMW parts!

[SW530]

I love ultrasonic cleaners.. what agent did you use?

[jicaino]

Nice! Now there are more than one DIY on this! Future repair attempts should be a breeze .
Yeah it’s just old seals. Never heard about the axle snapping off though. Maybe if it runs completely dry for some time?
Anyhow, just got the seal kit for it. Only missing that small o-ring that I have to find.

Definitely my kit came with parts that weren't supposed to be in the kit.
I replaced what you show here and always ended up wondering if I was missing something when I did mine. Thanks for the pictures. I have a couple of ultrasonic cleaners in the shop (one small unit, about 2 pints, and a larger 1.5 gallon heated one) and they're very nice for parts cleaning, also I clean all my hardware when I tear into something so I can assemble things with grit and grim free fasteners.
Very nice job there!

[kallekula]

Simple Green 3D I think it’s called. It doesn’t discolor aluminum.

[SW530]

Cool, thanks.

[kallekula]

Normally I would have sprayed it down with a cleaner I have called Berkebil, but it’s so strong you almost need a paint mask! Unbelievable it’s approved for sale in CA. Loosens “anything”. I melted my plastic sink in the garage cleaning some junk. Plastic gloves is a must.

[Jason5driver]

Link to the rebuild kit ?

[SW530]

Sounds almost like aircraft stripper..

[kallekula]

Search ebay for the part nr. There are several vendors selling it.
705260

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Simple Green 3D I think it’s called. It doesn’t discolor aluminum.
Hmm I lied. It’s called HD PRO.
705261

[kallekula]

Found the missing o-ring seal at a place called Mcfadden-Dale. Very cool store.
With the new seal it was just to put the pump back together. This is a very easy repair, question is if it’s worth it. It all depends on the amount of free time one has I guess.

705291

[BimmrMeUpSnotty]

Time, the most important commodity. But I think it’s awesome that you took the time to figure all this out. Nothing wrong with repairing an old part that we normally would’ve tossed, because of time.

[kallekula]

Yeah. I’m on disability so all I have is time right now.

[kallekula]

Something that would be cool would be to source the seals yourself instead of that kit that is relatively expensive. Most is just standard sizes o-rings n seals except for those two black/white ones with an asymmetrical shape.
705308

[jicaino]

Something that would be cool would be to source the seals yourself instead of that kit that is relatively expensive. Most is just standard sizes o-rings n seals except for those two black/white ones with an asymmetrical shape.
705308

The weird "umbrella looking" valves I got were very similar to your metal-rubber ones except they didnt't have metal, or maybe they were corroded and slightly white, you know, how some aluminum alloys corrode.