used e34 oil pumps?

[haaken675]

Hey guys. Just curious to see if people are putting in used e34 oil pumps, or buying new?

I didn't think that a new oil pump would be as expensive as they are...

[pazi88]

Used pumps are just fine if they are in good condition (as they normally are). But if for some reason the pump is worn, then it's good to buy new. It's not crazy expensive and it's even cheaper to just buy new gears for the pump. For example if something has gone through the old gears.

[haaken675]

Hopefully I can find a decent quality used pump then. I picked up a fairly low mileage (at least that's what iv been told) m52b28 from what has been decoded based on the engine marking to be an e39, so now I am trying to gather all the necessary pieces....

[pazi88]

In first post you were talking about e34. If the punp comes from e34 m50 without vanos, don't put that to e39 m52 engine. The non-vanos m50 oil pump is smaller than m52/m50-vanos pump.

[haaken675]

I'm a little lost on what you are referring to. I have an m52b28 waiting to go into my car. From what I understand, I need an e34 m50 oil pan, oil pickup, and oil pump.

[ForcedFirebird]

I'm a little lost on what you are referring to. I have an m52b28 waiting to go into my car. From what I understand, I need an e34 m50 oil pan, oil pickup, and oil pump.

No. Just the pan, pick up TUBE, and dip stick. The pumps are the same for all the single vanos engines, the pickup tube is what decides if it is front or rear sump.

[haaken675]

ah...I had read a few threads a while back that stated you needed the oil pump as well. That's awesome then since it's one less thing I need to purchase!

[pazi88]

ah...I had read a few threads a while back that stated you needed the oil pump as well. That's awesome then since it's one less thing I need to purchase!

yes as said you don't need the oil pump. They all have same casting so you can install e34 pickup to m52 oilpump. But this is the reason you don't want to swap the pump:



the two left ones are gears from non-vanos m50 oil pump and the right one is from m52 oil pump.

[ba114]

The m52 oil pump housing will not bolt to an M50 and vice versa. The rear most bolt does not align.

[ForcedFirebird]

The m52 oil pump housing will not bolt to an M50 and vice versa. The rear most bolt does not align.

http://www.realoem.com/bmw/enUS/partxref?q=11411740154

This shows all the e36 oil pump housing were the same?

[ba114]

http://www.realoem.com/bmw/enUS/partxref?q=11411740154

This shows all the e36 oil pump housing were the same?

Maybe for US cars. I tried to bolt my m52 oil pump into my M50 and only 2 bolts would go in, not the rear most. I have both blocks standing next to each other at the moment and it's visibly different mountings.

My m52 is an aluminium (euro) block however so perhaps they were cast different.

[pazi88]

Maybe for US cars. I tried to bolt my m52 oil pump into my M50 and only 2 bolts would go in, not the rear most. I have both blocks standing next to each other at the moment and it's visibly different mountings.

My m52 is an aluminium (euro) block however so perhaps they were cast different.

You have non-vanos engine? Even the euro m52 alu block has same oil pump as m50 with vanos. Only different one is m50 without vanos. It has the smaller gears and the oil pump housing is bit different:


(left m52, others m50 non-vanos). That one bolt ole is located bit differently but as you can see it can be drilled out to match the older pump.

[ba114]

Isn't that what I said??
I have 2x m50tu blocks and 1x m52 blocks. The m52 pump does not bolt up to the m50tu blocks as the rear most mpunting hole is not the same.

[pazi88]

Isn't that what I said??
I have 2x m50tu blocks and 1x m52 blocks. The m52 pump does not bolt up to the m50tu blocks as the rear most mpunting hole is not the same.

No: I meant that the m52 oil pump should mount to m50tu (m50 with vanos) directly. That's according to my testing and according to the part numbers. m50 without vanos is different thing.

EDIT all thought there may be some overlap in parts between the engine generations as there is in many cases with bmw. For example most of the m52 engines uses oil filter housing with plastic cap but the earliest ones use the same oil filter housing with metal cap (and power steering pump etc.) as m50 engines.

[ba114]

Right. Well per pic above, oil pump from aluminium block m52 from '96 328i fits all but one of the mounting holes on m50tu as stated previously.

You mentioned it would fit if you enlarge the hole in the pumps mounting.

I think we're saying the same thing.