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Steve570GT

oil pump identification

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I am rebuilding an M10. The block serial number is stamped 1457125, which i believe corresponds to an 84 318I. The rest of the motor is 2002 (80mm stroke crank, 121 head etc) however. The issue is the oil pump. It didn't have the pressure relief tube installed, There is the spring and piston assembly, but it is oriented completely differently. Engine ran fine prior to teardown. Have looked in realoem, but all the pumps I see (2002/E21/E30) either have the tube or are a different design altogether. Any ideas would be appreciated

Steve

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Never seen one like that. Three bolt flange suggests early type. Does it have any year stamps on core or other markings?

 

If it ran fine and measurements are within limits then i’d use it.

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Kinda off the wall, but BMW did build a marine version of the M10; wonder if that could be the origin....just make sure the pickup piece is compatible with a 2002 oil pan; I know the E21 version's pickup is different; not sure about the E30 version.

 

mike

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That round flange is quite early- or oddball.

 

It's also a gear- type pump, which is early.

 

Dig through early M10's on RealOEM- look for oil pumps with integral bypass valves.

 

Cause that's looking like what you gots!

 

Those stampings do NOT look like what the E21 stampings look like-

look for some cast- in date codes...

 

 

t

 

thinks it's older...

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(edited)

Could it be a really early, like nk era first edition m10? Anyone know those? That would be my guess. It looks like it's gear type instead of normal rotor pumps because there seems to be a location for another shaft.

 

....Toby just beat me.

Edited by Tommy
Toby :)
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It is a gear type (Eaton?) pump. It seems to have an internal bypass that doesn’t require the tube. The pump gears look fine and spec out as per the Haynes manual. I see no reason not to just leave it as is at this point. This engine was in a 69 1600 that ran fine. I put a different motor in that one. Now the question is that block serial number. It doesn’t correspond with any 1600 vin number. I think they started in the 156....... or so area.  I will look for date codes on the block.

steve

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What is the bolting boss outside of the pan flange on the lower left of the block?

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Not sure what you mean by the bolting boss, but there is an identical one on the rear on the same side. I have seen these on most M10's I believe. By the way, the following numbers are cast in the block 13C67 (date code possibly?) Then 121 021 10  02 0

Steve

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5 minutes ago, Steve570GT said:

By the way, the following numbers are cast in the block 13C67 (date code possibly?)

 

Here ya go

 

 

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I understand that. The engine number stamped above the starter is +1457125+ which doesn't correspond to any 1600/2002 vin numbers. It does correspond to a vin from a 1984 318I. By that time, vin numbers were much longer, but those seven digits were part of the vin. I think the block has a casting date of 1967, but not sure (13C67)

I guess this could have been a remanufactured block from the factory or as someone suggested possibly from a neue klasse 2000.

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What goes in the front cover opening?

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24 minutes ago, Steve570GT said:

Not sure what you mean by the bolting boss, but there is an identical one on the rear on the same side.

Ok, I looked at my photos of my block.

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With a March 67 block, what's the head date code?

 

Those number stamps look like the early font, but the unevenness agrees with the casting date.

 

Later oil pumps will have date codes cast into the aluminum parts- any markings on the pump itself?

 

Reman engines do sometimes have uneven stampings, but I've never seen a 7- digit rebuilt VIN from BMW-

maybe you could order one, but that's a long shot.  

 

t

still voting for 'very old engine out of something else'

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Head is in the shop now, so don't have date code. Its a 121 however

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