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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 01-20-2012, 06:52 PM   #81
aggieE46
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You can wire it on, but it doesn't keep the shaft from breaking off.

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Originally Posted by flashtwosix View Post
PEI330,

I remembered reading your build thread on here and my330i that your oil pump nut was finger loose even after the special modified oil pump and ATI damper. You discovered this observation after your engine exploded and you disassembled your engine. If this is correct then is there really any cure for the oil pump nut?
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Old 01-20-2012, 07:22 PM   #82
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You can wire it on, but it doesn't keep the shaft from breaking off.
maybe my timeline reference is a little off. did Adam install this new custom oil pump assesmbly prior to his crash/explosion. the only reason why i am asking is because after the fire, adam opened up his engine to do an inspection to see how his engine held up. i remembered reading that after the fire he removed the oil pan and noticed the nut was extremely loose.
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Old 01-20-2012, 07:31 PM   #83
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Custom pump is after the fact.
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Old 01-20-2012, 08:31 PM   #84
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Yeah, the loose nut was found with the VAC "upgrade." No failures that I'm aware of with the 4 bolt pump which is the subject of this thread.
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Old 05-22-2012, 09:04 AM   #85
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I have a question

I notice someone saying if you run the engine backwards the nut will spin off. I'm planning on taking my 330 to drift days and will be spinning out a lot - does this mean if I don't declutch in time and the engine runs the wrong way I'm likely to break my oil pump?
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Old 05-22-2012, 11:09 AM   #86
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The engine will never "run backwards" and if the crank were to somehow magically start rotating in the opposite direction, you'd have bigger issues than the oil pump. More likely the sudden extreme accel and decel of the crank (caused by the sudden changes in tire grip) would yield some extreme torsional behavior which could potentially cause oil pump or valve train issues or even break the crank itself. I wouldn't worry too much though, your rear subframe is more likely to rip out of the chassis before you get to the point of engine damage....
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Old 05-22-2012, 11:29 AM   #87
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Hero is talking about spinning out and rolling backwards without pushing in the clutch. The engine dies and the tires find grip and turn the engine backwards. DON'T DO IT. Be ready with the clutch.
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Old 05-22-2012, 12:59 PM   #88
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Yeah exactly that ^^

I take it even if I got the VAC OPN, if I spin and roll backwards and missed the declutch, the oil pump is going to shit the bolt off still? Not that it matters if the rest of the engines going to disintegrate as well.

Just never heard of a car doing that before.. one to watch out for..

Last edited by 330Hero; 05-22-2012 at 01:00 PM.
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Old 05-22-2012, 01:05 PM   #89
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Yeah exactly that ^^

I take it even if I got the VAC OPN, if I spin and roll backwards and missed the declutch, the oil pump is going to shit the bolt off still? Not that it matters if the rest of the engines going to disintegrate as well.

Just never heard of a car doing that before.. one to watch out for..
Or you can get the vaio custom oil pump. It will solve the issue or concern you have.
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Old 05-22-2012, 01:10 PM   #90
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Thanks, where would one aquire a vaio pump? Cant see any shops that sell one online..


(Your car looks amazing in your sig btw - top bombing!)
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Old 05-22-2012, 01:19 PM   #91
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Thanks, where would one aquire a vaio pump? Cant see any shops that sell one online..


(Your car looks amazing in your sig btw - top bombing!)
I actually have one for sale out of my car. I just have been lazy to post it up for sale.

It is the same pump that PEI330CI went into thorough detail here: http://forum.e46fanatics.com/showthr...891&highlight=

Thanks for the kudos. i
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Old 07-10-2012, 02:41 PM   #92
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Hi,
I'm new here. So i'm geting my car redy for some fun (drifting) it is going to be track car only e46 330. For now it will be preaty standart. I want to have few events this year.
This thread is very informative thanks.
I got that nut welded on my and hope it will last for now I'm geting optional low pressure worning light as well.Just pecaution.
So I was thinking would u not be able to weld srocket to the shaft on other side it looks like there is some little space to do so. and then put the cover on and press it in.
Thats my thought. Don't be throwing stones on me.

English not my native language.

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Old 01-29-2013, 11:58 PM   #93
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Hi all! I'm looking for vaio custom oil pump. Could anyone help me, whete can i get it?
Thanks!
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Old 01-30-2013, 12:13 AM   #94
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Quote:
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Hi all! I'm looking for vaio custom oil pump. Could anyone help me, whete can i get it?
Thanks!
PM vaio76109 and ask him nicely and he might do it for you...
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Old 12-05-2013, 12:37 PM   #95
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Is the "vaio" oil pump the same part number as the OEM pump for our cars, just with a custom shaft and sprocket?

Edit: I think I figured it out.
I was wondering how it could be the same since the shaft has such a large bump out behind the sprocket, but I noticed in one of the pictures that the cover on the pump has been machined down.

Last edited by imagine-02; 12-05-2013 at 12:40 PM.
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Old 12-17-2013, 11:30 AM   #96
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Quote:
Originally Posted by Ivor-BMW View Post
Hi,
I'm new here. So i'm geting my car redy for some fun (drifting) it is going to be track car only e46 330. For now it will be preaty standart. I want to have few events this year.
This thread is very informative thanks.
I got that nut welded on my and hope it will last for now I'm geting optional low pressure worning light as well.Just pecaution.
So I was thinking would u not be able to weld srocket to the shaft on other side it looks like there is some little space to do so. and then put the cover on and press it in.
Thats my thought. Don't be throwing stones on me.

English not my native language.
Old post, but I was thinking about doing the exact same thing. TIG weld the sprocket to the shaft from the backside and press it into the housing. This *should* prevent the sprocket from shearing off as compared to just welding the nut to the sprocket.

Thoughts @PEI330Ci?

Last edited by Flop; 12-17-2013 at 11:30 AM.
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Old 12-17-2013, 11:46 AM   #97
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When it breaks in the welded nut form, is the shaft breaking or are the slots on the shaft, which hold the sprocket, stripping?
If it's the shaft breaking, welding the sprocket on isn't going to help. If it's just the slots stripping, then I would think welding the sprocket right to the shaft would work.
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Old 12-17-2013, 01:18 PM   #98
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When it breaks in the welded nut form, is the shaft breaking or are the slots on the shaft, which hold the sprocket, stripping?
If it's the shaft breaking, welding the sprocket on isn't going to help. If it's just the slots stripping, then I would think welding the sprocket right to the shaft would work.
The shaft shears at the splined portion, which is smaller in diameter. Welding the sprocket to the larger OD portion of shaft should prevent it from shearing.

Last edited by Flop; 12-17-2013 at 01:18 PM.
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Old 12-17-2013, 01:24 PM   #99
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I understand what you mean now.
I might try welding it like that this winter while the car is already ripped apart.
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Old 12-17-2013, 01:26 PM   #100
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I'm assuming the welded sprocket/shaft assembly isn't heat treated post-weld, right? Or has someone already tried that?
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