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BMW 3-Series (E90 E92) Forum
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Bimmerlabs 330i Tune DIY Step by Step
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09-30-2021, 03:01 PM | #683 |
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I'd have to have a closer look at my stand engine when I get home but I think the entire outside of the engine is magnesium so that could be too.
The bottom part is the bed plate which I'm sure is aluminum, however the bolt threads up into what is the magnesium outer shell of the engine. I'd prefer to use aluminum bolts.
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Biginboca3793.50 |
09-30-2021, 03:04 PM | #684 |
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Not true. At least not in my car. I just did a quick test with a magnet with those bolts. I tried my test with other bolts while I was at it: the alternator bolts are definitely aluminum, whereas the VANOS solenoid bolts were steel.
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09-30-2021, 03:32 PM | #685 |
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Guys, I have an update with my project: I just wrapped it all up. Tune + 3-Stage -IM swap is now officially completed. I went on a test drive grinning ear-to-ear like a fool. It was worth every penny and every minute of the effort I put into it. My DD is no longer boring and drives like a champ.
Special thanks to E92_William and hassmaschine. |
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E92_William1435.00 ryanful51.00 |
09-30-2021, 03:37 PM | #686 | |
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09-30-2021, 03:49 PM | #687 |
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Did you mean the rubber disc with the screw poking out of it in my first photo attachment? Yeah, it is still there
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09-30-2021, 03:52 PM | #688 | |
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https://www.pelicanparts.com/More_In...IaAsgwEALw_wcB |
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09-30-2021, 04:11 PM | #689 | |
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09-30-2021, 04:13 PM | #690 |
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What long term difference does it make? Mine fell out a very long time ago and I found it in the garage but didn't know what it was, put it somewhere and now it's gone.
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09-30-2021, 04:16 PM | #691 |
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Rattling, alignment with the screws/ducting that goes to TB, and your airbox may have a tendency to sit on the upper rad hose or press it down as you reinstall/maneuver the airbox components back in. Bad news for a piece (the upper rad) that self-destructs on its own :P
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09-30-2021, 07:38 PM | #692 | |
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Oil filter housing bolts onto to the head, uses steel bolts. Vanos solenoids bolt onto the head, they use steel bolts. Intake manifold bolts onto the head, steel bolts. Alternator bolts on to the magnesium outer jacket of the block, it uses aluminum bolts. Starter same, aluminum bolt. Knock sensors same, aluminum bolt and so on. Oil pan bolts on to magnesium bed plate, aluminum bolts. Accessory belt tensioner bolts onto the front outer part of engine, which is magnesium, aluminum bolt. The accessory idler pulley bolts onto the alternator, if my memory is correct, steel bolt, since alternator is aluminum itself. Engine mount support brackets bolt onto magnesium outer jacket again aluminum bolts. It is not arbitrary choice. |
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Biginboca3793.50 |
09-30-2021, 07:45 PM | #693 | |
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That rubber disc there doesn't look factory. There is nothing like that on mine. If you are not original owner, previous owner may have lost that dome rubber mount and put that rubber disc instead. The rubber disc will still help, the air box won't be knocking right onto the frame over there as car bounces at road bumps. But it won't prevent lateral movements of the air box at the bottom. |
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09-30-2021, 07:46 PM | #694 | |
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09-30-2021, 07:58 PM | #696 | |
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I personally don't like aluminum bolts particularly because of their single-use torque-to-yield type of usage. I always end up slightly under-torquing them (the degree/angle-torque part) because I am paranoid about snapping them. They also feel like cheese to me. I know, I know there are legit reasons like you said. |
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09-30-2021, 08:31 PM | #697 | |
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What an underwhelming challenge after the 3-SIM work |
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09-30-2021, 08:46 PM | #698 | |
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-It bolts into magnesium & OEM bolts are aluminum for N52 -Looked into this as I was assured SS & mag were compatible -Depending on the grade used, corrosion may not be a concern -BUT the expansion and contraction rates do not match!!! -Aluminum bolts definitely needed -OEM bolts too short given guard's thickness & also only come in a full bedplate bolt set -Guard seller specified an M8 x 40 bolt & recommends medium strength Loctite -May be different length for other guard designs, but easy to measure yourself -This is what I bought & plan to shorten to 40mm -Only thing I'm not 100% sure of is the flange dia, but likely fine & if not, easy to file https://www.fcpeuro.com/products/bmw...al-11137582340 |
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Biginboca3793.50 |
10-01-2021, 10:37 AM | #699 |
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Keep in mind the N54 seal is the same, so the kits that come with steel bolts are probably for N54s. |
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Biginboca3793.50 |
10-01-2021, 10:49 AM | #700 | |
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And looking at their guard it’s going to be hard to make it work with any screws that aren’t socket head.
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10-01-2021, 10:53 AM | #701 |
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For the record here’s all the crank hub seal guards I’ve found so far…
https://vargasturbo.com/product/vtt-...nk-seal-guard/ https://www.maloindustries.com/produ...ection-plate-1 https://www.kiesmotorsports.com/prod...82-f83-e92-etc https://store.vacmotorsports.com/vac...s55-p4964.aspx https://www.ecstuning.com/b-ecs-part.../005771la01~b/ https://www.ebay.com/itm/254984169174
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10-01-2021, 10:55 AM | #702 |
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Any thoughts on using this with the ECS guard i have coming…
2pcs M8 x 1 x 40 mm Titanium Ti Screw Fine Thread Bolt Allen Hex Socket Cap Head/Aerospace Grade https://www.amazon.com/dp/B083C5R7PG...HJAEXRY48CGRM0 Or this… https://www.probolt-usa.com/aluminum...8x1-25mmx40mm/
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Last edited by Biginboca; 10-01-2021 at 11:01 AM.. |
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10-03-2021, 10:21 AM | #703 |
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In terms of galvanic corrosion with magnesium, Titanium is worse than steel or stainless steel. The closer the two metals in contact in this chart the less galvanic corrosion will happen. And titanium and magnesium is very apart from each other (about 1.5 volt difference between the too):
For galvanic corrosion to happen there has to be electrolyte solution between two dissimilar metals. Road salt mixed with rain, snow slush is one. Because the bolt heads are pointing down in this case, the salted water will drain won't not stay. Also there is aluminum between the magnesium and the bolt's exposed head with these covers. That may be reducing the effect too. The stainless steel bolts may have some plating on them that would reduce the contact and also corrosion as well, but it is not specified. Overall it is better to use aluminum bolt, I think. |
10-03-2021, 01:19 PM | #704 | |
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