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02-20-2019, 07:33 PM | #1 |
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Upcoming Rod Bearings 02/2019
Evening y'all!
Having the rod bearings done next week. Car is a 2006 with 58k miles. I've only owned it for 4 months so I am doing it as preventative maintenance/peace of mind. I ordered the ECS kit with WPC treated bearings and OEM bolts, I am also doing the VAC oil pump upgrade kit, CPV valve, motor mounts and motor mount arms bolts. Anything I'm missing? Trying to save as much future labor as possible. Thanks for your time! |
02-20-2019, 07:54 PM | #2 |
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Vanos bolts and vanos hub.
The tabs on the hub can break. I think turner or vac has hubs with thicker tabs, but the hub from turbotoy is the best: http://www.tt-hub.com/ Its made from C300 steel, which is a very very exotic type of steel, normally only found in aircraft (the vac vanos hub is made from 'ordinairy' tool steel (4340)) That vac oil pump upgrade kit, is that only the upgrade for the chainsprocket or do you get a complete new/refurbished oil pump? The s54 oil pump also has an internal piston (to control the oil pressure) that is prone to wear. See my post here: https://www.zpost.com/forums/showpos...8&postcount=50 Also the chain guards on the s54 are an attention item. But thats I think also quite a job because you have to remove the timing chain cover. You can also replace the timing chain tensioner, but I think that that issue is a bit exaggerated.
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02-20-2019, 08:05 PM | #3 | |
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Yes only sprocket. The internal piston is not interchangeable because the s54 has a different pressure which is why bmw doesn't sell it separately for the the S54. Would the vanos hub cost me a lot more labor while doing the rod bearings? |
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02-20-2019, 10:24 PM | #4 |
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Do the Vanos and upper chain tensioner when you do valve adjustments. Rod bearings is bottom end work
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02-21-2019, 03:25 AM | #5 | ||
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BMW doesnt sell that piston for the s54 pump, but somehow in Germany tuners can get their hands on them and coat them with an anti wear surface. I wonder if its different from the m54 one. I've never seen anyone actually do that comparison. Oil pressure is also set by the spring tension behind that piston. Quote:
Obviously every other job is more labour, but so is putting a car on a lift and getting things settled with a customer.
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02-21-2019, 05:54 AM | #6 | |||
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Do you have a link to the oil pump piston because I cannot find one for sale. |
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02-21-2019, 08:33 AM | #7 | |
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http://www.ma-autoservice.de/ I don't know if they sell them seperately or to the US or whatever. But they have coated oilpressure pistons. That first link claims that they are DLC coated (for €80 when fitted with their rodbearingservice), which is a very very wear resistant coating. Most germans speak English I think, for sure if money is to be made... My guess is that they are m50 pistons. Those pistons are also used in the s52 oil pump and the euro s50b30. When the s50b32 (euro) came out bmw stopped listing those parts but my guess is that the design didn't change. Lots of parts this deep in an engine dont change the complete lifecycle of an engine family (for instance the m54 still has the same rodbearings as the 1972 m10 engine, thats why you can pick up a set for 20 bucks). Just a thought
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Last edited by GuidoK; 02-21-2019 at 08:38 AM.. |
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02-27-2019, 11:36 AM | #9 |
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After you change the rod bearings run redline 5w50 and you won't have to deal with rod bearing issues again.
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02-27-2019, 12:41 PM | #10 |
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02-27-2019, 12:50 PM | #11 |
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It's been thrown out there by the famous engine builder Troy jeup who specializes in N/A BMW engine builds like strokers etc. Basically when comparing engines that have the same if not tighter clearances they don't use the garbage 10w60 which shears down to almost a 40 weight after a few heat cycles and provides better protection since engines with this sort of bearing spec all use 5w50. I believe he has 700+ motors running out there all on 5w50 and not one failure. I just picked up my second M roady and got 5w50 redline.
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02-27-2019, 03:53 PM | #12 | |
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https://www.zpost.com/forums/showpos...72&postcount=1 |
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02-27-2019, 03:59 PM | #13 | ||
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02-27-2019, 04:24 PM | #14 |
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Having too much zinc isn't a great thing either...Your cats would have a shorten life if too much of it gets into the combustion chamber. That's why a lot of "Race" oils that have lots of zinc have a "off road use only" label, meaning that you should run it without cats.
Believe what you want to believe, but I'm a data-minded person - show me data to prove it. If Liqui Moly can provide only 2ppm of lead wear after my rod bearing change, why would I need to look elsewhere? Regarding that 175k miles M3 - I would be a believer if he pull the bearings and show no copper. Just because the car is still running doesn't mean that it won't throw a rod at any moment. |
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02-27-2019, 05:44 PM | #15 | |
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I'm just going with the data that I've seen and the real world experience of other people. Again, 700+ built engines ranging from stock, stroker, and supercharged s54/s65/s85/s63tu's over multiple years and miles of racing that he's built and not one failure from rod bearings is enough for me to make a change. It's all personal preference to what you're comfortable running. But facts aside, 10w60 will cause your rod bearings to fail sooner or later. My car is at 53k miles and I'll be running redline 5w50 for the rest of its life, so if it fails I'll post my results. I probably will change the rod bearings as well when I get a blower on it with treated bearings for a piece of mind so I can see what type of wear (if any or a lot) there is with running 5w50.
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02-28-2019, 01:07 AM | #16 |
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The only way to tell if 5w50 gives longer bearing life is to open up an engine that has 50k mileage with 5w50 and examine the bearings.
I dont think zinc or phosphor additives will extend rodbearing life as I think the rodbearingwear in the s50/54/65/85 is an oil cavitation issue and not a friction wear issue. The round spots that show as the initial wear pattern on bearings that start to show little wear are a tell tale sign to this. |
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03-06-2019, 11:46 AM | #17 |
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Done. Showing significant wear at 58k. Car was babied by the last owner and I have driven like it's meant to be for 2k from 56k.
Last edited by JimBob0047; 03-06-2019 at 12:46 PM.. |
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03-06-2019, 01:04 PM | #18 | |
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Glad you got this taken care of early. Your car looks so clean.
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03-06-2019, 01:58 PM | #19 | ||
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Thank you! |
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03-06-2019, 02:45 PM | #20 |
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Nice one, looks like you dodged a bullet! That is exactly how mine looked at the same exact miles.
Between the previous owner and myself, my 58K miles had quite a few track days on it. I think this really illustrates that regardless of how the S54 is driven, this issue really should be addressed sooner rather than later.
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04-28-2019, 09:18 AM | #21 |
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Just did mine with 63,000 miles but I went with the BE bearings. Mine looked just like yours.
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