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09-10-2019, 09:13 AM | #111 |
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09-10-2019, 09:35 AM | #112 | |
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09-10-2019, 09:37 AM | #113 |
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I don't think I've seen any of the lead bearings looking decent, but I agree some of the updated bearings have looked "ok" in a couple cases
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09-10-2019, 04:37 PM | #115 | |
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At best, the new 702/703 bearings have never looked excellent - just OK. Perhaps if I am bored some day, I will take my BE bearings out for a quick inspection.
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09-12-2019, 04:35 PM | #116 | |||
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09-13-2019, 08:00 AM | #117 |
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Signed off versus preferred are different things. You guys all have and to blink when margin preservation is part of your job as an engineer. Maybe even kicking and screaming, but you do.
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09-13-2019, 08:02 AM | #118 |
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09-19-2019, 01:01 PM | #119 |
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Soooooo I suspected I needed a valve cover gasket This morning. Needed an oil change anyways....
Smelled a bit of oil on exhaust manifold- my Z3 with 50,000 miles. It's a 2000. I've been using Redline in the car since I got it with 32k on the clock My mechanic said he never ever sees the valve train so clean at this mileage as new
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09-19-2019, 03:04 PM | #120 | |
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09-19-2019, 03:07 PM | #121 | |
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Now: 2017 Corvette Grand Sport, 2021 AMG C63 S sedan
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09-19-2019, 03:26 PM | #122 |
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So to clarify
I've put 18k miles on it. The first 32k miles are an UNKNOWN. And there is z e r o varnish/residue/sludge nada
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09-19-2019, 03:37 PM | #123 |
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That's a bit worse than my S65 looked inside at 104k when I did the valvecovers. It looked new. Cam lobes were maybe a bit polished, but just a bit.
Also, I don't think anybody is disputing BMW knows how to build a topend. Except for some of the VANOS issues. But other than that and also the valvecover gaskets and cam position sensors and sometimes the coils, they're fine. Also the DI injectors and coils on the turbo cars. But otherwise, nails. Your mechanic must not see many well-maintained cars, because I don't do anything special and my 328's valvetrain looked like that too at around 80k
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09-19-2019, 03:38 PM | #124 | |
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But cool story bro.
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09-19-2019, 03:46 PM | #125 |
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Thanks for that
It's about the cleaning power of Redline I've seen so many valvetrains with that red gunk left from "BMW FULL SYNTHETIC" Group 3 junk
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09-21-2019, 01:17 PM | #127 | |
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09-21-2019, 08:42 PM | #128 |
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Regardless, short OCI with good oil will pretty much guarantee a clean engine. Especially if the engine is not daily driven where it never gets up to temp properly.
The inside of our Honda race motors are clean. And they started life as a race motor at 160k km. But we usually change oil every 2400 km. And they burn half a liter every couple hours...
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09-21-2019, 10:46 PM | #130 | |
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09-26-2019, 11:41 AM | #131 |
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The “you must use the 10W60 that BMW specifies” crowd will struggle with the Bimmerworld article. I struggle with the 2.5L per 1000 mile acceptable oil consumption. The S65 is a four stroke not a two stroke motor.
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09-29-2019, 03:13 PM | #132 | |
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Sure some consumption is fine but to claim it "should burn oil" is clearly bs. Mine for instance have never burned anything measureable between changes, so should have been toast by now... |
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