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03-13-2018, 12:54 PM | #3214 |
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You think non-forum members replace their bearings? Hell no! How many of them had a rod bearing problems? I don't think its even close to %1. I am not telling anyone "NOT" to replace it but all I know is I won't do it..
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03-13-2018, 01:04 PM | #3215 | |
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DrFerry6728.50 |
03-19-2018, 12:54 PM | #3217 |
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Hello everyone,
My 08 M3 has rod knock and bearings were replaced at 94k when subsequently the engine seized within 10 miles after I picked up car. Took car to AutoTalent in L.A. for a complete rebuild and Zolti did a great job rebuilding engine with a new crank, bearings, etc. now at 135k and engine has been running perfect as it did when I first picked it up from them. My question is at the time they put in the bearing we put Bmw oem bearings but with that special coating on the bearings to reduce friction. My limited knowledge of the subject leads me to believe if there was ever an option that allows more cleanrece it might be better. In the last 3 years has there been any new bearings that have been ran for 15-30k miles pulled and showed signs of minimal or no wear? I’d prefer to pull my bearings soon and put in a newer designed and tested bearings with more clearance that I won’t have to worry about for another 100k miles. |
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03-19-2018, 01:33 PM | #3218 | |
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Also, are you referring to VAC's coated oem bearings or WPC treated oem bearings (people often refer to the WPC treatment as a coating)? You will find long discussions on the forum about BE bearings which are produced with industry standard nominal clearance (significantly greater than oem), but I don't recall seeing any pulled with 15-30k miles yet. |
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03-19-2018, 02:01 PM | #3219 | |
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///M Power-Belgium63325.00 |
06-10-2018, 08:47 PM | #3220 |
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Official ACL Rod Bearing Measurements
ACL Bearings
ACL Race Bearing Catalog: http://www.aclraceseries.com/images/catalog.pdf Wiki: Full Technical Specifications Photo Blog: About 100 full resolution photos ACL Bearings has a long history in the automotive and racing bearing market. They are the latest company to throw their hat in the ring of S65 aftermarket bearings. ACL markets these bearings as extra clearance. The measurements below will show them to have a little extra clearance over stock bearings. Appearance: At first glance, the ACL bearings look worn and/or damaged. To the untrained eye, they might look like they just came out of an engine showing excessive bearing wear. Don't let the looks deceive you. This is normal appearance for ACL race bearings. ACL addresses this issue in their catalog with a lengthy description of their appearance. (See "Picture Description" below for a direct citation from the ACL bearing manual.) Tools and Calibration All measurements are performed on new "virgin" connecting rods and "virgin" connecting rod bolts. These rods and bolts have never been used in any engine. Using virgin rods and bolts is an essential step for obtaining reliable and calibrated results. After use, every connecting rod big-end is deformed with extra diameter. Using virgin rods and bolts ensures that the measurements obtained will be the same reference as a new factory engine. It's the only way we know to ensure repeatable and reliable results. The image above shows the tools used for this job:
The Mitutoyo drop indicator is used to measure each bearing thickness. It's a very pricey tool that is accurate to 0.00005 inch. It features the ability to data log to computer, categorize the results with go/no-go screen colors, and it's the same tool used by BE Bearings to measure each and every bearing shell thickness. Before beginning to measure thickness, the instrument must be calibrated. The SPI gage blocks are used to set the proper instrument calibration. The bore gauge used to measure the bearing clearance and eccentricity must be calibrated as well. The 2-inch bore gage shown in the picture is accurate to 0.00004 inch. Production and Composition Manufacturer: ACL Picture Description Questions about the appearance of the RACE Series bearings are quite common, as this series of trimetal copper lead bearings have a very different appearance to regular aftermarket “ACL Duraglide” trimetal bearings, which have a light silver /grey appearance. Dimensions Standard (STD) Bearing Clearance Specifications Clearance Measurements Eccentricity Measurements
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06-11-2018, 09:03 AM | #3223 |
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I'll answer that: no they are not "repacked" BE, ACL are their own company and bearing producer long before for instance BE got established. The reason measurements are taken by the BE folks are in my view because they generously responded to the crowd i.e. us.
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06-11-2018, 07:21 PM | #3224 |
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You'll notice nobody, not any of the other manufacturers, will post any specs or measurements of their own. Bert's the only guy who's done it. That makes his wiki page the only place you'll find the pictures and data to back it up.
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06-12-2018, 01:54 PM | #3226 |
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06-12-2018, 08:34 PM | #3228 |
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Drives: 2011 E92 M3
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Because BE people bought a set of ACL bearings and measured them so that we as a community would have access to additional data so we can make informed choices.
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06-12-2018, 08:42 PM | #3229 | |
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For someone who lightly keeps tabs on the subject, it would have been nice to say, "Hey guys, we at BE picked up a set of ACL bearings and here's what we measured." Thanks for the clarification. |
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11-07-2018, 04:21 AM | #3230 |
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Located in Sydney Australia, yearly temps range from 5*C to 40+*C. My driving style is spirited, however i DO NOT like launching down the quarter mile, ripping burnouts and track racing. She only has 30,000km's and wish to preserve it the best i can.
Since owning an S65, i have like many, spent countless hours reading about oil. I have spent a further 3+ hours reading and searching through this thread today and also some time comparing data sheets from Castrol to Mobil & Redline. The conclusion i have come to is that i need a thinner oil next service interval and beyond. But i can't work out which Brand/Spec/Base Stock is better and why? I have had good experiences with Redline and Mobil in the past but not with this specific engine. I would really appreciate the opinions of BMRLVR or Kawasaki00 on the below data sheets and the reasoning there of. From my research, Redline uses Ester base, Mobile uses Synthetic base if this makes a difference or same same..? I have got my head around Viscosity cSt and HTHS Viscosity; Below Data specs are all within 0.5 of each other and higher is better,right? Also TWS doesn't mention HTHS. Comparing numbers foolishly this leads me to the Redline 5W40 being the best one for the job, IMO. The reason i ask is; The initial post that started this thread (Compliments to "regular guy") Under the "Proposed Solutions: Thinner Oil" Heading; Conclusion was never properly answered.... Where it mentions Redline oils and lists the different data sheets, i could not find BMRLVR or Kawasaki00's responses. If i am mistaken i am open to correction/education. Thanks in advance Castrol TWS (Ester Base) Density @ 15 ̊C, Relative ASTM D4052 g/ml = 0.853 Viscosity, Kinematic 100 ̊C ASTM D445 mm2/s = 22.7 Viscosity, CCS -25 ̊C (10W) ASTM D5293 mPa.s (cP) = 4879 Viscosity, Kinematic 40 ̊C ASTM D445 mm2/s = 160 Viscosity Index ASTM D2270 = 173 Pour Point ASTM D97 °C -39 Flash Point, PMCC ASTM D93 °C = >200 Ash, Sulphated ASTM D874 % wt = 1.29 Mobil 1 FS X2 5W-50 Value (Synthetic Base) Viscosity, cSt ASTM D445 @ 40ºC 104.3 @ 100ºC 17.1 Viscosity Index 179 Sulfated Ash, wt% (ASTM D874) 1.34 Phosphorous, wt% (ASTM D4951) 0.1 Flash Point, ºC (ASTM D92) 232 Pour Point, ºC -42 Density @15ºC g/ml, (ASTM D4052) 0.8499 Total Base Number (ASTM D2896) 12.6 MRV at -35ºC, cP (ASTM D4684) 24800 HTHS Viscosity, mPa•s @ 150ºC (ASTM D4683) 4.4 Redline 5W50 (Ester Base) ACEA Service Class A3 B3/B4 API Service Class SN/SM/SL/CF SAE Viscosity Grade (Motor Oil) 5W50 Vis @ 100°C 21.0 Vis @ 40°C 130 Viscosity Index 186 CCS Viscosity, Poise, @ °C 60@-30 Pour Point, °C -45 Pour Point, °F -49 NOACK Evaporation Loss,1hr @ 482°F (250°C), % 6 HTHS Vis, cP @150°C, ASTM D4741 5.0 Redline 5W40 (Ester Base) ACEA Service Class A3 B3/B4 API Service Class SN/SM/SL/CF SAE Viscosity Grade (Motor Oil) 5W40 Vis @ 100°C, cSt 15.6 Vis @ 40°C, cSt 97 Viscosity Index 174 CCS Viscosity, Poise, @ °C 58@-30 Pour Point, °C -45 Pour Point, °F -49 NOACK Evaporation Loss,1hr @ 482°F (250°C), % 6 HTHS Vis, cP @150°C, ASTM D4741 4.4 |
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DrFerry6728.50 |
11-08-2018, 07:26 PM | #3231 | |
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Never been a fan of the Redline stuff, we have ran it in motorsports world and just could never get it to work. It is high in NOACK so it does coke pistons up more than group 5 oils. Stay away from the newer Mobil 0-40 FS also, it is not as good as the older stuff. The Pennzoil 0-40 ultra euro or whatever they call it is really good. But dang is it expensive. Super low in Noack and it is one of the only oils that we have tried that continuously seems to have less consumption than the rest.
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DrFerry6728.50 |
11-08-2018, 07:43 PM | #3232 |
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What Redline oils have you used, specifically, to make such a statement ?!
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11-08-2018, 09:23 PM | #3233 |
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In my old e30 m20b25 and e36 m50b28 I have used Redline 5W40 and both engines ran a lot quieter. The tappets sounded smoother, and the engine just felt happier at high revs. This was after using mobile 5W30 at the time.
Maybe the BMW engines love the ester base stock oils. Hence why I'm asking is someone could shine some light on the syn/ester topic specific to BMW engines??? |
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11-09-2018, 11:18 AM | #3234 |
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Most of the 40wt stuff, including blended ones that are not for sale. I am sure they have things that work for a lot of folks. We have found better though, especially at 400 degrees oil out temp
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