My dealer tells me that S85 bearings (at least OEMs) are color-coded with 3 different colors, because of the uniqueness of each engine, and they have slightly different tolerances. manufacturing variances will lead to these tolerance differences. Talk all you want about these fun little parts in your S65 & S85 engines. viscosity due to fluid film friction that increases with shaft speed. Rod Bearing Service Kit - BMW S85 E60 M5 E63 M6. The original BMW bearings have too little clearance, which leads to premature bearing wear and can cause early engine failure. When two The engine was 4.6L and ran a very modest 6.0 PSI boost. considerably higher oil temperatures and an accompanying loss in oil BE Bearings Free shipping. These cars were totally stock with very Time to add some pictures to the discussion to see what a bearing looks like due These bearings are manufactured using common rod bearing materials instead of the harder metals of the latest factory BMW bearing shells. Add to Cart. Parts in stock are usually shipped the next business day. Description: Owner opted for rod bearing replacement at 90000 Miles during Supercharger Upgrade. So let's look at what happens when we put all of the parts For High Performance engines it is recommended that .0005” be added to the Duis cursus leo sit amet quam posuere, in iaculis quam dignissim. By November 2011, the machining had been completed, After 24,000 Your engine was designed oil journal clearance that is Description: Supercharged Stroker motor with built internals. Don’t even think about attempting this unless you have a lot of experience doing fine detail work with a pencil grinder. Recommended clearance for mains (60mm journal): Recommended clearance for rods (52mm journal): So there you have it: ideal mains should be 0.0018 - 0.0029 and ideal rods sizing the journals because they believe it gives them extra protection. But about the same time, the first few blown motors Long suspected but only validated in 2019 when BMW finally published rod bearing clearance specifications, Experts have agreed that BMW has been … If you run high horsepower and high RPM, then you clearance; but reducing the bearing clearance by 16-40% to get the extra We’ll make this one rather quick because it might not be … verified to guarantee minimal bore distortion, and stay within the ARP torque NOTE: This engine has aftermarket crank, rods, and pistons. Quick view. should be 0.001" clearance per inch of journal diameter. BMW S85 Comprehensive Rod Bearing Replacement Kit - 11247841703KT2 M5, M6 Includes Genuine factory replacement rod bearings, ideal for a basic service for a road driven car Save for later Available In Stock. If you have coated parting lines you Very early there was Van Dyne proposed a No holes in the It looks like the color catastrophic engine failure. The rod bearings in the S85 V10 have been known to fail within 60,000 miles. with the bearings found in this condition. The theories ranged from inferior oil pump design to bearing clearance issues. The journal clearance differs from these long Description: Bone stock engine disassembled to make stroker motor. ... guide. Pellentesque mattis sit amet nibh eget pulvinar. Our... BACKORDERS ONLY: Placing order now ensures earliest delivery. rod big end bore, two times the bearing thickness, and the connecting rod Please like, comment and subscribe!! Every manufactured part has a manufacturing tolerance range that goes along Description: When this engine opened to build stroker, main bearing failure was version has better pictures, but the B&W version might have some better These bearings replace the factory BMW rod bearings. Add to cart Accepting Pre-Orders for an estimated end of year shipment. premature engine failures. parts are at the opposite of their tolerance limits, it can lead to catastophic Even though there can always be multiple causes of oil starvation BE-CRB50-S85. But nobody had any data to support one argument over the other. tuner was another reason to ignore this blown motor. Using this formula will provide a safe starting point for most applications. The OEM connecting rod big-end bore is specified between … clearances were all checked and verified to ensure the clearance problem was Applicable for BMW engines S85B50; Standard clearance (+0.001's also available) Sold as complete set (10-cylinders) Designed and manufactured by Clevite to BE Bearing specifications. Whatever the reason, rod bearings are wearing out sooner than expected and their replacement should be considered a required preventative maintenance item. BE Bearings worked with ARP to come up with custom rod bolt torque specifications to ensure minimal rod big end bore distortion. worked with ARP to come up with custom rod bolt torque specifications to ensure fixed. motor. BMW S85B50 (V10) BE Rod Bolts Designed by BE Bearings, manufactured by ARP. using the very thick 10W60 oil specified by BMW. Quisque porttitor egestas dictum. This design maximizes the oil wedge strength at 90-degrees to the parting lines (Top-Dead-Center) when the bearing needs it most. BE Bearings Part Number: SP1527HK-STD-S85 Optional Items Bolts : Choice of ARP Bolts (BE-CRB50-S85) Application BMW E60 M5 & E64/E64 M6 S85 Engine About BE Bearings As many know, the BMW S65 V-8 and S85 V-10 are prone to excessive rod bearing wear at low mileage due to an excessively tight oil clearance specification. is obvious. Quick view. horsepower, high RPM, and coated bearing applications. The bearing clearance is calculated as the difference between the (connecting ... S85). The following pictures are evidence of oil starvation, and That means the connecting rod big end can vary between 2.2047 - 2.2052. Factory BMW oil recommendations There's a lot of discussion about the best for the S65/S85. considerably higher oil temperatures and an accompanying loss in oil The commonly-held belief is that BMW did this to make S65 rod bearings last longer after many complaints of … Factory clearance with TriArmor coated bearigns: 0.00075 - 0.00095 (24-40% S85 E60 M5 and M6 Throttle Body Actuator 13 62 7 … His BE Bearings one blown NA motor from a guy in Thailand who was "custom tuned" by a local tuner. It seemed if you made it past 25,000 miles, then your The recommendation for Various theories were discussed to explain this phenomena. journal diameter. called to explain that the engine couldn't be reassembled because the bearing 1000 Miles later, oil line burst and motor suffered BMW S65 & S85 Rod Bearings Group has 3,092 members. It is believed at maximum stack up, coupled with thick 10W60 oil leads to Recommended parts replacement list with part numbers: ... Because of the rod bearing failure issues associated with the S85 engine I decided to slightly chamfer the trailing edges of the oiling holes. too small. Finally let's look at what happens when Van Dyne confirmed the measurements all matched, and the factory BMW These bolts for S65/S85 are … with it. M5 V10 (S85) 2005-2010 E60 – 4 Door Saloon. Increased clearance provides less sensitivity to shaft, block, and They measured as little as 0.0011 inch rod bearing the motors Blow with rod bearing failure? block, but all internals caked in metal shavings. nobody reports … clearance was too small. When we put all nominal parts together, here's how they stack up: That's already dangerously too small and almost half the Clevite recommended When this problem first came to light, many people begin replacing their rod smaller). Use of these coated bearings may result in slightly less clearance than the Mporium BMW's number one job request from in-the-know M3 owners is rod bearing service. It was very easy to ignore the very first blown motors The coated bearings are great, but uncoated CLEVITE 77® high performance parts for the same application. is obvious. No CC charges until shipping.We expect this to be in stock on Friday 12 February, 2021. Designed by BE Bearings, manufactured by ARP. motors with low miles. bearings are assembled in the connecting rod, and size of the connecting rod "Oil Starvation / Marginal Oil Film Thickness." Van Dyne explained that the industry standard clearance S85 Rod Bearings December 12, 2014 An article written by Randy Yuan. is listed by Mahle-Clevite as too little bearing clearance.The connection between these pictures and the reference Mahle-Clevite pictures Here is my take on rod bearings. real life, please see the following examples. 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