S85 rebuild, Feb 5, 2014 · Trying to rebuild an S85, requires cylinder honing by a machine because the cylinders taper like hell at around 60k (not honing by hand). All said and done, the typical rebuild costs me $6,000 to have this done in parts and machining. Ready to take your build further? Contact KingTec Racing for Custom Builds or S85 Rebuild Advice! The BMW S85 is a naturally aspirated 5. Partee Racing specialized in S85 engine rebuilds. . I'm going for a level of simplicity on the engine reminiscent of the F1 V10 glory days. In response, CarBahn Autoworks has developed improved bearings and valve springs. The engine will power a BMW weighing ~3000 lbs. In response, CarBahn Autoworks has developed Jun 11, 2025 · With KingTec Racing’s S85 forged pistons, forged connecting rods, and expert support, you can overcome classic BMW S85 issues, push past stock limitations, and experience the full magic of that F1-inspired V10. Connecting rod bearing and valve springs are common failure items on S65 and S85 engines. We take BMW’s legendary V10 and completely rebuild it to better than stock specifications. This engine includes replacement of the OEM rod bearings with high performance bearings, CarBahn Autoworks valve springs, 2mm over-sized 94mm CarBahn-CP forged pistons and head gaskets. How To Rebuild BMW S85 V10 Cylinder Heads (V10 M3 Build) YEVS BUILDS • 6. 0L V10 with individual throttle bodies, a high 12:1 compression ratio, and Formula 1-inspired architecture. 6K views • 5 years ago Project M Motors Stock Rebuild Complete engine dismantle and inspection All components are thoroughly cleaned All rods & pistons inspected and bearing clearances checked Oil pump is rebuilt and tested Components replaced; head gasket, head bolts, rod bearings, main bearings, piston rings, chain, guide, tensioner, valve cover gasket, oil pan gasket Block is honed Valve job with new valve Unlock your BMW’s S85 engine potential with CarBahn’s premium parts. Apr 27, 2016 · Hey M5Board! I'm looking for advice from those of you with actual experience in building/rebuilding S85 V10s. New vanos pump, oil pump, vanos units on cylidners, cam caps, head gaskets, main bearings, front/rear seal, etc. S85 Rebuild kit fits Commercial / Parker S85 Series Single Acting Telescopic Cylinders. Locked cams, forged internals, 9000 RPM redline Jan 12, 2023 · Peace upon everyone. Any reliable company to rebuild an S85 V10 Engine? 1 cylinder is slightly damaged due to fuel injector malfunction which operated on 100% capacity while the vehicle was turned on for warming up on idle, flooded the cylinder with fuel and damaged the piston rings which Apr 13, 2017 · My Garage rebuild S85 Jump to Latest 23K views 35 replies 13 participants last post by P-Chi Nov 14, 2020 kutila Discussion starter BMW's S85 V10 is the most powerful naturally aspirated BMW engine ever, making over 500hp! This comes as a cost as these can be extremely expensive to maintain properly. Our upgrades boost power, improve handling, & ensure reliability for ultimate driving enjoyment. This rebuild includes a valve job with new hydraulic lifters, plus timing chains, timing chain guides, timing chain tensioners and all associated seals and gaskets. However, factory rod bearing clearance issues, aging VANOS systems, and extreme heat cycling make these engines prime candidates for a full race-spec rebuild.


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