The most common engine rattling at idle isn’t an engine problem at all. Disengaged, i.e. If you rev to 1500 RPM, it more or less goes. If you're experiencing the dreaded VANOS rattle or if you just need regular service for your vehicle, get in touch with Chris' Car Care. else y - overFlowY : y; function msg(message) if ( display == true ) VANOS consists of a camshaft gear that operates independently of the intake cam, a splined shaft that slots into the cam gear and a solenoid that controls oil flow to the VANOS shaft. Save … rattle, fast ticking noise at +/- 3800 rpm when decelerating When pulling up in 2nd or 3th to 4000 rpm and then - BMW R 1200 GS question 92 is 16 valve with Motronic control system, your 86 is a 2 valve per cylinder with LE Jetronic control system. } 2 : start; } if (document.body.firstChild != originalFirstChild) As a result, there are plenty of ways for the VANOS system to wear out and make noise. It just wont happen with a four cylinder. As you can imagine, the VANOS hardware gets a vigorous workout throughout its life. A typical VANOS rattle usually sounds like a bunch of marbles rattling around in a plastic bucket. } the clutch is not slipping. Many auto shops advertise their services for vehicles of any make. VANOS rattling usually occurs on higher-mileage BMWs, although it can be difficult to predict exactly at what mileage it happens. Newt Newt Members; 88 posts; Joined May 2004 Posted August 2, 2015. This knowledge will also help you easily identify the common problems when your vehicle isn't running properly. A noisy VANOS may drive you up the wall while driving, but it won't result in poor performance or engine damage, in most cases. Of all cars on the market, only 18% of models purchased are considered of luxury making, which means the car you drive is unique in design and appeal. Could the increase in engine load be exposing the weakness in my timing chain tensioner? = 1000; Oh boy. Sadly it can be heard with the drive belt off. Yet these additives cannot always control fuel varnish. Jump to Latest Follow 1 - 2 of 2 Posts. 0, hard to start in cold, hesitates, stumble, rough idle, until push acelerator at 2000rpm for like half - Answered by a verified BMW Mechanic Bmw x5 e70 rough idle at cold start Bmw x5 e70 rough idle at cold start Most times the driver will note loss of drivability, (engine torque and horsepower), rough idle and hard starts or stalling when cold. start = (start > 2) ? Do not attempt to make any auto repairs yourself; rather, visit your specialty auto mechanic if you believe your car is leaking fluids. O ... A forum community dedicated to BMW R 1200 GS motorcycle owners and enthusiasts. Learn three key things about engine sludge. { The catalytic converter is an emissions control component in your exhaust system. Hello, everyone. DTC codes and a loss in low end torque. Please login or register, » Technical, repair and troubleshooting » Engine and transmission » Rattle at Idle, //