You'll notice a decent improvement in low-end torque, and your gas mileage may improve slightly. +1. Basically, any E46 with more than 70K miles should probably get the VANOS repair. By that point in things, you'll almost always notice much smoother shifting etc. a week or so after the replacement.
C. Cbatoday Discussion starter. 437 posts · Joined 2017. #1 · Apr 30, 2017. When rebuilding after replacing the timing chain do the 2 vanos gears on the end of the camshafts have to be positioned on the camshafts in a certain position as there are no keyways for them. Also is there any identication to tell if they are ok or failed.Your first screen shot shows the problems. Solution: Replace the camshaft position sensor (Bank 1), and the thermostat -actually the elctronic parts of the tstat-. As to the last 7 disits of the VIN, they can be used to get the exact original configuration of the car as to engine, options, partsetc.. 🚗E39🚙.
http://www.euroautotraining.comHere's Chapter 1 of our comprehensive eleven Chapter Single VANOS Service video, developed and presented by Angelo Campana. In
The M52 was an upgrade to the successful M50 engine. The M52 was produced in 2.0 (M52B20), 2.5 liter (M52B25) and 2.8 liter (M52B28) configurations. When the BMW E46 3 Series was launched in 1999, the M52TU engine was introduced in the E46 323i, E46 328i and the E39 528i models. The major changes in this Technical Update were the redesigned VANOS allows for two things. Ability to meet emissions and ability to run cams for peak power but maintain smooth idle. On stock setup, you won't encounter valve interference nor piston to valve clearance issues. But tuning it incorrectly could reduce power or torque depending on what you do. VANOS (or VAN0S) is BMW’s variable valve timing system. The VANOS unit is basically a pump and solenoid that rotates the camshaft to make more torque at various RPM. Having a variable camshaft means the M3 S54 engine can make a lot of power in the high RPM without feeling too sluggish in the lower RPM.In simpler terms, it adjusts the camshaft for the intake and exhaust valves, allowing for smoother idling, more torque, and a more elastic powerband. In addition to this, the vanos solenoids control the flow of oil to the cam gears, which is what allows the timing to adjust.
The BMW Service Tech had seen firing and VANOS errors and was just hoping that if he changed enough items it would fix the problem. It didn't. When I got back and diagnosed it as a torn o/s membrane requiring a new valve cover (integrated o/s) and valvetronic sensor (PM item when cover is removed/replaced on N52) her bill for this needless work
how does bmw vanos work
