Engine Overview and Common Failures
The weight of the VAZ 11186 engine according to the catalog is 112 kg. Engine knocking. The most common problem with this engine is knocking and noises under the hood. In most cases, the culprit here is the valve clearances that have not been adjusted. But if not, it is most likely piston knock, connecting rod bearings, or crankshaft main bearings. Then you can expect a serious and quite expensive repair in the near future. Fluctuating RPMs. The electronic throttle control system E-gas often malfunctions in this engine, specifically its sensors. This usually manifests as fluctuating engine RPMs at idle. Critical breakdowns. The unreliable pump and tensioner pulley, in case of seizure, can strip the teeth of the timing belt. Until 2018, this was fatal for the engine, but then non-contact pistons began to be installed. Electrical problems. The standard electronic control unit Itelma 11186 1411020 22 is quite unreliable, so it is one of the most common parts to order from online stores. Misfiring. One of the valves is often burned out (don't forget about adjustment). However, if the compression in the cylinders is normal, the cause is usually the ignition coil. Stalling. Due to a malfunctioning DMRV, your car may stall while driving. Overheating. The thermostat regularly fails, causing the engine to stop warming up properly. Minor issues. Among the minor problems, we can include frequent oil leaks, especially from under the valve cover.