BMW 228i Intermittent Misfire Caused By Collapsed Pistons

This BMW 228i was brought into GP Motor Works with an intermittent misfire. Initial inspection indicated the misfire seemed to be switching the injectors off. The compression test showed there was decent compression occurring. However, the leakage test indicated there was blow by past the rings.

The engine was stripped and we discovered one piston was collapsed. We suspect this was caused by overheating at some point. The cylinder sleeves were replaced and new pistons were installed. The new pistons were tested in the block to confirm there were no leaks

BMW 228i Engine Rebuild

Once the head had been reconditioned and returned to our workshop we commenced with the engine rebuild. New timing chain, gaskets, head stretch bolts, new oil and filter, air filter and spark plugs were installed. Once this was complete we commenced with full diagnostic testing. This included ensuring there were no oil leaks, water leaks, as well as no misfires. The diagnostics came up with no identified faults.

BMW 228i Engine Run-in

An engine rebuild of this nature requires careful engine run-in procedures. We carried out the first 200km run-in and then advised the client to continue the process. We advised the car be returned at 1000km’s for a complete oil change.

Don’t hesitate to contact us for any engine issues you identify. 

Remember – if you suspect there is an issue, it is far better to bring your car in to have it checked sooner rather than later – it may just save you as small fortune!