You may have seen my previous post about a serious engine knock after the oil pressure warning light came on, after only having a 2.2d sport estate for 2 days.
The engine has now been fully stripped down, and the cause and damage listed. The worst thing about this, is that it has been rejected by the warranty company as a legitimate claim, and luckily I have managed to get a full refund on the car.
I seriously recommend getting your injector seals checked more regulary than mazda suggests.
See the engineers report below.
Customer advised that oil warning light came on then engine started making a loud clanking noise.
Vehicle recovered in.
Investigate engine fault, found engine very loud, checked oil level- level good and no fault codes stored in PCM.
Removed sump pan and oil pump and sandwich plate to inspect crankshaft main bearings.
Removed bearings from connecting rods and found 2 big end bearings and main bearings excessively worn (see pictures)and oil strainer
filled with debris.
Carried out further investagtion to find out cause of big end and main bearings to fail, removed cylinder head and checked all
rockers and cylinder head for cracks, no cracks found. Found number 1 Injector excessively covered in carbon and hard to
remove from cylinder head, and blowing past injector seal causing oil streainer to block resulting in big end and main bearings to
wear and crankshaft to wear. Technician has advised after consulting Mazda technical that short engine needs to be replaced along with
new fuel injector, set of injector seals and leak off pipes, engine gasket set and oil strainer pick up (Balancer unit).