Re: Superb Mk2 Sud Ti on E Bay
I have owned many suds & sprints over the years and I have to say the big end shells have gone on every single one.
Not sure why but a lot of them do suffer especially earlier ones. I think it could be to do with the use of cheap low quality oil filters with no return valve. Low quality oil, or dodgy oil pump.
I would advise against just replacing the shells, if it knocking it would almost definitely have had an impact on the crank. If it were me i would drop the engine out and strip down the bottom end. Then get the crank reground and fit new shells. Check the oil pump! Its a pretty easy job, and while its out replace the cam belts. If you want to get really excited do the head gaskets as well! Maybe inspect the bores & rings it goes on... Oh probably also a good idea to change the clutch and front brake pads while the engine is out! Check the throttle cable and linkage a this can get a bit stiff and sticky on the single carb engines. Refill with good quality oil and run in carefully. Replace oil after 1000mls!
This always seemed to occur prior to 50K miles, but strangely after i did the repairs it never occurred again even after more than twice the mileage. maybe its down to the way the car is looked after! maybe they made the shells from the same stuff as the body!
But I would agree the boxers weakness was shells & head gaskets - but it's such an easy engine to work on and remove I wouldn't let you put that off. A crank regrind and new bearings wont cost the earth!