You can't measure a split bearing like that. When it's not in the case it will be oval – wide at the split, narrow top to bottom. It should be a snug fit pushing into each case half and the split should be just slightly proud of the case - flush with your fingers. Assemble the case with just that bearing fitted and nothing else, torque the split line bolts – are the case halves tight together? If not the bearing is oversize, if yes it is correct. Or too small. It will be obvious if the new bearings are correct or not but you won't be able to measure them accurately enough with the tools you have.
When the case was together with the crank and cam etc, there was no gap, it ran sweet as a nut after its stationary cam break in, no thumping, no trying to shake itself out of the engine bay and with no leaks. The issue really, was the swarf I found on top of the strainer, not in it. The new bearings I have ordered, are the same as these, but won’t be buggered up and pitted as this time, the engines interior will be spotless, as opposed to ‘I thought it WAS spotless’, after the Aline alight a loon bore was done. And yes, I probably can’t measure it as well as if I had all the equipment necessary, but I’m doing it as well as I possibly can,with what I have, in the only workspace I own. Honest,Guv.
I mean you could/should check the bearing saddles are tight together, not the outside of the case. You do that by bolting the case together with just the bearings installed and look through the hole where the crank would be, shine a torch from the other end and look for light at the split line. But I don't think the bearings are wrong, judging by the witness marks on the OD and case ID, so you're probably not going to bother to do any of that. Look on the bright side, it could be worse, but at least this guy knows where the debris came from.
Yes. I did check the inside of the case, I probably bothered to do that, the first time,with the main in, at correct torque of the 6 main nuts,over in the guys shop, no light gaps in case under journels. Please, I’m not a complete idiot, just life gets in the way of the lesser important things, like assuming a case would have been prepped and ready for rebuild, once the work has been done and handed back. If anything, I think other people are more confused by this thread, than you and I.
I’ve just read the whole of this thread from start to finish and I can tell you I haven’t got a *****ing scooby what its all about
Just to stick my nose in, not that I have anything constructive to add but I'm feeling left out Going right back to the late 80's, early 90's when I first got into VWs, all my mechanic and engine building mates called it an "align bore" cos it was to align the crank correctly in the case. My mate Rich told me that, and he served his time as an engineering apprentice at Rolls Royce in Filton. I'll get back in my box now.
