I am finally making progress with the reassembly of the engine.
The crankshaft is in with +10 bearings.
Only now, after over a year I realize that the box of big end bearings never made it out of the machine shop…
I have to reorder a set.
I want to be extra sure I order the right size (it will be either standard or one size over).
How can I determine the size I need? Measure the crankshaft with a caliper or micrometer.
Well, either, so long as it’s a machinist’s tool.
Make sure to check both sides of the journals, 90 degrees apart, around the circumference of the journal.
Great thanks, now I need to find the specs
The Repair Operations Manual shows nothing
It says the specs for the small end are in Engine Data Set 05… but that’s it. Cant find the Engine data Set…
What year engine do you have?..specs are stated in the S2 XJ manual (for example)
I do not have S3 XJ , but do have all earlier FSMs
It is a S2 XJ, # 8L27778-S
Thank you for this Mike, I do not however see here the specs for the big end crankshaft bearing journal.
top photo, top line, - 2.086" is the standard size
This reminds me: when I rebuilt the Rover, due to the crank needing to be ground, my crank guy needed the stock journal dimension: the otherwise excellent factory manual had every other dimension… except for the rod journals!
Took me a looootta hunting to find it.
Ah, I see, it is called… “crankpin”
I love this: “Check the top face of the cylinder block for truth.”
Ditto! I’m STILL looking!
I always wondered why they didn’t just call it 53mm? 2.086" is just such an odd, inefficient way to call out a dimension.
They are all at 2.075", it looks like the shop machined them all to -10.
So thats what I need.