Main Bearing Caps

[bmck]

I am assembling a 1500 and am a little confused about the marking on the main bearing caps.

Before I disassembled, I took a few photos of how the caps were arranged. Here's one showing the no-notch cap at the flywheel end with the 4-notch cap next in line...

The 1-notch cap was at the timing belt end.

I note that this arrangement is the same as in the first photo in Ricardo's post here...

http://xwebforums.com/forum/index.php?posts/88780/

I reassembled the engine in the same way - 0-notch at flywheel, followed by 4, 3, 2, 1 at timing belt.

I have now read in the on line shop manual - "Cap without notch is at timing gear end of crankcase, then cap with one ntoch, etc"

(http://www.midwesternmedicalmachine.com/~damonfg/X_FSM/PDF_Files/X1-9_10_100-00_10-30.pdf)

I am concenrned this difference may be significant as the caps are slightly different widths. I have the wider no-notch cap covering the thrust bearings.

(Given this whole rebuild saga was the result of thrust bearing naughtiness in my old engine, I do not want to annoy the cranksaft Gods by having anything to do with thrust bearings less than 100% correct)

Any suggestions?

Brian

 

[Rupunzell]

Non marked main cap is towards the flywheel end. It is main cap# 5.

The caps are line bored when the engine is made, mixing them up will cause serious problems.


Bernice

 

[bmck]

Thanks Bernice.

So the description in the shop manual at http://www.midwesternmedicalmachine.com/~damonfg/X_FSM/PDF_Files/X1-9_10_100-00_10-30.pdf is incorrect.

I also note that the 3-notch cap is wider that its neighbours (carrying wider bearing shells), so couldn't go in any spot other than between pots 2 and 3.

Regards,

Brian