Fred's 2374 -> 2258 Engine Build Thread Options

[Shivers]

Nice parts Fred

[zig-n-zag]

A tip I got long ago was to always store engine cases bolted together to

prevent warping. Check the camshaft saddle under the #2 bearing to see

if it had collapsed or rocks using a straight edge. Run the straight edge

horizontally over all 3 cam saddles, on both sides of the saddles, and

vertically over the #2 main bearing saddle, and out to the case perimeters.

A problem there might mean a cam tunnel line bore. And there’s 1 more

check to do. Bolt the case together with the 6 big nuts and torque it to

25lbs. Back light the center main at the parting face. If you see any light

between the parting faces, that means you’ll have low oil pressure,

because oil will be leaking out from the back side of the bearing.

[friethmiller]

A tip I got long ago was to always store engine cases bolted together to

prevent warping. Check the camshaft saddle under the #2 bearing to see

if it had collapsed or rocks using a straight edge. Run the straight edge

horizontally over all 3 cam saddles, on both sides of the saddles, and

vertically over the #2 main bearing saddle, and out to the case perimeters.

A problem there might mean a cam tunnel line bore. And there’s 1 more

check to do. Bolt the case together with the 6 big nuts and torque it to

25lbs. Back light the center main at the parting face. If you see any light

between the parting faces, that means you’ll have low oil pressure,

because oil will be leaking out from the back side of the bearing.

Will do! It's together with the case bolts torqued at the moment. I'll start with the backlighting one first. Thanks!

UPDATE: It all looks fine. Everything checks flat and no light can be seen between any of the saddle parting lines.

[friethmiller]

To summarize my current issue, I'm measuring my W case with a 0.020 bore at 0.022 - 0.023. I have a new 2-3" micrometer coming in tomorrow. If the results are the same, I'm sending out the EA block to get fixed or sourcing another case. (IMG:style_emoticons/default/headbang.gif)

So, until I'm satisfied with the case measurements, I'm NOT proceeding. Doing so is a fool's errand.

[Nogoodwithusernames]

To summarize my current issue, I'm measuring my W case with a 0.020 bore at 0.022 - 0.023. I have a new 2-3" micrometer coming in tomorrow. If the results are the same, I'm sending out the EA block to get fixed or sourcing another case. (IMG:style_emoticons/default/headbang.gif)

So, until I'm satisfied with the case measurements, I'm NOT proceeding. Doing so is a fool's errand.

Have you checked it with bearings installed? With the variation in new bearings maybe you got lucky and have some bearings that are on the large size and will work with the case. I've heard of guys ordering multiple sets of bearings to get a fit they like.

[friethmiller]

Have you checked it with bearings installed? With the variation in new bearings maybe you got lucky and have some bearings that are on the large size and will work with the case. I've heard of guys ordering multiple sets of bearings to get a fit they like.

Thanks @Nogoodwithusernames

Interesting... my second set of bearings just showed up today. (IMG:style_emoticons/default/idea.gif)

[friethmiller]

Wanted to verify the oil clearance on the mains. AI says:

0.03 mm to 0.08 mm (0.001" to 0.003") for journals #1, #2, and #3
0.05 mm to 0.10 mm (0.0019" to 0.004") on journal #4

Does this sound correct or is this AI screwing up and giving me Type 1 specs? I think .002 is desired, if I'm remembering correctly. TIA.

[930cabman]

Wanted to verify the oil clearance on the mains. AI says:

0.03 mm to 0.08 mm (0.001" to 0.003") for journals #1, #2, and #3
0.05 mm to 0.10 mm (0.0019" to 0.004") on journal #4

Does this sound correct or is this AI screwing up and giving me Type 1 specs? I think .002 is desired, if I'm remembering correctly. TIA.

Those clearances look good to me, have you installed the crank/bearings with a bit of oil, torqued the case bolts and see how she spins?

[friethmiller]

Not yet. I’m asking if these are the recommended clearances. I’m about to start measuring crank to bearing clearances. I will be mic’ing the main journal, zeroing the dimension to my bore gauge, and then measuring the clearance with the bearings mounted/torqued in the case.