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Unread 07-11-2018, 11:54 AM   #2281
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The flywheel is mounted to the crank with 6 bolts. Luckily I've taken pics and video all along the way. This is a pic of the end of the crankshaft while at the local Chevy dealership showing how the pilot bearing was bored into by that oversized Pfadt driveshaft.
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Unread 07-11-2018, 11:57 AM   #2282
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BTW, the above pic shows why techs should NOT use the hydraulic pressure method of removing the pilot bearing on LS engines. See that plug behind the pilot bearing? There is a good chance that would get pushed into the engine before the pilot bearing would be pushed out. Then you've REALLY got a mess to deal with.
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Unread 07-11-2018, 05:37 PM   #2283
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The flywheel will have to be pretty close to the one already in there, at least
in terms of pilot bearing diameter, and depth, or you're liable to need a new
torque tube (to match up with the new flywheel) as well !
Andy
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Unread 07-11-2018, 06:33 PM   #2284
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From what I can see, the LS6 and LS7 flywheels both have 6 bolt holes for mounting to the crankshaft. However, it appears that the LS6 flywheel is uniformly flat across the surface facing the pressure plate, but for the LS7 pressure plate the bearing surface is recessed. Regardless, I will have both flywheel replaced along with the clutch. For one thing, a resurfaced used flywheel was put in there, and from what I understand the GM service manual specifically states to DO NOT resurface the flywheel for reuse.

As for a possible torque tube issue, the torque tube mounts to the bell housing. It appears to me that the end of the crankshaft will take both the smaller LS6 style pilot bearing or the larger LS7 style bearing. As I mentioned that implies to me that the input shaft to the torque tube must be different in the LS6 and LS7 powered vettes. It would have to be shorter in the LS7 in order to use that larger pilot bearing.

If you look at the pic I posted above, you can see where that larger LS7 style bearing would be pressed into the end of the crankshaft.

Here's a video of someone removing an LS3 pilot bearing, which appears to be that same larger style bearing.



https://www.youtube.com/watch?v=c0ZAnN_OqiI

Now, honestly, exactly what years and which exact vehicles used one type of bearing or the other, I really don't know. But I'm guessing putting the wrong style pilot bearing in could cause you a bunch of headaches.
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Unread 07-15-2018, 02:41 AM   #2285
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Default 7 Things You Should Know About the RHS LS Block

Well, it certainly looks like the RHS block in my engine is a quality piece of equipment.




https://www.youtube.com/watch?v=8RXVo03kYdM

It sure looks a lot better done than that original World Products Warhawk block I got.



https://www.youtube.com/watch?v=KbBdXf9lwZI

All I can say is that I certainly was NOT impressed with the Warhawk engine I got and ultimately rejected.
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