K-321 rebuild/reassembly help needed.

[rickx]

Thanks Brian,
Do you make your own tool out of a water pipe?

[bocephus1991]

If you haven't installed many oil seals before prob be a good idea to use a piece of PVC pipe or something similar. I"ve used a brass punch or regular large flat flat punch.

[dvogtvpe]

seals are about the last thing I put in the motor. I just freehand them in with a hammer

[rickx]

Thanks Guys!
PVC pipe sounds good! Not sure I trust myself with a hammer next to the crankshaft.

[J-Mech]

Originally Posted by dvogtvpe

seals are about the last thing I put in the motor. I just freehand them in with a hammer

That's how I do it too....

[rickx]

Got the block back from the machine shop and all looks well. I should be reassembling it soon. Three questions.
The Kohler engine manual says to torque the rod nuts(cap screws) to 20% over nominal value (260 in./pounds aftermarket rod), loosen and retorque to nominal value. Is this the correct procedure for the aftermarket rods?

The aftermarket piston I received has a 3-piece oil ring, 2 scrapers and a separator. Do I end gap these thin scrapers same as compression rings?

With the Kohler solid cast iron oil ring, the ring end gaps are spaced at 120degrees around the piston. How do you space the end gaps with 4 rings, (2 oil scrapers and 2 compression rings)?
Thanks for the help!
Rick

[dvogtvpe]

did you get instructions with the rod ? if not what kind of hardware holds your rod cap on? yes it makes a difference

space the compression rings 180 and the oil rings 180, the oil ring gaps can line up with the compression rings since one is oil control and the tops compression. put your expander 90 to your oil gaps. it explains all this in the manual.

[rickx]

Thanks DV,
The note included with the rod just says 260 inch pounds torque. no info. on procedure.
Sounds good on the ring gaps!
Thanks,
rick

[rickx]

Three piece aftermarket oil ring question. Has anyone had to trim the separator ring to allow the scraper rings to collapse enough to fit into the bore?
The separator ring has shoulders on each side that keep each oil scraper from touching the piston. Unless I trim/shorten the separator ring, the scrapers will not collapse to the .010+ end gap I adjusted them to.
1st pic.: shoulders on separator ring ( both sides are the same)
2nd pic.: oil scraper ring fully expanded and still not large enough (I.D.) to fit over shoulders around entire separator ring.
Sorry for the crappy pictures.
Thanks,
Rick

[austin8214]

Have you tried installing them on the piston?