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Wondering if the pros could give opinions on these journals and surfaces. Mower was hammering like a rod knocking while running and cutting fine. Turned out to be a cam in two pieces. Can't believe it actually ran and cut. This second cam (used) lasted about 5 seasons. First cam was replaced due to compression relief failure.

Replacement push rod for this engine (12 411 04-S) does not have hole in center?

That is the correct part number and no, it doesn't appear to have a hole in the center.. Did your old ones have one?

Boy I am slipping as I thought I posted the following.

Image of PN 12 411 04-S they don't.

Scrubcadet10 said:

That is the correct part number and no, it doesn't appear to have a hole in the center.. Did your old ones have one?

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Yes; old rods did have the hole.

Polished all the rotating surfaces today and they look much better now. I think I will use full synthetic in this old mower upon reassembly since "she" has made it this far (24 years).

Any chance someone on here has the cam end play tool and could scan so I can 3d print the tool?

You should able to make the tool without the scan. Here is what it looks like. Basically it is just a flat piece on metal with a hole for the camshaft and three mounting holes.

Thanks. Realized I can make a template from the bottom of the crankcase.

EDIT: Attached is a redesigned 3D printable variant of the KO1031 endplay tool, which should be OK for my lawnmowers. I don't suggest this alternate tool if your mower is rocket propelled.

Anyone have a part number for the rod bolts (6mm straight shank)? CV15S-41567 Diagram is showing rod bolts only with piston-rod kit.

Kohler does NOT offer the rod bolts [screws] separately. You must purchase the rod in order to get them from Kohler.

Can't seem to find them used either. Any suggestions on sourcing a couple?

what do you need new rod bolts for?

Scrubcadet10 said:

what do you need new rod bolts for?

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One snapped where threads ended and shank meet at 100 in. lb.

Rod bolts are M6 (size)-1.0(pitch)x50mm(length of shank and thread combined) grade 10.9.

Check at BoltDepot

You can the Flange head on Amazon. but you need to buy 12 ea of them which is still a lot cheaper than the rod assy.

New lifters won't seem to stop pecking. Let it idle for about 3 minutes and still pecking. This normal? Reassembly states do not pump lifters up before installation. New pushrods do not have the hole like the old ones I replaced. Thinking of putting old pushrods with hole back in. non-adjustable rockers torqued to 100in. lb. Any suggestions?

what oil are you using? I had a Kohler cv15 that would tick, I think Quaker state 10w30 was used, I switched to Kohler's 10w30 and it stopped after about 20+ minutes of run time..

Scrubcadet10 said:

what oil are you using?

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Pennzoil 5w30 full synthetic. Maybe I will give it some more time at low RPMs. Manual states 90 seconds.

Let it idle for about 25-30 minutes minutes...finally stopped ticking.

glad to hear it! thanks for letting us know