Oil pan and crankcase cover gasket with O-ring for Kohler vertical shaft twin-cylinder engines. Replaces Kohler 24-041-66-S. SUPERSESSION. 24-041-66-S replaces the earlier 24-041-24-S and 24-041-54-S. If your parts diagram shows either of those, this is the current part. FITS. CV18, CV20, CV23, CV25, CV26, CV620, CV640, CV680, CV682, CV730, CV732, and the ECV and PCV equivalents. FIRST - DOES YOUR ENGINE TAKE A GASKET? This is the question your engine's spec number answers, and it is worth asking before you order. Kohler sealed this joint two different ways across these families. Some engines use a die-cut gasket. Others were assembled with RTV silicone sealant and no gasket at all - the service manuals for several of these families say exactly that. How to tell: look your model and spec number up in the Kohler parts lookup and see whether a gasket is listed. Or, if the engine is already apart, look at the flange - cured silicone on a bare machined face means it was built without a gasket. WHY YOU SHOULD NOT SUBSTITUTE ONE FOR THE OTHER. This joint is part of the crankshaft end play stack. A gasket is thicker than a film of sealant, and end play is a measured specification on these engines. Fit what the spec number calls for. TORQUE. 216 inch pounds, 24.4 Nm, in the numbered sequence shown in your engine manual - not around the circle. Clean both faces with a gasket-removing solvent rather than scraping them; a gouged sealing face leaks whatever you put between it. WHILE THE PAN IS OFF Crankshaft oil seal Oil pick-up O-ring Oil pump O-ring and pump screen O-ring Check crankshaft end play with the pan drawn down before final assembly A note on branding: Kohler Engines now trades as Rehlko, so packaging may carry either name.
- FITS THE VERTICAL SHAFT KOHLER TWINS - CV18, CV20, CV23, CV25, CV26, CV620, CV640, CV680, CV682, CV730 and CV732, plus the ECV and PCV equivalents. Replaces Kohler 24-041-66-S, which supersedes 24-041-24-S and 24-041-54-S. Supplied with the oil pick-up O-ring.
- CHECK WHETHER YOUR ENGINE USES A GASKET AT ALL - Kohler sealed this joint two different ways. Some engines take a die-cut gasket; others were assembled with RTV silicone and no gasket. The service manuals for several of these families say plainly that RTV is used in place of a gasket. Look your model and spec number up before ordering, or look at the joint on teardown - cured silicone on a bare machined flange means no gasket.
- WHY IT MATTERS MORE THAN IT LOOKS - That joint carries part of the crankshaft end play stack. Adding a gasket where the factory used a thin film of sealant changes the standoff, and end play is a measured specification on these engines. Use what your spec number calls for rather than what is easiest to buy.
- TORQUE IS 216 INCH POUNDS - 24.4 Newton meters, in the numbered sequence in your engine manual rather than working around the circle. Clean both faces properly first. Kohler asks for a gasket-removing solvent rather than scraping, because a gouged sealing face will leak no matter what you put between it.
- WHAT ELSE COMES OFF WITH THE PAN - The crankshaft oil seal, the oil pick-up O-ring, the oil pump O-ring and the pump screen O-ring are all disturbed by this job and are all cheap. Check crankshaft end play with the pan drawn down before final assembly. Kohler engines are branded Rehlko now, so packaging may carry either name.