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Neil BrowningOct 31, 2025
What to do if Kohler Engine has incorrect vacuum in crankcase?
- TTammy WallaceOct 31, 2025
If your Kohler Engine has incorrect vacuum in the crankcase, several issues could be the cause. First, the crankcase breather might be clogged or not working properly; in this case, disassemble the breather, clean all parts thoroughly, reassemble it, and then recheck the pressure. Second, seals and/or gaskets might be leaking, or fasteners might be loose or not properly torqued; replace any worn or damaged seals and gaskets, and make sure all fasteners are securely tightened, using the correct torque values and sequences if needed. Third, there could be piston blowby or leaky valves, which you can confirm with a cylinder leakdown test; if so, recondition the piston, rings, cylinder bore, valves, and valve guides. Finally, a restricted exhaust could be the problem; repair or replace the res...
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