Kohler — Bleeding Hydraulic Lifters
Repair & overhaul · Cylinder Head
From a Kohler service manual covering: CV17, CV18, CV20, CV22, CV23, CV25, CV620, CV621, CV630, CV640, CV641, CV670…. Check it applies to your exact model before use.
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Before you start
- To prevent a possible bent push rod or broken rocker arm, it is important to bleed any excess oil out of lifters before they are installed.
Procedure
- Cut a 50-75 mm (2-3 in.) piece from end of an old push rod and chuck it in a drill press.
- Lay a rag or shop towel on table of drill press and place lifter, open end up, on towel.
- Lower chucked push rod until it contacts plunger in lifter.
- Slowly pump plunger 2 or 3 times to force oil out of feed hole in side of lifter.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.