MTU — Crankcase breather – Oil separator replacement, diaphragm check
Maintenance · Crankcase ventilation
From a MTU operator's manual covering: 20 V 4000 G23, 20 V 4000 G43, 20 V 4000 G63, 20 V 4000 G83, 20V 4000 G63L, 20V 4000 G83L. Check it applies to your exact model before use.
Applies to: MTU 20 V 4000 G83, MTU 20 V 4000 G23 engine, MTU 20 V 4000 G43 engine, MTU 20 V 4000 G63 engine, MTU 20V 4000 G63L engine, MTU 20V 4000 G83 engine, MTU 20V 4000 G83L engine
Before you start
- Hot oil: wear protective clothing, gloves, goggles; avoid skin contact and inhalation.
Procedure
- Remove cover with O-ring.
- Remove filter element from housing.
- Insert new filter element in housing.
- Fit cover with new O-ring.
- Tighten cover screws to 10 Nm -2 Nm.
- For diaphragm: remove cover, take off spring, seal and diaphragm.
- Check diaphragm for damage, fit new if damaged.
- Mount diaphragm, install new seal and spring with cover.
- Tighten cover screws to 10 Nm -2 Nm.
Tools required
- Torque wrench 6-50 Nm F30027336 Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Cover screws 10 Nm -2 Nm
Source: MTU operator's 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.