Replacing a high pressure oil pump is a job that anyone who maintains diesel engines will ultimately face. While the exact procedure varies a little from one vehicle to the next, here’s a look at the basic steps involved:
- Using a pan or large, shallow container, get ready to catch oil as the pump is disconnected.
- Remove the end plug from the port, using a rag to collect additional oil. Dicard the O ring.
- Remove all attached hoses; a special tool may be needed on some models.
- Pull the discharge fittings from the pump, agains discarding the O riungs.
- Using needle nose pliers, take out the spring and check assemblies.
- Using a commercial brake cleaning product, clean all ports and fittings.
- Remove the old pump and replace with new one. Make sure new gaskets are used. Scrape away any remnants of old ones.
- Reinstall check valve and spring.
- Install new O rings on the fittings.
- For the discharge fittings, apply Loctite thread compound to the frist three threads.
- Reinstall all discharge fittings; torque to spacified amount in manual.
- Re-attach all high-pressure hoses.
- Using a commercial brake cleaner, clean the end plug port. Make sure that the plug is now dry and free of any dirt or particles.
- Place new O ring on the end plag.
- Clean the por thoroughly. All oil must be removed.
- Use Loctite on the first three threads.
- Install the end plug aand torque as specified in the manual.
- Crank the engine, then watch all connections for any possible leaks.
- Check the oil level and correct if needed.
By following these basics steps you’ll find that replacing high-pressure oil pumps can be quick, easy, and hassle-free.