FAQ’s
Q: Why do I have low oil pressure?
A: This is commonly caused by increased clearances within the engine, i.e., worn engine. It could also be caused by low oil levels and by the oil pump ingesting air, or because the by-pass valve is not functioning properly.
Q: Why do I have high oil pressure?
A: Can be caused by using the wrong viscosity (thickness) of motor oil in your engine, or because the by-pass valve is not functioning properly. Another common cause is tight engine clearances, i.e., new engine. Refer to your owner’s manual for the correct viscosity of oil for the climate conditions you drive in.
Q: Can I adjust or change the oil pressure?
A: Only the by-pass pressure can be changed by changing the by-pass spring, not the idle pressure. Some of our Melling Select Performance oil pumps offer spring options.
Q: How far from the bottom of the pan should my screen be?
A: Oil pump pick-up screens need to be 3/8” to ½” from the bottom of the pan.
Also see “Why replace oil pump screens?”
Q: How should I break in my camshaft?
A: Start the engine, after it starts, check for oil pressure and bring the RPM to 1500-2000. If the pressure is good, run the engine at this RPM range for 20 minutes. After this run in period, final adjustments can be made and the engine put in service.
See “Recommended Break in Procedures”
Q: Is it better to replace only the timing chain and sprockets or should all the timing components, such as tensioners, guides pulleys, etc., be replaced?
A: If a complete set is offered for your engine application, it is strongly recommended to use the complete set.
Q: Will a hi-volume oil pump eliminate my low oil pressure?
A: No, a hi-volume oil pump is not a band-aid.
Q: Why does my oil pressure drop at high RPM’s?
A: The oil pump screen could be sucking air or oil is not returning to the pan properly. Every situation is different, because every engine, and every engine builder, is different. These are some of the more common occurrences we experience.
Q: What Melling Select Performance camshaft should I use for my performance engine?
A: Please see “Camshaft specifications”
Q: Where can I get Cylinder Sleeves and/or technical information on Cylinder Sleeves?
A: Call 800-621-0169, extension 40
Q: What oil pump & screen do I use for a 460 Ford (1974-1997) with a rear-sump pan?
A: Oil pump – M-84D (Stock Volume) M-84DHV (Hi-Volume)
Oil pump screen – 84-DS1 (Short) 84-DS2 (Long)
High Volume Pumps (pdf)
Pressure vs. Flow (pdf)
Priming Remanufactured Engines (pdf)
Why Replace Oil Pump Screens (pdf)
Camshaft Break-in Procedure (pdf)
Which Melling Select Performance Camshaft Do I Use? (pdf)
Marine Engines-Standard & Reverse Rotation (pdf)
Camshaft Specifications - Engine Parts (pdf) |
