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Knowledge centre
Oil Pan Guides for Buyers and Workshops
Twelve guides covering identification, materials, casting and stamping processes, sealing and sourcing. Four of them were published on the original RUIFAN site in 2009 and are reproduced with their original wording.
Technical and Process Guides
Written for this site. General engineering background, with RUIFAN facts used only where the original site recorded them.
Stamped Steel vs Cast Aluminum Oil Pans
How a drawn steel pan and a cast aluminum sump differ in structure, failure mode and repairability, and what that means when you source a replacement.
How to Read an OE Oil Pan Number
Reading VW-group, Toyota 12101, Honda 11200 and PSA oil pan numbers, and what each segment actually tells you about fitment.
Oil Level Sensor Hole Variants and Why They Matter
Why two pans with almost the same number are not interchangeable when one has an oil level sensor boss and the other does not.
Upper and Lower Two Piece Oil Pans
What an upper pan does that a lower sump does not, and how to avoid ordering the wrong half of a two-piece system.
Die Casting Sand Casting and Gravity Casting for Engine Parts
The three casting methods listed in the RUIFAN process sheet, what each one is good for, and how the choice shows up in the finished part.
Deep and Shallow Draw Stamping for Oil Pans
How a steel pan is drawn, where the metal thins, and why draw depth is the constraint that decides tooling.
Oil Pan Sealing Surface and Gasket Basics
Flange flatness, gasket choice and torque sequence — why most replacement pans that leak were fitted, not made, badly.
Sourcing Replacement Oil Pans for Distribution
A buyer's checklist for adding an oil pan programme: number coverage, identification evidence, packing, and the questions to ask before the first container.
From the Original RUIFAN Website
Published in 2009 on the original site and reproduced here with the original wording quoted in full.
What Is an Oil Pan
What an oil pan is, where it sits on the engine and what it does — the original RUIFAN explainer, kept as it was published in 2009.
What Can Go Wrong With My Oil Pan
Impact damage, worn gaskets and contamination — the three failure modes the original RUIFAN guide identified, with sourcing notes added.
How Will I Know I Have a Bad Oil Pan
How a failing oil pan announces itself, why a dent is usually not an emergency, and when replacement is the right call.
Do They Make Different Oil Pans
Why engine code, sensor-hole configuration and drain-plug position decide fitment, and how to use an OE number properly.
About the Knowledge Centre
Who writes these guides?
They are written by RUIFAN for buyers and workshops. Four were published on the original RUIFAN website in 2009 and are reproduced with their original wording marked as such.
Do the guides cover parts you do not sell?
They cover oil pans, sumps, engine supports and the casting and stamping processes behind them, which is what the catalogue holds. General engineering background is included where it helps a buyer decide.
How often are they updated?
The archived 2009 articles are kept as published, with their original dates. The technical guides are maintained alongside the catalogue.
Can I use these guides in my own catalogue?
Ask first. Send a note saying what you want to use and where, and we will come back to you.
Turn a Question Into a Quote
If a guide left you with a specific reference to source, send it over with the vehicle and quantity.