¶ MMHP Knowledge Base
Schematic. The oil pump is where the oil circuit this wiki is about begins.
MMHP has been developing and manufacturing products for the automotive industry for 25 years. Our focus: the oil supply of VW TDI engines, whose design weaknesses we have been researching for over a decade and addressing with our own conversion systems. More than 60,000 customers drive with our solutions.
This wiki is where we lay our knowledge open. On the homepage we present the company and our products, and in the shop you can buy them. Here, it's about what lies behind all that: how the failure patterns develop, how to properly measure and assess oil supply, and how we work. Anyone who understands what's happening inside their engine makes better decisions. That's exactly why we write these pages.
¶ The knowledge section
All articles are freely accessible and grouped by the same topics as the menu. Each topic shows up to three articles here, and you will find the rest on the topic's overview page.
¶ Engines in focus
If a particular engine is what brought you here:
- 2.0 TDI Balancer Shaft Module (EA189): the Weak Point
- VW CFCA Engine Problems: Why the T5 2.0 BiTDI Dies of Oil
Topic overview: Engines in focus →
¶ Oil pump and oil supply
How the oil gets to the bearings, and what stops it on the way:
- Understanding the Oil Pump: Function, Limits, Weak Points
- Oil Pump Stage 1 or Stage 2? Why More Is Always Better
- Oil Pressure Light On? What It Means and What It Doesn't
All 7 articles on oil pump and oil supply →
¶ Measuring oil pressure
This is where it gets interesting, because almost everything circulating on this topic doesn't hold up to scrutiny:
- Measuring Oil Pressure: Why Your Gauge Lies to You
- Oil Pressure Measuring Point: Why One Reading Deceives
- Oil Pressure in Bar: Why We Don't Promise Absolute Figures
All 6 articles on measuring oil pressure →
¶ Oil and lubrication
What the oil does, what destroys it, and the legends that surround it:
- Oil Myths Fact-Checked: Thicker Oil, Additives, Flushes
- Diesel Oil Dilution: How to Spot Fuel in Your Engine Oil
- Which Oil for the 2.0 TDI? Approval Beats Brand
All 6 articles on oil and lubrication →
¶ Timing drive
Chain, tensioner, rails, and what the oil has to do with it:
- Timing Chain: How It Works, Symptoms and When to Replace
- Timing Chain Rattle on Cold Start: Tensioner or Cam Phaser?
- Timing Chain Kit Quality: What the Box Won't Tell You
All 6 articles on timing drive →
¶ How we work
A look behind the scenes, from the dismantled engine to the question of which engines we take on:
- Research at MMHP: Buying, Dissecting, Measuring Engines
- Manufacturing Tolerances: Every Engine Is One of a Kind
- Why MMHP Deliberately Doesn't Offer Most Engines
¶ Reference
¶ The eGuides
For our conversion systems and products, there are detailed installation guides, the eGuides. They come with the product: when you purchase, you receive individual access credentials by email and, after logging in, see exactly the guides that belong to your purchase.
The eGuides are deliberately not public. They contain the complete, illustrated step-by-step documentation that comes from our development work and is refined further with every product generation.
Problems with access or login? Our support team is happy to help.
¶ What we're working on right now
The knowledge section keeps growing. The topics emerge where the most questions come up in everyday work: in our development work and in exchanges with our customers. If you're missing a topic, write to us via support — the best articles so far have come from exactly these kinds of questions.