ML320 Oil Level Sensor Replacement


We are thoroughly enjoying the second OM642-powered machine we’ve owned, my wife’s 2008 ML320 CDI. Like my 2007 R320 CDI, this one had the notorious oil cooler leak and received efficiency & longevity modifications while things were apart and the EcoDiesel tune pushed it up to 440 ft-lbs of torque. It’s quite quick and drives beautifully, of course!

My wife texted me the snapshot shown here of the warning that was popping up on the vehicle’s display, because it was never showing when she got home. I was checking the oil, though, and knew it was just fine.

I decided I needed to replace the oil level sensor in the oil pan, which was Hella part number 008891011. The part is available for less than $25, but how hard is it to replace? It’s not that bad a job!


I realized that the oil pan actually appears to be designed to be removed without pulling the engine in this vehicle, so I did the job myself and created the video below to share. (Please note that I no longer use YouTube to post my content, please check out my channel at Odysee!)


I fixed it so that we have no leaks and the warning no longer appears. This machine continues to be awesome and I’m glad my wife is driving something that is heavy, safe, and powerful, even though it is also quite efficient with fuel economy in the mid- to upper-20s.

I hope this is helpful!

The Art of Diesel Returns

control room

I’ve returned to the control room here at The Art of Diesel and you’ll be hearing more from me! (Image by GregoryButler from Pixabay)

It’s been quite a while since I have written anything for The Art of Diesel and even then the posts have been few and far between. I was running Maraschino Services for a while and even put Art of Diesel efforts under that umbrella at one point. The emphasis of that business, however, was on creating software for a client as my primary “side hustle” in addition to my day-job in the aerospace world. So, the Art of Diesel wasn’t getting much attention.

I got picked up for a position in Ohio so I left Indiana and moved to a location not far from Cincinnati this summer. As I left my previous employer after twelve years I also chose to shut down Maraschino Services so that my focus could be on my new position for at least a reasonable period of time.

As I’ve moved into a new home I’ve been doing a lot to get my family comfortable here while we claim the place as our own, meaning that we’re doing a lot to modify the house, land, and workshop to meet our needs. Yes, that means that I have a good place to work on diesels, too!

I’ve really been through the wringer at my new employer for the last six months, but the results have been good and the employer seems quite happy with my performance. While things are going well I realized that I should get back to my efforts in spreading a philosophy of self-reliance, liberty, and Catholic philosophy on the side. You won’t find me being too pushy and often quite indirect with the latter. My moral sense, however, permeates my efforts in life and will remain a part of my approach in “leading by example.”

Please stay tuned as I expect to ramp these efforts back up in the months to follow as I write and create video content on a more regular basis.

Please also note that I deleted my Facebook account after I got tired of all the politically-correct virtue-signalling I was seeing. Worse yet, however was that I saw people assuming that this was an appropriate vehicle for alerting loved ones of important events in their lives. Zuckerberg and his cronies don’t deserve to be the platform of record for our lives. Further, I really don’t like all of the data that people are willingly providing to these jerks as they run their part of the larger digital panopticon.

I took another step in October. After seeing the purges across social media that were taking place I proactively removed all of my content from mainstream social media platforms. They were systematically silencing all voices that dissent with mainstream medical opinions (extremely flawed “silence” forwarded by unqualified, unscientific, power-hungry bureaucrats) in addition to those who dared to express political opinions outside of their extremely specific political agenda. They don’t deserve to carry any content I might create, so I no longer contribute to those platforms.

I’m making  Odysee the home for the video content that I will produce. If you aren’t familiar with these platforms, you should know that they are one and the same, though Odysee has more social media features) the home for the video content that I will produce.

Free-Flowing Intake for 2009-2013 Corolla

WARNING! Unless you have some higher temperature materials than the HT PLA I used, don’t do this! When summertime hit I found out that the cylindrical section of the intake I printed was getting soft and dropped the air filter, so my engine was sucking unfiltered air in, which isn’t something you want to be doing for long. I’m keeping the article in there only because somebody using higher-temp materials might still get something useful out of it.

I’m likely to weld up a steel version of this, eventually, but haven’t had a chance.


Yeah, I know it’s not a diesel, but I have three Corollas as vehicles that are reasonably efficient and require very little maintenance.

In this video I show how to build a simple intake modification for my 2009 Corolla. The MAF sensor piece was 3D printed using ProtoPasta High-Temp PLA. Ensure any material you use can stand up to under-hood temperatures!

I’ve shared the (updated) files and more details here, including where I got the other parts:

I think there’s a small increase in performance. The sound is much growlier / sportier than before. When I fill it up a couple times I’ll report back on fuel economy.

Book Review: Letters to My Unborn Children

In the interests of full disclosure: I work with Shawn T. Collins and I’m a friend of his.

Baby Holding Dad's FingerHe let me know about his book Letters to My Unborn Children, so I asked to borrow a copy and read it. I’m Catholic and we treat all human life as sacred, starting at conception. Shawn is not Catholic, but we certainly share this widely-held Christian belief. That said, it seems a travesty that we don’t really talk about miscarriages in either my faith or in Shawn’s. I’ve found that there are some Catholic books on the topic and that the Catechism of the Catholic Church covers the topic, but when have I heard this topic discussed? When do we hear about this in the secular world?

I was amazed to find out how common miscarriages are. Reading Shawn’s book alerted me to the fact that there are a lot of people around silently mourning the death of a family member that they never had the chance to meet. Shawn refers to parenthood as an “extreme sport” and I never realized how true that really is.

There’s a risk that a topic that isn’t brought into the open will be ignored, leading to an hidden but open wound and the source of a spreading infection. Grief can’t be ignored and it’s an important part of the healing process. In this book Shawn brings his family’s grieving out into the open and deals with it using his faith, a loving relationship with his family, and the act of writing letters to the three children that didn’t survive to be born. By no means does this solve the pain and make it go away for him or for anybody. By reading this book, however, we can get a renewed sense of the value of human life and a greater appreciation for the families that we have.

I heartily endorse this book for somebody who is going through the grief of miscarriage, and also for anybody who wants to gain further insight into just how precious human life is.

Movie Philosophy: 2047 Virtual Revolution

I watch streaming videos on Netflix and Amazon Prime while I use my rowing machine. It’s not the most optimal way to watch a movie, but it sure makes the time spent exercising more fun. I watched an interesting movie on Amazon Prime this morning called 2047 Virtual Revolution.

The look of this movie was good and the graphics were very well done. However, nobody can escape that the atmosphere, scenery, buildings, flying cars, clothing, and even the handguns were all heavily inspired by Bladerunner. The creators of this movie are obviously Bladerunner fans, but they should do more to differentiate themselves. One thing was different, visually: the sun was actually emerging to light up the sky at the end of the movie. Graphics are one thing, however the plot is more interesting and led me to write down my thoughts.

There is some thematic overlap with The Matrix, but only at a high level. The Matrix used a virtual world as a political allegory representing how lies are used to control people and their behaviors in the real world. In 2047 Virtual Revolution, there are elements that seek to control and take advantage of human nature, but the virtual worlds aren’t used as allegory at all. They are exactly what they appear to be: an addiction and an escape from an ugly world that is probably made much uglier because nobody is *present* to make it a better place.

While the revolutionaries in this movie believe that everybody wants to be liberated, people prove that they’d rather be parasites to the State and corporations, escaping to live their lives in a virtual world. True liberty allows people to make their own decisions, and one character in this movie observes that nobody forced the majority of the population to become “the connected.” I think there’s a lot of truth in this. Movements for liberty often forget that the majority of people are happy to be mindless, sheep-like consumers. People will sometimes choose addictions and self-destruction over existing in a real world where they can create, assist, and participate with humanity in seeking higher purposes. Forcing people out of their ‘verses wouldn’t have fixed this.

This has much in common with Catholic teaching:

  • God himself doesn’t coerce us into following him
  • He gives us the grace to see that the light is there
  • It is up to us to exercise our free will to move toward the light
  • The majority of people won’t do it

Just thought I should share these thoughts today.

Don’t Fear the Mercedes: Diesel Return Lines How-To

On my major effort to fix the imfamous OM642 oil cooler leak, I managed to mess up the diesel return line. Now that I know how the connectors work on these, I figured I should make a quick video to share what I’ve learned. Enjoy!

Spread Too Thin

Sometimes We Let Life Get Too Complicated

Sometimes we let life get too complicated: It’s time to prioritize and simplify!

Why so busy?

I really want to do more on this channel and eventually I’m going to do that. In the short-term I’m super busy!

  • I have a demanding day-job. I manage a Zero Defects program at a major turbine engine manufacturer in Indianapolis.
  • I’m an engaged home school dad, which includes involvement in a home school speech and debate league. I actually spent this weekend performing orientation for guest debate judges.
  • My youngest child will graduate this May, and I’m up to my neck trying to get my neglected house, workshop, and grounds into a condition where they are presentable for the open house. This means I’m at the end of the home schooling process, though, meaning I’ll have more time later.
  • It’s the primary source of the material on this site, but I work hard keeping my family’s vehicles on the road. I’ve saved up quite a bit of material saved up that I could turn into videos and blog posts.
  • I’m also exploring cryptocurrencies and making some speculative bets.
  • For a while I explored eCommerce related to The Art of Diesel, even setting up a store, but this effort really failed because my heart really isn’t into selling worthless Chinese trinkets at a high markup.
  • I’ve also started Ethical Developer Group and I’ve failed to stay on top of that site, either.

New priorities

I’m a crazy person who wants to do everything, because there are so many cool things that get my attention. In the short-term, I’m going to shift my priorities to Ethical Developer Group, and I’d like every user of this site to go over there and check it out.

I will occasionally make some quick posts over here, but I’m really going to concentrate my blogging and business development over there.

Exciting things are happening, in that EDG actually has a paying client with ethics very similar to our own. We can’t share any details on this right now, but this will be a really useful Android app for a very inexpensive but useful service.

I’m also exploring blockchain technology and see some opportunities that should really be explored in that space.

I will keep working on cars and eventually I will get back to sharing my efforts and what I’ve learned, but EDG is where I’ll be putting my attention for the next few months.

Until I reach a point where I can put more effort in here:

May God bless you and keep you running on all cylinders!

Funny: Elon Musk’s Starman Seems Familiar

Audi Update

Before I get to Elon Musk and SpaceX, let me give a quick update. It’s been a long journey, but my son’s Audi is almost back on the road. It’s together and it doesn’t leak, but it still has a performance issue. After whipping out my VAG-COM and doing some data logging, the things I can measure look OK. It seems to provide really good performance at random, but especially when little demand has been made of it for a few seconds. I think the fuel filter is plugged. “Cheap” Audis? Don’t let anybody tell you that an old Audi is cheap! That said, the car is shaping up to be a lot of fun to drive, once everything is sorted out, and we might actually buy another for my daughter. AWD is a really nice thing to have and these cars are actually quite cheap to insure.

My Space Background

I have an MS is in Astronautical Engineering and I’m a genuine space guy at heart. I’m also big on entrepreneurial ventures, so I have to say that the SpaceX Heavy launch recently was really cool, including that they brought two of the boosters back for a soft touch down side-by-side.

Not a Huge Fan, But…

I’m not a huge Elon Musk fanboy. All the heavy subsidies on Teslas make him look more like a crony than a real entrepreneur. However, I must admit that he’s still doing some cool things.

The Heavy Metal Connection

The Falcon Heavy Launch featured an unusual payload. SpaceX put a Tesla Roadster in orbit. Here’s a live feed of it.

An obvious reference to science fiction (or at least sci fi parody) is found in the “Don’t Panic!” displayed on the dash. However, a more obscure reference is found in the whole concept of an astronaut driving a convertible in Earth’s orbit. The opening sequence of Heavy Metal, a rather …um… adult, R-rated rock-n-roll sci fi cartoon from 1981 featured a similar theme in their opening sequence. Have you ever imagined reentry in an early model Corvette convertible?! Set to some fun rock ‘n roll music, this opening sequence had my friends and I rolling around laughing back in he 80s.

I thought I’d just share this because it’s fun!

May God bless you and keep you running on all cylinders!


Ben Swann is Back!

My Status

I’ve been quiet on this blog for a bit, after a week-long trip to a conference for my day-job, and every single car I own needing immediate attention within the last ten days! I have material to share, but I need some time to prepare it.

Great News

Meanwhile, though, I saw this great news tonight: Ben Swann is Back!

Ben went quiet after his Pizzagate revelations a year ago, but now he’s back, partnered with DAO / Dash, and I expect to see great things from him in the future. He’s the only real investigative reporter you’ll find today. He is genuinely interested in the truth and he delivers the goods!

May God bless you and keep you running on all cylinders!

Winter Car Problems and Audi Work

Car Problems

Hey! I’ve been slow about providing blog updates, but I’ve run into a number of problems with my fleet. It seems that everything always seems to go wrong at the same time! I know that this happens to many people and it’s part of life in a fallen world. When this happens, do what I’m learning to: Keep your chin up, thank God for the blessings you have, and press onwards! Here’s what came up in the last two weeks:

  • My son’s 2002 Audi A4 Quattro started dumping about a quart of oil daily, so we dug in and found out that the head gasket was leaking. Compression is still good, but the head needed to come off! This “cheap” Audi isn’t so cheap, anymore!
  • The old 2001 MkIV Jetta TDI is having glow plug circuit issues and we can pretty much forget about driving it in subzero weather until I can troubleshoot that system.
  • My son was driving my 2005 B5.5 Passat TDI and wound up getting it jump-started one subzero morning. I had to replace that battery. I found out the old one had been in there since 2012 (before I owned it)!
  • Now I have a new oil slick on the floor where I’ve been parking the 2007 Mercedes R320 CDI. It’s just left of the centerline and toward the rear of the engine…so I need to dig into it and replace the dreaded OM642 oil cooler seal!

Audi Quattro Head Gasket

I’ve pulled the head from the engine. The photos that follow simply document the process I’ve made this weekend. Today I’ll clean up the valve cover and intake manifold to paint them up and make them pretty. When my Amazon Prime valve spring compressor tool shows up in two days I’ll replace the valve stem seals.

Audi 1.8T Without Head

I’ve removed the head from the 1.8T, and you can see the top of the engine block. I’ve checked the deck surface with a good straightedge and a flashlight. No light was leaking under the straightedge anywhere. The deck looks perfect! I’ll just clean it up good before I get it all back together.

Audi Quattro Head

Check out the 1.8T’s head. These engines are very common. They are found in a lot of VW and Audi vehicles. They are surprisingly exotic, with five valves per cylinder! That explains how it spools so smoothly. That’s also why there’s so much horsepower potential in these little engines.

Audi 1.8T Cams

I pulled the camshafts to check on things and replace the valve stem seals. Might as well, while I have the head off. The tensioner is in the background in this photo. Be sure you buy a tensioner compressor before attempting this job! It would be very difficult without this tool.

Marked Cam Bearing Journals

The Audi 1.8T’s bearing journals are lined up here. Note that they’ve all been marked so that they go back into their proper locations.

Audi 1.8T Head Without Camse

Here is the head with the cams removed. The valves are buried deep down in this head, so I’ve ordered a better valve spring compressor tool.


I cleaned up the mating surface on the head, checking it with a straightedge and a flashlight. When I do this I put the flashlight behind the straightedge and look to see if light leaks through anywhere, indicating warpage. I didn’t find any on the head or the engine block’s deck. So, I’m not sure why the head gasket started leaking oil. I suppose being 15 years old and having 180,000+ miles might have something to do with it. Perhaps the head bolts should have been retorqued at some point. I’m counting our blessings that we don’t have to go to the machine shop on this effort!

At this point, you’ve probably noticed that everything in this engine has a brownish color from varnish that has built up. I’m not going to go to crazy cleaning a high mileage engine on a “cheap” car, but it’s apparent that previous owners weren’t using synthetics and/or didn’t change the oil often enough. Well, thankfully the compression is still very good, so we’ll just keep some good synthetic oil in there (we use LiquiMoly in our VW and Audi vehicles) and it will probably clean itself up over time.

I’ll provide more updates as I work through this effort and the others that are on my TO DO list.

May God bless you and keep you running on all cylinders!