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The Most Neglected Part of the Cooling System

Cooling system jobs are, by and large, gravy repairs. Sure, we get the occasional hard-to-bleed system or the heater core that’s buried. But for the most part, the work is straightforward plumbing. And selling the stuff is easy! Even the most price-conscious customer...

When Selling a Job, Get It In Writing (Not an Emoji)

This one’s for anyone who interacts with customers directly: service writers, small shop owners, and even techs who do some moonlighting or side work. Be careful when using text abbreviations, slang, or emojis with your customer, and that goes double when a customer...

The Stories Spark Plugs Have to Tell (VIDEO)

Description In the days of carbureted engines, mechanics would always take a moment to examine the spark plugs they were replacing as part of a routine tune-up. The plugs often provided valuable information as to how well the engine was performing and whether there...

Service Managers: Buy Brake Fluid by the Pint

If you’re in charge of ordering the supplies for your shop, volume discounts are great when they come along. Sniff them out where you can. But brake fluid is different! Buy it in bulk, but buy it in the smallest containers you can get away with. The reason? Brake...

Six Ways to Best Protect Yourself from Keyless Car Theft (For Now)

In 2023, a record number of vehicles were stolen in the United States; 1,020,729 vehicles to be exact. While that number has declined over the past couple of years (850,708 in 2024 and 659,880 in 2025), car thieves haven’t given up. In fact, they’re finding more...

Don’t Forget to Season the Automobiles, Mechanics!

I guess after you watch the following video, you won’t need much commentary. I thought this was common knowledge, but as I’ll explain in a moment, I may be wrong.I thought it necessary because a good friend at an independent repair facility recently bemoaned the fact...

Coolant Service – ASE Practice Question (VIDEO)

Description Technician A and Technician B are discussing proper cooling system maintenance. Technician A says that time and mileage should be considered but are not the only factors to consider when recommending a cooling system service to a customer. Technician B...

What are Frits? (And Why Does Almost Every Car Have Them?)

It’s a pretty safe bet that most younger techs haven’t heard of frits before. Not one single customer, ever, has come into your shop looking for some help with a frit problem. So while this article won’t help you turn bays faster or improve your diagnostic skills,...

A different type of timed event: the Bobby Bosch Relay Race

by | Oct 3, 2024

I’ll hazard a guess you’re familiar with the 24 Hours of Lemons. If not, it’s endurance racing for Joe Sixpack on a severely tight budget ($500). Ridiculous paint jobs are de rigueur. Costumes are encouraged. Everyone sandbags and cheats and tries to fudge the budget and sneak power-adders under the hood.

It’s not serious. I mean, it is serious, but the big prize is fun, not money. Of course there is a need for rules and a sanctioning body. By and large judges at these events are just rendering judgment on the fly and that’s that. Punishments and penalties for infractions, given the somewhat lax environment, tend to be creative.

To get you on the right track here, penalties for racing safety infractions have included mandatory wiring of the 6 tone car alarm siren to the ignition with constant hot (so the car is racing with this annoyance blaring). One penalty involved instructing a “civilian” on how to operate a manual transmission before being allowed back on track. There’s also the Grille of Damocles, presented to habitual tailgaters: a Volvo grille, modified to accept tons of threaded rod. The grille, which is then mounted to the offending car, has that rod oriented to point right at the radiator to discourage the aggressive driver. And if “Build A Cardboard Engine” doesn’t put a smile on your face, I don’t know what could.

Water pumps are often replaced because of a little coolant loss at the weep hole.
Photo: Mike Apice.
Enter the Bobby Bosch Relay Race, a form of automotive cruelty I find hilarious. Robert Bosch, a German automotive inventor who was way kinder than the people at Volkswagen who just sat around making sausage during World War II, cranked out lots of automotive relays at his eponymous company. In fact, you may even know or refer to the common 4- and 5-pin relays under the hood and dash of many motor vehicles as “Bosch-style” relays.

The Relay Race is administered when a Lemons car is black-flagged. The offending team is taken off the track to suffer a lap/time penalty, which is variable: the team is presented with ten relays plucked out of the salvage yard. Nine are good. One is not. The vehicle and driver are permitted to get back on the track and racing when the bad relay is identified and presented to the judges.

I thought this was fun when I learned about it, and I bet you will, too. If you’re still learning (and maybe convinced relays run on magic smoke), the Dorman Training Center has a pretty killer video that can help demystify the electrical diag process. (Skip to 39:39 for a super-rapid VD test being performed on a Bosch-style relay.) 75% of the wiring diagram for one is there, too. I always have to look these up when I need to test one.

It’s a deceptively simple penalty. I love it. I would giggle about it, and get back on the track quickly, I think, and you probably would, too. But it does point out how painful most people find electrical diagnostics and troubleshooting, and it’s a nice commentary on the exasperation that we all have suffered chasing mysterious maladies—and maybe a good reminder to bone up on some of the basics now and again.

Water pumps will last a long time if the engine is properly maintained.
Photo: Mike Apice.

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