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Watch this video on the four stages of grief for mechanics

You’ve likely heard of the psychological model called the five stages of grief. It’s used to describe the various emotions people might experience when dealing with a significant loss, and the the five stages of grief are commonly defined as denial, anger, bargaining,...

The first step I now take in vehicle diagnostics

The following four vehicles (which certainly are varied) all came to me for repair and I did not identify the root of their problems immediately. And that’s because I was staying stuck in my ways and not adapting to changing vehicles. Let’s examine. Situation One: A...

PSA: Stop throwing away brake rotor screws

Hello. My name is Lemmy, and I am guilty of throwing away brake rotor screws. At least I was guilty. I no longer commit this sin. You know the pieces I’m talking about. They’re the little screws with the huge heads that get boogered up when you try to remove them...

What tools do you keep in your road box for car repair? (VIDEO)

Description Do you have a toolbox ready to go for repairs on the road? What do you keep in it? Lemmy and Nick discuss the essential tools and supplies you’ll need to handle breakdowns, quick fixes, and other jobs miles away from your shop space.

Best of Shop Press 2024

As 2024 draws to a close, the Shop Press team assembled some of the most notable articles, videos, and more of the year. Our goal all along has been to provide a unique voice on a mix of topics that speaks to mechanics and the mechanically inclined like no other...

Fronting & facing and staging orders: the fast track to the wholesale parts counter

Most people in the auto parts industry look at putting parts on shelves or taking them off as busywork; something to be avoided. Goofing off or smoking a cigarette seems preferable. During my time slingin’ parts, however, I felt differently and still do. I asked a few...

Watch how magnetizer/demagnetizer tools work in this excellent video

During some recent work on an older SUV, I was absolutely fed up. I couldn’t take it anymore. I had just finished a fair bit of grinding and filing, and when I reached for my screwdriver to start installing some parts, I saw that the tool’s tip looked like the Wooly...

Tool review: Klein 3255 bull pin

Disclaimer: I purchased this tool at full retail price at my own expense, with no compensation to write about the item. Most mechanics I know value tools that have either of the following characteristics: Useful, but from another industry (because it might be useful...

In The Bay

A simple tip for burping a radiator

by Lemmy | Dec 7, 2021

13 Comments

Ever drain and fill a coolant system and watch the temp gauge spike afterwards? Air trapped in there can cause a car to act like it has a cooling problem. It’s annoying to let the car cool so you can work on it, then re-bleed and possibly still have the same problem.

This minor inconvenience is so prevalent that many cars include a little hole (with a jiggle valve) built into the thermostat housing, which should be the highest point in a cooling system.

Burping (so named because of the noise made by the bubbles of coolant exiting the radiator filler neck) is done with the radiator cap removed on cars without a valve. You wait for the car to warm up so the thermostat opens, and then the pressure of the expanding coolant being heated drives the air out. Or at least that’s how it’s supposed to work, anyway.

I learned a trick from an old racer that works real well to bleed that rarely leaves me repeating my work.

Take a screwdriver and manually open up the thermostat. Wedge an aspirin – the old white kind you can get at the drug store for 97 cents – in between the thermostat frame and the mechanical valve itself. It will keep the thermostat open, allow coolant to flow wide open even in the coldest of temperatures, and will dissolve in fifteen minutes – plenty long enough to get the system purged of air.

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