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A Crash Course on Modern Impact Sensors

We’ve come a long way since the automotive impact detector was developed decades ago. One clever design used a metal ball in a tube that would move to complete a circuit during a collision. This rudimentary accelerometer proved that the idea of detecting a collision...

Alignment and Inner Tie Rod Play – ASE Practice Question (VIDEO)

Description A vehicle equipped with a MacPherson strut suspension is in the shop for new tires and an alignment. The technician notes play in the left-side inner tie rod end. What should the technician tell the customer?A) The play will not affect the vehicle's...

Put the Second Floor to Work

Paying the mortgage (or the rent) on the bricks—the actual shop itself—is an expense. (A fixed cost, if you want to be particular.) But that building does more than keep your tools and techs dry. It provides room to work and house equipment. And if you’re like most...

How Does Regenerative Braking Affect Brake Wear?

We’ve come a long way since the days of rubbing wooden blocks against a wagon wheel to slow down a carriage. Modern braking systems are amazingly effective at halting several thousand pounds in a safe, controlled manner. The most common automotive braking technique is...

Don’t Overlook the Elementary

Today’s article is one borne from experiences. Exasperating experiences, no less. All novice mechaniclets are taught engines need fuel, air, spark, and compression to run. This is true, but we often take those for granted, and diagnosing even one vehicle with a basic...

ADAS Alignment and Calibration – ASE Practice Question (VIDEO)

Description Technician A says that the thrust angle must be maintained at zero degrees when performing an alignment on many vehicles equipped with certain ADAS systems (like lane departure warning). Technician B says that the steering angle sensor must be properly...

The fastest way to remove valves from a cylinder head (VIDEO)

by | Apr 28, 2022

Removing valves from a cylinder head should be done carefully if you have a notion to reuse the valves, springs, collars, and keepers. A spring compressor is the right tool for the job.

That said, in my salvage yard days, I learned a trick I still use today if I’m stripping a head for scrap. It’s the fastest method in the world, hands down. I’m not gonna say I’ve never pulled this trick on a customer car, but I will say I don’t use it often nowadays.

  1. Pull the head and the cam(s) if it’s an overhead cam engine. Set the head on a non-marring surface with the valve stems pointed up.
  2. Select a socket with an OD that’s a little smaller than the OD of one of the valve keepers.
  3. Flip the socket’s open end onto the keeper and whack the end with a deadblow hammer.
  4. Lift the socket up carefully, collect the keepers, collar, and spring. Lift the head and fish the valve out of the combustion chamber. (Keep ‘em together and labeled if you’re gonna put these parts back into the head or you’re lapping valves.)

If you’re quick and you’re not worried about retaining parts, you can strip down a four-valve four-cylinder head in under a minute. Watch your hands and peepers!

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