WHY THE CP4.2 FAILS
Diesel World|November 2021
AND HOW YOU CAN KEEP YOURS OFF THE SCRAP PILE
MIKE MCGLOTHLIN

By now you’ve heard of all the problems surrounding the Bosch CP4.2, the high-pressure fuel pump that’s made its way onto most common-rail engines in the pickup truck segment. You know the story well: the pump self-destructs, sends metal fragments through the lines and rails, into the injectors, and then out the return circuit.

The failure is rarely noticed before it’s too late, and by then you’re usually out a pump, lines,rails, injectors, a tank cleaning, 30 hours’ labor, and anywhere between $6,000 to $10,000. As expected, this potential catastrophe has many late-model truck owners a little uneasy about their $60,000 to $90,000 investments.

With its ultra-tight tolerances, the CP4.2 does not tolerate anything other than diesel fuel very well. But which unwanted contaminant is most common? Air. That’s right, aeration is the number one killer of these pumps.

Continue reading your story on the app

Continue reading your story in the magazine

RELATED STORIES

Cheaper Electric Vehicles Coming Despite High Battery Costs

Even though battery costs are rising, auto companies are rolling out more affordable electric vehicles that should widen their appeal to a larger group of buyers.

3 mins read
Techlife News
September 10, 2022

THE BUS IS BACK

A classic VW gets an electrifying return. [Don't call it a minivan, man.)

2 mins read
Men's Journal
June - July 2022

Argo Touts Driverless Operations in Miami and Austin, Texas

An autonomous vehicle technology company that partners with Ford and Volkswagen says it has started driverless operations in two of eight cities where it is developing its technology.

1 min read
Techlife News
May 21, 2022

The Affordable-sports-sedan Segment Isn't for Everyone, but It's Definitely for Us

Decades ago, meals looked very different. People would scarf down something called creamed chipped beef, then, without missing a beat, mix canned tuna with Jell-O to create a tuna mold.

8 mins read
Car and Driver
April 2022

Would a Russian Gas Ban Crush German Industry?

As pressure builds for an embargo, business warns of a disaster

3 mins read
Bloomberg Businessweek
April 18 - 25, 2022 (Double Issue)

Lekker, China!

"Enjoy your first class”. We know the propensity for hyperbole in advertising. We may be sceptical of such a bold statement by a Chinese brand but times have changed

4 mins read
CAR
May 2022

Stepping Up On EV Growth

The South African electric vehicle (EV) landscape is set to accelerate in 2022 with a slew of new models. But with all its power and load-shedding issues, is South Africa ready?

3 mins read
Forbes Africa
April - May 2022

A Jolt for Europe's Electric-car Makers

Sweden’s Northvolt is leading an effort to forge a regional battery champion that can compete with rivals from Asia

4 mins read
Bloomberg Businessweek
March 07, 2022

Honda Fit 1,5 DOHC i-MMD e-CVT Hybrid

Honda has become known as a pioneer of hybrid technology and the latest Fit e:HEV hopes to benefit from that reputation

5 mins read
CAR
March 2022

2022 Kia EV6

This EV changes everything at least for Kia.

2 mins read
Motor Trend
March 2022