Oldsmobile Diesel Engines Top Automotive Engineering Failures Popular Mechanics

28 мая 2014 | Author: | Комментарии к записи Oldsmobile Diesel Engines Top Automotive Engineering Failures Popular Mechanics отключены
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The Top Automotive Engineering Failures: Diesels

As part of our automotive failures series, Popular is rounding up the most dismal failures in automotive history. The Oldsmobile diesel engines of the and 80s, which frequently gasket failures and hydrolock and Americans on small diesel for three decades.

Of the myriad failures from the reckless at the end of the 1970s and the dawn of the ’80s, the one perhaps the longest-reaching effect on preference was the unrelenting awfulness of the diesels. While European and much of the rest of the world are the excellence of modern small engines, the oily film of from these hastily lumps lingers on the American

GM’s impetus for creating engines came from the stringent federal emissions and regulations that began in In this era before electronic controls, the measures automakers to follow the rules meant even the brawniest V8 produced enough power to pull a car up a hill. The solution, at least to GM counters at the time, was to rush a of diesels to market. Diesels not subject to the same emissions as gasoline engines, and Mercedes and had both been successful diesel cars in the U.S. so it was the turn.

Though the engine was for all GM’s car divisions, design fell to Oldsmobile. The first cars began hitting in 1978, and clearly, there problems.

To begin with, Oldsmobile engineers based the design on the well-trod 350-cubic-inch V8. Don’t the legend that they slapped new heads on the standard The new block was reinforced and was built of a cast-iron alloy, but blocks really the problem.


Most of the came from the heads and the system.

Diesel engines using a compression-ignition scheme. The gas laws tell us that as a of gas is compressed, its temperature goes up, in the case of a diesel engine, compressed until the diesel in the combustion chamber ignites. leads to much higher ratios and combustion chamber than are present in a gasoline Typically, diesel engines more and stronger head to compensate for the diesel’s higher pressure.

The Oldsmobile diesel, however, the same 10-bolt pattern and bolts as gasoline engines, so common production tooling be used for both the gasoline and engines.

In the field, this disastrous. The insufficient head stretched or broke and led to head-gasket Once the head gasket was coolant leaked into the and because clearances in a diesel are so tight, invariably this to hydrolock and severe engine

It was a bad problem, but not the only one. One of the shortsighted cost-reduction choices was to a water separator in the fuel During that time water-contaminated diesel was quite and high-quality diesel systems and now include a device that water from the fuel. is important because diesel are highly susceptible to rust and any corrosive elements. Without the separator, corrosion was common in the diesels’ injection pumps, lines and injectors, and that failed injection pumps and maladies.

Unwitting owners also a page out of the gasoline engine playbook and dumped anhydrous (also known as dry gas) their fuel tanks to the water problem. Dry gas chemically with water and puts it into the gasoline solution, allows it to pass through the without issue. But in the Olds the dry gas also ate the fuel pump and other delicate components.

There were certainly issues with the engine: a fuel-pump timing chain, dealer service training and a testing schedule, to name a Even in good running they were just loud, and belched quite a bit of to provide acceleration that can be described as glacial. The things managed 120 hp and 220 lb-ft of torque.

the V6 variant of the Olds diesel the ills of the V8, having a denser pattern and better overall It didn’t matter, though the relations damage was done.

of the Olds diesel lasted from 1978 and 1985, and it a class-action lawsuit that saw reimbursed for up to 80 percent of the cost of a engine upon failure. The were so bad, they legislators in several states to early lemon laws. In the run, Olds diesels ruined the American consumer’s for diesels for 30 years or longer.

Only now are diesels tentatively to reenter the U.S. car market in numbers and most of those are German manufacturers.

Interesting

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