The original 350 diesel “D” block shared the same 4.047×3.385 bore and stroke as the V8 gasser and the same general dimensions, but was only 75 pounds heavier. [2] Catastrophic head bolt failures were thus legion, as diesel engines have compression ratios that are as much as three times higher than a gasoline engine. The block heater was installed in the driver side front freeze plug. On a tiny budget and with a very short timeline the Olds engineers were to create the first GM diesel for passenger cars. The upgrades included better head gaskets and stronger head bolts that threaded more deeply into the block. The 1981 “DX” engine was the one GM should have made first. Buick Engines. Going to the high end, the Olds Toronado, which had just been downsized and shared a platform with the Cadillac El Dorado, was optionally powered by the 350 diesel and offered top-dog luxury with a 21 mpg EPA combined average and a 0-60 time of 16.8 seconds. The engine was fueled by a Roosa-Master DB-2 rotary pump from Stanadyne fed by a mechanical lift pump. Olds started with their 350-cubic-inch (5.7-liter) engine (no relation to the Chevrolet 350 we discussed last month). They had two 0.017-inch orifices (0.014-inch in California) and popped at 1,800 psi. Hood has also equipped the block with old NASCAR splayed 4-bolt main caps for extra strength. Many owners tried to solve this by adding anhydrous alcohol, a common trick to deal with water in fuel, but this instead dissolved fuel pump seals and other parts. The American public appeared to be accepting the diesel and its quirky ways. There are tales of people spending exorbitant amounts of money to get the cars fixed after the warranty ran out. Toll Free. The injectors also came from Stanadyne and were a new design they called Pencil Nozzles. Turns out the threads weren’t tapped deeply enough and the bolts were too short. It’s a common misconception that the Oldsmobile LF9 diesel was simply a 350 small block hastily jerry-rigged to run on diesel fuel. Classic CARS by Year. Four TTY head bolts were not always enough to hold the heads down. Surviving executives and engineers from that time period are probably still experiencing PTSD events. The 1968 to 1974 engines featured gold-painted engine blocks. They also tried a Nissan SD33 six-cylinder diesel in a full-sized car. Thanks to the Arab oil embargos, fuel economy became the motoring public’s fixation. The later 4.3-liter V6 engine, which arrived for the 1982 model year, did not have the same problems as the V8. [5][6] Myriad lawsuits were filed as several grassroots groups formed to try to get General Motors to acknowledge the problem, made worse by simultaneous problems with GM's new THM200 automatic transmission. The 350 diesel ended up being a little faster—0-60 in 17.5 versus 20.8 for the 260 in the same 4,500-pound ’75 Cutlass test car. The Olds 5.7L diesel block was based on Oldsmobile’s second-generation gas V-8 architecture with the same bore and stroke of the Olds 350 gasser. Sometimes the head gasket failure started slowly, contaminating the oil and killing the bearings and/or the camshaft before the head gasket blew. Despite it being a stout double roller design, timing chains stretched. Power was rated at 85 bhp (63 kW) at 3600 rpm and 165 lb⋅ft (224 N⋅m) at 1600 rpm. H/P AND RAM AIR Oldsmobile 350 Economy Block Kit. The LS2 4.3-liter V6 was produced only in 1985 and installed in front-wheel drive vehicles. 1978-'80 ALL Oldsmobile 350 Economy Block Kit. Olds was selling a lot of diesels, about 60,000 that first year, plus the Chevy trucks and Sevilles (a total of about 129,000 engines). Meet the Oldsmobile 350 LF9 Diesel. You must use a gasoline Olds 350 heads, entire valve train, including camshaft, intake and exhaust manifolds and pistons. The same car with a 350 V8 gasser delivered 15/22/17. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the express prior written permission of Engaged Media.

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