Can a 5.7 diesel convert to an Olds 350?

[SupRNatural]

Wrong!! I know this is a dusty thread but I can't stand when someone explains something incorrect . The 350 olds diesel was a completely different block (much higher nickel content) Could be safely bored .125 thousandths overbore without sonic testing , Heads, intake, complete engine were not the same.. It shared the bolt circles to attach the accessories,transmissions but that's about it. After 1980 the main journals were 3" BB ones. Also roller cam, and lifters were installed.

The GM genius's never installed a factory fuel and water separator in any GM diesel equipped car till 1984, They Installed weak head fasteners nor prepped the public on how to care for a diesel. By then the damage was done. Water and oil don't mix so many who filled up at other than truck stops (huge amounts of diesel fuel sales) were almost guaranteed water in the fuel. Which spelled disaster because most people did not have a clue and drove them just like gas powered cars. Poor R&D, and public awareness killed GM not this engine. I know a few that have hit 200-300k. Not bad for the worst engine GM ever produced

FYI Most racing builders use the DX block to build a big cube bullet race engine so if anything the diesel is converted to a Gas engine.

Originally Posted by CoupeDevilleRob

They are going to move this to a different forum but....

The GM 5.7 Diesel is an Olds 350. The diesels were converted from gas engines, which is why they sucked. Just use the accesory brackets from the Diesel on the gas engine and everything should be pretty direct.

[carnut]

1978 was the last year of the large Eldorado. No diesel was offered till the down sized car in 1979!!!!The Seville, already down sized in 1976, had a diesel in late 1978, at least in California. So you are either looking at a Seville or a 79 Eldo. Oh my GOD!! didn't realize a 4 year old thread??? Never mind.

[SupRNatural]

I have a mint 1982 Eldorado Biarritz Diesel. Autumn Maple Firemist/White Leather Interior,White half landau top. I have a few things to do with her before I bring her back online. She's real pretty and rare too.

Originally Posted by carnut

1978 was the last year of the large Eldorado. No diesel was offered till the down sized car in 1979!!!!The Seville, already down sized in 1976, had a diesel in late 1978, at least in California. So you are either looking at a Seville or a 79 Eldo. Oh my GOD!! didn't realize a 4 year old thread??? Never mind.

[N0DIH]

A friend of mine said the D Block is better than the DX for racing, thicker cyl walls.....he runs low 10's on his.... only 363 CID or so. Not bad for a nearly 8000 rpm SB Olds.....

[SupRNatural]

The blocks are not much different if at all, though still much beefier than the gas blocks. Pre 1981 they used pencil tipped injectors which gave the motor a whopping 125 hp 1981 GM added BBO 3" main journals up from 2.5" a roller cam & lifters and internal EGR. 1982 engines had wide beam connecting rods and much improved connecting rod bushings also. I like them even though most speculators hate them. I dare to be different.

Originally Posted by N0DIH

A friend of mine said the D Block is better than the DX for racing, thicker cyl walls.....he runs low 10's on his.... only 363 CID or so. Not bad for a nearly 8000 rpm SB Olds.....

[SupRNatural]

Here's a 79' olds D block wagon with 350k Just imagine if GM had put a small bit of R&D in schooling their mechanics and the public prior, maybe things would have not been so twisted back then, and they wouldn't be so F-ed up today. Should have, would have, could have.

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