4.3 V6 and 5.7L Diesel
- Thread starter GM Diesel Fan
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- 4.3 v6 4.3l v8 5.7 diesel
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6.2 & 6.5 are the same eng. 6.5 is an overbored 6.2. Practically all parts interchange, most put 6.5 heads on the early 6.2s due to head cracking issues & problems locating injectors.
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I don't have a lot of experience but yes D block was 1978-80, 81-85 was DX Block which used different injectors also and is the most common. The D Block used Pencil injectors which are nearly impossible to find any. Along with Certain Bottom end bearings and so on are "Unobtainium" ... I'm not even sure if rebuilt kits or Head gaskets are even sold... I know for the 4.3 they aren't. (They made a V6 & V8 Version), I think Mahle still makes head gaskets etc... PM me i can help you find parts & give you some contacts. Some say these days it's a "once in a lifetime" experience. G-Body diesels are becoming fewer each year.
check out the Oldsmobile diesel club on Facebook over 500 members of fully addicted guys on these. Many have 10+ Vehicles in their collection. https://www.facebook.com/groups/1475733582639360
It's nice to be different once n awhile.
The only issue with that is, I think (not 100% Correct) But after 1983 the only way to get an RWD Olds diesel was the G-Body platform all others had moved onto FWD. Also the 6.2 MIlitary had a few Eng HP Options ranging from 145 - 190. 🙂 Depending on the Model I'm sure like the M1028 A1-3. https://olive-drab.com/od_mvg_cucv_chevrolet.php
6.5 in a g-body supreme? you'd have to basically whallo out the whole eng bay for it to fit. Huge engines. I remember seeing a video YRs ago of a guy putting a 6.2 in a Malibu and he mentioned having to literally cut out and remove everything along with sections of the firewall. The eng alone w/o accessories & DRY weighs 770. I know several of my Red block (1982 only) 6.2s weighs at least 700 alone, With accessories around 960. My father had a 1998 1-Ton with the TD 6.5 and it was about 1100.
My understanding is the military grade block is heavy duty like the 82 block. A big heavy motor without a doubt. A guy on Classic Olds shoe horned one in a 55 Delta 88 and there is a 6.5 going in a G body on this site. The best use of the Olds 350 diesel is a high performance gas build.
At last, something I can speak to. The Olds diesel is the worst POS ever to come out of Lansing. In my opinion it is largely responsible for the demise of Oldsmobile. I was a proud of the brand Olds parts man during those years, so I had a real good view of the fiasco. The Olds diesel was the worst cluster to ever come out of Lansing. Conceptually, it was Olds answer to rising gas prices. Olds figured they could beef up the original design 350 gas block. It didn't work. Next they skimped on the fuel filtration system. Their design allowed too much trash and fungus to reach the injector pump. Customers who had traded every two years suddenly could not keep their cars out of the shop. There was a new updated injector pump parts trick every other month. It got so bad we were wheeling short and long blocks out in the shop daily. This for customers who never has their gas powered Oldsmobiles for anything but an oil change or a tune up. I remember we had one mechanic who could put in two long blocks in a day. We all made a lot of money selling this back to GM as warranty, but the customer base was eroding. I remember long time customers who had three and four engines warrantied in a single vehicle. Then GM would buy the vehicle back. Until then I never heard of a "buy back" lemon. And then some genius decided they'd downsize the 350 to a 260 and screw up the Cutlass line. This wasn't the only thing that killed Olds, but it was a HUGE step in the wrong direction. The unreliability of the early front wheel drive cars has a lot to do with it. As years went by, Olds put all their eggs n the front wheel drive basket when the reliability was just not there.
But this supposed to be confined to the diesel debacle. Anyway, I wouldn't hit a bull in the arse with all the Olds diesels ever built.
But this supposed to be confined to the diesel debacle. Anyway, I wouldn't hit a bull in the arse with all the Olds diesels ever built.
I love the diesel talk!!! I recently found a 79 cutlass salon diesel with the 260ci??? 4.3L V8 diesel
check her out
check her out
Those 4.3 V8 are extremely rare, many were replaced with the 350 DX or a gas motor. The 4.3 V8 diesel and 5 spd would have been an insane mileage machine in 79. Yeah, the Olds diesel failure hurt Olds reputation and the early FWD cars sucked. Once the reliable RWD gas cars, mostly powered by the dependable Olds V8, disappeared, so did Oldsmobile's sales.
My score for the year. An elderly fellow had 3 D blocks and 1 DX block for sale.
Snagged them all up.
Yes the 5.7 is very problematic, seen some motors with turbos installed. Apparently it helps alot with them.
From my understanding the difference between the 2, the mains are beefier in the DX and also has .921 lifters.
But...... if you want to make killer hp, stroke ones of these babies. They have 3 inch mains, many use a 425 crank in them. I know a gentleman that builds custom cranks for these builds. Also apparently you can bore these way over
Snagged them all up.
Yes the 5.7 is very problematic, seen some motors with turbos installed. Apparently it helps alot with them.
From my understanding the difference between the 2, the mains are beefier in the DX and also has .921 lifters.
But...... if you want to make killer hp, stroke ones of these babies. They have 3 inch mains, many use a 425 crank in them. I know a gentleman that builds custom cranks for these builds. Also apparently you can bore these way over
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