Worst GM engine ever made?

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Aug 26, 2005 | 12:59 PM

#76

go_racing84

Laughing Gas

Joined: Aug 2004

Posts: 964

Likes: 1

From: Roseburg, OR

Here's a good Wiki entry about GM diesels

http://en.wikipedia.org/wiki/Oldsmob...esel_V6_engine

Aug 26, 2005 | 01:19 PM

#77

mblayton

More Turbo

Joined: Nov 2004

Posts: 725

Likes: 0

From: Western Canada

GM,s 70,s diesel motors for cars that were gas blocks with diesel parts in them.

Aug 26, 2005 | 01:29 PM

#78

ARMORER

Elder User

Joined: Dec 2004

Posts: 742

Likes: 2

From: Eastern Iowa

Quote:

Originally Posted by 03XLT4x4 Flareside

Lets not forget about the 4.3 V6 Diesel engine GM used in the early 80's midsize FWD cars. No power, noisey,oil leaking piece of crap, what a turd!

Ha ha! I almost fogot about those! My lil sis had a FWD cutlass with the 4.3 diesel. GUTLESS! It was good on fuel though. Gas station attendants were always yelling over the intercom "No! No! You're filling your car with diesel!" When I would borrow it I would purposely fill it up, just to screw with the attendants. I would say "Oh crap! You gotta be kidding me, diesel?" Then I would start it up and drive it away. Funny. You had to be there............

Aug 26, 2005 | 04:04 PM

#79

alchymist

"Mifflin Clay"

Joined: Jul 2005

Posts: 3,177

Likes: 4

From: Mifflin, PA

Nobody recalls the King Midget??

OOPS, wrong forum. Didn't have a GM engine, I think it was Briggs & Stratton.

Aug 27, 2005 | 08:54 AM

#80

jesta302

Senior User

Joined: Aug 2004

Posts: 173

Likes: 0

I still drive my 85 2.8 v-6 S-15. Dog for speed, but pulls my firewood trailer great, with bed loaded too. Drips some oil & the clutch leaks, but other than that, you can't kill it. Has even survived my 17 year old's high school days.....Was just offered $1200 for it. I think I'll take it...

Aug 28, 2005 | 02:14 PM

#81

danomac

New User

Joined: Aug 2005

Posts: 10

Likes: 0

From: Vancouver, Canada

Quote:

Originally Posted by amish77

hey the cadillac 4/6/8 was a terrible system, and I think that it shouldn't be used now. I mean it's unequal wear on the cylinders, and the ones firing have to carry the others. Not to mention that gasoline is partially a lubricant and coolent tot the top end. It seems like a bad way to save gas to me.

How is it unequal wear on the cylinders? The pistons still travel in the cylinders when the valve train is deactivated. The disabled cylinders after a couple travels up and down in the cylinders will just compress/uncompress the gases in the cylinder and there won't be any power lost (other than frictional losses present in the deactivated cylinders, which isn't much.) This also keeps the cylinders warm (compression of those gases still generate heat to keep those cylinders warm.)

I've heard of fuel keeping the fuel pump cool, but not used for cooling or lubrication in the intake itself. If the intake needs cooling, on some engines I've seen, they have coolant running through them.

I've owned 2 of these cars with functioning systems. I think this system is more misunderstood than anything else. I also have the factory manuals with the principles behind the modulated displacement if somebody want me to enter it (it's 3 paragraphs.)

Edit: I've owned a 4.3L V6 Olds Diesel. Gutless, and the engine I had was leaking diesel into the oil pan.

Dec 9, 2006 | 09:59 PM

#82

cliff tate

Junior User

Joined: Dec 2006

Posts: 44

Likes: 0

worst gm engine

the vega aluminum block could be bored and cast sleeves wher available,but it was a dog. worst for me was 1994 gmc 6.s turbo diesel, 5 fuel injection pumps in 1 year, they did take it back eventually cliff

Dec 9, 2006 | 11:08 PM

#83

arctic y block

Post Fiend

Joined: Sep 2006

Posts: 14,325

Likes: 14

From: Island Southeast Alaska

348 the pre runner to the 396. Broke cranks easy

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Dec 10, 2006 | 09:36 AM

#84

osbornk

Postmaster

Joined: Nov 2004

Posts: 2,511

Likes: 0

From: Marion, VA

Quote:

Originally Posted by danomac

Edit: I've owned a 4.3L V6 Olds Diesel. Gutless, and the engine I had was leaking diesel into the oil pan.

I had an 83 Celebrity with the 4.3 diesel. It was a company car and the engine never gave me any problems in 60+ K but everything else on the car broke. I talked to the second owner and they junked it at about 160,000 miles but it was because the rest of the car was worn out and not the engine. The 4.3 diesel was better then the 2.8 gas alternative.

Dec 10, 2006 | 09:52 AM

#85

Birddog63

Senior User

Joined: Nov 2006

Posts: 109

Likes: 1

Why not.... It's an old thread but I didn't see these two on the list.

301 Turbo

231 Turbo(1979-1981 carbbed engines)

Dec 10, 2006 | 11:05 AM

#86

scottie2hottie

Postmaster

Joined: Dec 2003

Posts: 2,833

Likes: 0

From: Honkytonkville

I'm sure I'll get yelled at for this but my buddy works on a lot of cadillacs and the 472/500 motors boast a lot more than actually can put up. They seem to last all right but the power isn't there for the size. When i first heard of a 500 that 'Oh yeah' song from ferris beuhler went through my head, but overall they are dogs.