And another odd ball V-6 Old Cummins

[hammersley]

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2420706177&category=33615

 

[keimmmo]

From what I see it looks like the motor many Mexican build 6 and 10 wheelers used back in the 70s and 80s. They were a V-6 normally asperated with 4 valves per cylinder. They are known for good torque... and to be exceptionally loud! They rattle worse than any 24 valve second generation pickup and have an exhaust note that will wake the dead... especially when run with dual 3-4 inch straights all the way out the back under the bed in typical Mexican style!!! I don't have much specific information about the motor, but I could easily get it.



Steve

 

[rrausch]

AAIIIEEE CHIHAUHAU!!!!

 

[HoleshotHolset]

I'd be interested in seeing the specs... .



Looks like a Detroit 6V series.....



Matt

 

[benhall]

I bet that might fit in a Dakota or something close.

 

[A Johnson]

Cummins 378, they were in cranes, stand by fire pumps, skidders, I think marine, and probably a few other applications. They also had a left hand version. Not much of an engine in my opinion, and very expensive to repair anymore,most are repowered with a 4 BTA if neccessary, and 4B's do a good job of replacing them but are short on RPM sometimes. Used a PT fuel system, (cam actuated injectors). I don't think they were over 150HP.



A Johnson

 

[Straight6Jeff]

No Matt, you don't need it. Although, it would make a good home for the boat anchor turbo's you purchased at last years Muncie.

 

[HoleshotHolset]

Jeff: I just wanted some specs..... Heck, I'd like to have access to specs from every diesel engine ever made... . you know... just for fun!



As for the boat anchor turbos - I think one of them is destined for a homemade gas turbine setup (not anytime soon... . )... . and the smaller of the two will end up on my truck in a Hilljack twin-turbo system.



Matt

 

[krs]

It looks exactly like the V6 gasser that GMC installed in the sixties. That engine was a converted diesel but I always thought it was a detriot. As a diesel it was used in spotter tractors in pairs - one lefthand one righthand mounted back to back with both aspirated by a single 671 blower and called "screamers" because of the tremendous noise they made.

 

[Blakers]

Originally posted by KRS

It looks exactly like the V6 gasser that GMC installed in the sixties. That engine was a converted diesel

Those V6 Jimmies were nothing like a Detroit. I know they put two together in some trucks to make V12s, but why do you say they were converted diesels?

 

[krs]

"why do you say they were converted diesels?"



Because I owned the gasser and saw the diesel. The blocks were identical, the gasser heads even took sparkplugs in the same location as the diesel had injectors. The gasser main and rod bearings were (are) gigantic, something near 3. 75" x 1. 75" on the mains, I think. I bought a spare gasser engine for my truck and tore it down in order to move it into my basement and saw the parts. Everything was overbuilt for any gas engine. I didn't say that it WAS a detroit, I said that I thought it might be. I didn't know who made it but it could be assumed to be a detroit product since it appeared in GM products. The spotters mentioned were GMC vehicles with back to back (call them) V12 diesel screamers. Now, the engine pictured here IS exactly like my GMC gas engines - everything I can see is the same, V/Cover shape, pulley configuration - exhaust manifolds, intake manifold, everything - Same engine. That's why.

 

[Blakers]

No. Those V-6 gas engines were just built tough because they were built for heavy duty truck use. Just like the old 534 Ford V-8s. Lots of iron and run relatively low RPM. I don't think there's any resemblence to a GM diesel. You'd have to look at a cross section view. There's quite a difference between a two cycle engine and a four cycle engine.

 

[jrobinson2]

The GM diesel KRS is referring to is called the Toroflo diesel, it was a 4 stroke not a Detroit 2 stroke, my dad had one in an old early 60's GMC 10 wheeler and said it appeared to be the same as the 305 V6 in his 61 GMC pickup and his understanding was that the bottom end was the same on gas and diesel versions, the heads and such were different.

Jared

 

[Blakers]

Ok. I never heard of those, but I learn something every day. Thanks.

 

[RThompson]

The GM V12 gasser from the sixties was derived from 351 ci V6 parts. Four V6 heads, two intake manifolds and four exhaust manifolds and a common 12 clyinder block. 702 ci total and about 285 hp. class 8 truck engine and had reputation as a gas sucker. Not even close to a detroit diesel. They did use V6 gas engine block castings and did a conversion to diesel calling it a ToroFlo. That was another big time piece of junk from GM.

 

[krs]

Thanks jrobinson2!



Though the diesel may not have been the greatest, the gas version was the strongest engine I've ever owned. I bought that truck with 96,000 miles, kept it for 20 years, and sold it a year or so ago still going strong at 341,000 miles. It was a beautiful 1964 GMC 3/4 ton with their deluxe cab and chrome with turquious and white paint - original. It was noisy and not happy over 60 mph but it would pull stumps and I literally could get out and walk alongside of it in compound low. 11mpg loaded - 11 mpg unloaded, up hill down hill - 11 mpg.

 

[jrobinson2]

My dad got his '61 GMC around '70, a 1/2 ton shortbed with 80,000 miles, 305 cid V6 and 3. 25 gears, 18mpg highway 16mpg city. The odometer quit in '76 at about 165,000 and the truck was used as his daily driven work truck until '96 or '97 at about 9,000 miles a year, so close to 350,000 stop and start hard farm miles. The only work done to the engine was for a burned valve when he bought it, the trans has never been out (original clutch!) still has original starter and generator (several sets of brushes and bushings and a few starter drives). Blew the rear end in '78 and changed to 4. 10 gear, killed the gas mileage but would pull like tractor. I have never seen an engine that would lug as low as that truck, I watched dad pull a 720 John Deere out of the shop and you could count the cylinders firing by watching the rear tires slip, it couldn't have been over 250 RPM and just kept on pulling! The engine is still fine just used up the rest of the truck

Jared

 

[hammersley]

Is this the V-6?

http://www.6066gmctrucks.org/305V6.htm - I worked around these in teh 60's in my Uncle's ESSO Service Station - we had a heck of a time keeping the twin water hoses from leaking - did they ever get that fixed?

 

[hammersley]

GMC Advantage of a Short Stroke Motor --- Reasoning

This is a Webpage on the 60's GMC truck V-6 - read what thsy state down under the advantages of a SHORT STROKE DESIGN!



It does your job better and saves you money. Here are a few reasons why:

It's short stroke reduces internal friction . . . gives full power with less piston travel . Result is less engine wear . . . longer engine life.





Heres the webpage:http://www.6066gmctrucks.org/305V6.htm