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  #16  
Old 11-25-2003, 06:25 PM
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FWIW, as mentioned by some forum members, using diesel or contaminated/bad gas or kerosene in a gasser will cause car to sputter and stall and foul the spark plugs, seen it many times.

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  #17  
Old 11-25-2003, 08:19 PM
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Quote:
Originally posted by The Warden
... And, yes I'll admit to having a bias against GM I have a feeling that, if M-B couldn't overcome thermal expansion (I don't think the newer engines are any different; just, they're still new enough that problems haven't really cropped up), I have a lot of trouble believing that GM was able to.

Just my $.02... I LOVE MY CAST-IRON DIESELS!!
Not to be smart, but GM had nothing to do with the design of the Duramax engine, it is made by Isuzu. Besides, if it means I actually have to take care of my vehicle to expect it to last, I guess I can handle that.
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  #18  
Old 11-25-2003, 08:43 PM
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Aluminum heads have been used with iron block for many years on imports and they seem to last as long as any iron head/block combinations. The only things that I have seen is that aluminum heads are more prone to warpage when overheated and they can suffer some serious damage from detonation. I've seen an aluminum head that suffered detonation and it looked like someone took an ice pick to the combustion chamber. Also on gas engine aluminum heads it's very common to strip the spark plug threads.
Back when I was in my teens I had a couple of old cars with iron head/blocks where I ran out of water in the radiators and over heated them to the point where they just stopped running. I thought they were cooked but when they cooled down, I just refilled the radiator and they ran like nothing had ever happened.
On one with an aluminum head this would have blown the head for sure or even worse.
I agree, iron blocks with iron heads are best.
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  #19  
Old 11-25-2003, 09:16 PM
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My PO said that she would add gas sometimes in winter when it got very cold. She said it helped it start better. She would add like 2 gallons out of 22.
David
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  #20  
Old 11-25-2003, 10:21 PM
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aluminum heads on a gasser to me is only axeptible but on a diesel where operating temps are much higher just worries me. that gos for the druamax and the newer MB diesels.
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2 parts egg, 4 parts flour, 1 part salt and 6 parts 55 Cetane diesel fuel

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  #21  
Old 11-25-2003, 10:47 PM
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Seth:

Diesel engines run with lower peak pressures and lower peak temps than gas engines. Aluminum heads (and blocks for that matter) will be the norm, if they are not already.

The ONLY drawback is that head gaskets aren't going to last as long on aluminum head/cast iron block engines, but that still doesn't mean all that much -- typically, at least for MB 60x engines, (gas engines ditto) the valves will need replacement before the head gasket goes. Not always (so I won't get jumped on!), but 180,000 miles and up on a head gasket isn't anything to complain about. I can remember when 50,000 without at LEAST a valve job was almost unheard of, and 100,000 miles on a car was something to celebrate.

My current lowest milage car, I think (odometer problems) is the 220 D with a 615 engine (cast iron head) -- on the order of 170,000 miles or so. All the aluminum head/iron block engines have 180,000 plus on them (actual milage on the 280 SE is probably closer to 200,000, has 179,000 on the odo at the moment). Only the TE has had the head off, although the Volvo (at 220,000) is going to get a new head gasket soon.

Peter
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  #22  
Old 11-26-2003, 01:18 AM
Knotman
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blending diesel and gasoline

I quote from my Owners Manual (1980 300TD):
If winter diesel fuel is used, there will hardly be any malfunctions at outside temperatures reaching as low as -16 C. /+3 F. Varying with the temperature, add a certain quantity of kerosene, if only No. 2-D summer diesel fuels or less cold resistant winter diesel fuels are available or if temperatures drop below -16 C. / +3 F. If regular gasoline does have to be added, its proportion should not exceed 30%. Premium fuels are not to be used. End quote. It goes on to recommend up to 50% kerosene at temperatures below -16 C. I may begin my WVO experimentation by blending settled and filtered WVO with diesel or gasoline. I'm in Central California about 15 miles from the coast; frost is not really common here.
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  #23  
Old 11-26-2003, 01:51 AM
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Are you sure the owner's manual mentions gasoline? Mine only mentions kerosene. I wouldn't recommend putting any gasoline in your diesel. Of course, it's your car, but you've been warned.
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  #24  
Old 11-26-2003, 08:07 AM
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Re: blending diesel and gasoline

While going home around 2AM I stopped to top off my tank and wasn't paying much attention while I added 16 GALLONS OF REGULAR GASOLINE . Within a half mile I felt a huge power loss, the water temp went up, and I had the most God-awful idle rattle I ever heard. The next day I drained it and refilled with diesel and never suffered any damage.
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  #25  
Old 11-26-2003, 09:21 AM
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sounds like you had some luck in that.... i wish i couls say the same about that guy in the druamax becouse by the lookes of it he filled about 30+ gallons.....
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2 parts egg, 4 parts flour, 1 part salt and 6 parts 55 Cetane diesel fuel

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  #26  
Old 11-27-2003, 10:07 AM
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Lightbulb gas+kerosene

friend had an old Bentley (gas engine) that could switch to pure kerosene at high speeds.

fwiw,
i will never never put gas into my diesel even in a small amount.
kerosene yes if it's really cold out, but no gas.
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  #27  
Old 11-27-2003, 01:44 PM
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I got a cell phone call once just as I was starting to fuel up and accidentally put 3 or 4 gallons of gas in my 240D. I remembered that it wouldn’t hurt the car so I just topped off with diesel and drove it as normal. The car ran as if it was cold is all. The next tank it was almost normal and by the third tank it was fine. I may have worried if it was a Duramax or if I had totally filled it up with gas.
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  #28  
Old 11-27-2003, 04:44 PM
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many older tractor engines, internationals of the 1950's especially were dual fuel engines, diesel on one side and gas with
spark plugs on the other. you would start the engine by gas and a compression relief lever then switch to the diesel side. in the 6volt electrical days starter motors and batteries werent strong enough to start a diesel.
gasoline once mixed with sufficent oil no longer is explosive, it
just burns along with the oil. shouldnt cause problems beside less lubing qualities.

don
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  #29  
Old 11-27-2003, 05:23 PM
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Re: blending diesel and gasoline

Quote:
Originally posted by Knotman
.. I may begin my WVO experimentation by blending settled and filtered WVO with diesel or gasoline. I'm in Central California about 15 miles from the coast; frost is not really common here.
This is what I do and Im having great success. Of course I have the OM617 turbo that will run on about any slimy stuff you an put in it.

Here is a thread to start you on more blending WVO info. Do a search there for other threads authored by same guy and youll get even more detail.

There is on that bulletin board a whole discussion on how the addition of gasoline works. Its not a "bad" for the engine AT ALL if you keep with in the range where it will fully detonates. It does definately aid in combustion. It's just that a good diesel engine does not need aided EXCEPT..... in very cold weather; or any other reason where the fuel may end up with increased viscosity when compared to diesel. The gasoline also aids to thin the viscosity so not to put too much drag on the IP and fuel pumps.
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  #30  
Old 11-29-2003, 01:25 AM
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In our big trucks (MACK), we run about 20 to 30 percent kerosene in the winter. We see the greatest difference in the starting ability. Once you get it running with the fuel circulating through the fuel heater, there is no difference than in the summer. As a result, if I don't have any fuel additive around when I fill my 300D up, I will put about 5 gallons kerosene in in the winter. I have put a cpuple of gallons of gasoline in without much trouble, but the greater the mixture of gasoline, the more dangerous. It was real interesting to see the result if someone accidently put gasoline in one of the old two-stroke detroits. It's really amazing how many RPM's that thing would turn before it blew.

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