Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 02-13-2006, 05:22 PM
Goowrangler's Avatar
si solamente
 
Join Date: Jan 2006
Posts: 30
Talking Gas in a diesel engine.

why can't you put gas into a diesel engine?

What is the exact definition as to why you shouldn't?

from what i think and your guys ideas of makeing Biodiesel and that other kind that you actaull mix gass with to kind of refine it why not use starigh gas.

don't worrie i am not going to do that to my engine. i am curious and no one can give a good straight answer.

Don' think i am an idiot i just thought that if ya'll are refining grease to go into the engines why not use dsomething that is refined even more then diesel itself

please help me understand.

~kb
__________________
Kaleb, 17 years old. I own a 1988 jeep wrangler. it has a carburated 4.2 liter. it also has an automatic. I bought it all stock from a man that had it for a couple of years and had bought it from the original owner. when the guy dropped it off it was driving some what good but not the way i test drove it. i put alot of new things in it, the list is:Radiator, water pump,fuel lines, fuel filter, plugs and wires, egr valve, pcv valve, jet and seat. i think thats it.
Reply With Quote
  #2  
Old 02-13-2006, 05:25 PM
TheDon's Avatar
Open Discussion Moderator
 
Join Date: Oct 2005
Posts: 13,208
diesel engines are compression engines while gas engines are spark ignition engines. last time i checked gas doesnt combust under compression like diesel fuel. something like that
Reply With Quote
  #3  
Old 02-13-2006, 05:27 PM
MS Fowler's Avatar
Registered User
 
Join Date: Jan 2003
Location: Littlestown PA ( 6 miles south of Gettysburg)
Posts: 2,208
Gasoline burns too quickly. Combustion would begin while fuel was being injected.
Reply With Quote
  #4  
Old 02-13-2006, 05:32 PM
ConnClark's Avatar
Power User
 
Join Date: Nov 2005
Posts: 1,121
The only reason I know for sure of is gas has a lower BTU rating and doesn't generate as much power as diesel. Anti knock compounds might also cause trouble.
__________________
green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

http://ecomodder.com/forum/fe-graphs/sig692a.png
Reply With Quote
  #5  
Old 02-13-2006, 05:34 PM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 14,978
Gas is way more explosive than diesel is, its a solvent. Diesel is an oil (thats why it doesn't evaporate). Diesels are high compression in order to explode the diesel fuel, between 18:1 and 24:1 usually, the MB's are around 22.5:1

Gas engines are between 11:1 and 8.5:1 in compression usually, they use the spark plug to explode the fuel.

Gas is also not a lubricant, so not only does it destroy the engine, it will ruin the injection pump as well.

Conclusion: Use diesel in a diesel.
__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 75k - mine - (OC-77,000)
'17 Metris(VITO!) - 6k - wifes (OC-10k)
'01 E320 Wagon - 157k - mine (OC-160,000)
'89 420SEL 166k - mine (OC-167,000)
'01 E320 - 167k - dad's (OC-171,500)
'07 E350 Wagon - 129k - dad's (OC-132,500)
'01 SL500 - 48k - dad's (OC-52,000)
'09 E350 4matic Sedan - 122k - Brothers (OC-127,000)
Reply With Quote
  #6  
Old 02-13-2006, 06:02 PM
Goowrangler's Avatar
si solamente
 
Join Date: Jan 2006
Posts: 30
Another thing that i wanted to know is why don't diesels overheat like gas engines?
__________________
Kaleb, 17 years old. I own a 1988 jeep wrangler. it has a carburated 4.2 liter. it also has an automatic. I bought it all stock from a man that had it for a couple of years and had bought it from the original owner. when the guy dropped it off it was driving some what good but not the way i test drove it. i put alot of new things in it, the list is:Radiator, water pump,fuel lines, fuel filter, plugs and wires, egr valve, pcv valve, jet and seat. i think thats it.
Reply With Quote
  #7  
Old 02-13-2006, 06:10 PM
rg2098's Avatar
Detailing Moderator
 
Join Date: Jun 2004
Location: Rochester Hills, MI
Posts: 2,415
Quote:
Originally Posted by Goowrangler
Another thing that i wanted to know is why don't diesels overheat like gas engines?
Oh they can. But diesels have an unregulated flow of air coming into the combustion chamber which can have a cooling effect compared to a gas engine which severely limits the amount of "cold" air.
__________________
Adam Lumsden
(83) 300D
Vice-President of the MBCA International Stars Section
Reply With Quote
  #8  
Old 02-13-2006, 06:11 PM
TX76513's Avatar
Platinum Member
 
Join Date: Apr 2003
Location: Brandon, Mississippi
Posts: 5,203
Quote:
Originally Posted by Goowrangler
Another thing that i wanted to know is why don't diesels overheat like gas engines?
Who told you that
__________________
BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif
15 VW Passat TDI
00 E420
98 E300 DT
97 E420 Donor Car - NEED PARTS? PM ME!
97 S500
97 E300D
86 Holden Jackaroo Turbo D
86 300SDL
(o\|/o)
Reply With Quote
  #9  
Old 02-13-2006, 06:12 PM
TheDon's Avatar
Open Discussion Moderator
 
Join Date: Oct 2005
Posts: 13,208
Quote:
Originally Posted by Goowrangler
Another thing that i wanted to know is why don't diesels overheat like gas engines?
everything overheats its just a matter of when
Reply With Quote
  #10  
Old 02-13-2006, 06:13 PM
rg2098's Avatar
Detailing Moderator
 
Join Date: Jun 2004
Location: Rochester Hills, MI
Posts: 2,415
Quote:
Originally Posted by Goowrangler
why can't you put gas into a diesel engine?

What is the exact definition as to why you shouldn't?

from what i think and your guys ideas of makeing Biodiesel and that other kind that you actaull mix gass with to kind of refine it why not use starigh gas.

don't worrie i am not going to do that to my engine. i am curious and no one can give a good straight answer.

Don' think i am an idiot i just thought that if ya'll are refining grease to go into the engines why not use dsomething that is refined even more then diesel itself

please help me understand.

~kb
Gasoline will combust to quickly and explode as the piston is still traveling up. This basically causes the piston to hit a "wall" mid travel and be forced back down before the crank is in the right position to allow it back down.
__________________
Adam Lumsden
(83) 300D
Vice-President of the MBCA International Stars Section
Reply With Quote
  #11  
Old 02-13-2006, 06:15 PM
Registered User
 
Join Date: Sep 2003
Location: Manhattan, KS
Posts: 596
Quote:
Originally Posted by rg2098
Gasoline will combust to quickly and explode as the piston is still traveling up. This basically causes the piston to hit a "wall" mid travel and be forced back down before the crank is in the right position to allow it back down.
Exactly. Same phenomenom that happens to a slight degree when you hear a gasser knocking due to using low octane fuel or bad timing.
__________________
Keep everything as simple as possible-but no simpler--Albert Einstein
Reply With Quote
  #12  
Old 02-13-2006, 06:26 PM
ConnClark's Avatar
Power User
 
Join Date: Nov 2005
Posts: 1,121
Quote:
Originally Posted by rg2098
Gasoline will combust to quickly and explode as the piston is still traveling up. This basically causes the piston to hit a "wall" mid travel and be forced back down before the crank is in the right position to allow it back down.
ummmm.... a diesel engine doesn't inject the fuel on the compression stroke.
__________________
green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

http://ecomodder.com/forum/fe-graphs/sig692a.png
Reply With Quote
  #13  
Old 02-13-2006, 06:41 PM
rg2098's Avatar
Detailing Moderator
 
Join Date: Jun 2004
Location: Rochester Hills, MI
Posts: 2,415
Quote:
Originally Posted by ConnClark
ummmm.... a diesel engine doesn't inject the fuel on the compression stroke.
Quote:
A diesel engine takes in just air, compresses it and then injects fuel into the compressed air. The heat of the compressed air lights the fuel spontaneously.
http://auto.howstuffworks.com/diesel1.htm
__________________
Adam Lumsden
(83) 300D
Vice-President of the MBCA International Stars Section
Reply With Quote
  #14  
Old 02-13-2006, 06:42 PM
TheDon's Avatar
Open Discussion Moderator
 
Join Date: Oct 2005
Posts: 13,208
you can run it on used cooking oil ... ^_^
Reply With Quote
  #15  
Old 02-13-2006, 10:21 PM
1985 300SD Sady's Avatar
Star Crazy
 
Join Date: Sep 2004
Location: Cincinnati, Ohio
Posts: 1,038
Quote:
Originally Posted by rg2098
Adam, I disagree with your above statement. (before this)

Im fairly sure the the fuel is injected right as the piston enters TDC. When the piston is at the top of the cylinder the temperature from compression is the highest. Right then the fuel is injected and explodes due to the temperature of compression alone.

In this way the injector firing combines the ideas of a spark plug and fuel entering the system at the same time.

Isnt that why injectors have to pop at such hight pressure? To overcome that which is in the cylinder?
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 09:43 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page