gas smell in the oil
Big Kahuna HDF Member
Joined: Feb 2006
Posts: 23,881
Likes: 34
From: USA
RE: gas smell in the oil
ORIGINAL: Twisted Humor
It could be many of these ideas, but I would bet on the rings because of the age of the bike. If the rings are worn then on the compression stroke a little fuel would be forced past the rings into the crankcase.
It could be many of these ideas, but I would bet on the rings because of the age of the bike. If the rings are worn then on the compression stroke a little fuel would be forced past the rings into the crankcase.
Road Master
Joined: Jul 2007
Posts: 966
Likes: 0
From: Panama City, FL
RE: gas smell in the oil
ORIGINAL: KBFXDLI
Yeah but blowby will usually get burned off and only leave microscopic traces of fuel because it occurs while theengine and oilis hot. This guy can actually smell gas in the oil which means he has some serious dilution going on.I had a brand new Sportster that would leak fuel into the oil if you didn't close the fuel shut off valve. Turned out the valve was defective. So, my guess this guyhas a bad fuel shut off valve. Ifthe bikestarts and runs wellI would replace the fuel shut off valve and start using it all the time and just do a few carb cleanings to see if that is the issue.
ORIGINAL: Twisted Humor
It could be many of these ideas, but I would bet on the rings because of the age of the bike. If the rings are worn then on the compression stroke a little fuel would be forced past the rings into the crankcase.
It could be many of these ideas, but I would bet on the rings because of the age of the bike. If the rings are worn then on the compression stroke a little fuel would be forced past the rings into the crankcase.
Just my thoughts while being fully marinated, but someone teach me something when I wake up.
Thread Starter
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Road Warrior
Joined: Sep 2006
Posts: 1,606
Likes: 82
From: nj
RE: gas smell in the oil
I am going to change the oil and filter I am going to use 20w 50 pennzoil in the 84 ironhead just don't want to waste new oil then I am going to put 20w50 harley for NJ weather again to get the rest of it out.I am going to check the petcock by diconnecting the fuel line to see if that is good. I am going to take the air cleaner off the s&s carb and take a look at the carb and the diaphram, needle and seat. just visual, is there going to be anything obvious that I will notice that might be bad? Thanks Charly
Club Member
Joined: Feb 2008
Posts: 18,575
Likes: 4
From: Norfolk, VA
RE: gas smell in the oil
ORIGINAL: 98glider
I have a s&s carb. Does the oil change color Also can the bike get flooded and eventually get blow by. the bike seems to run good. Is there any other test I can do I don't know much about the S&s carb Thanks again charly
I have a s&s carb. Does the oil change color Also can the bike get flooded and eventually get blow by. the bike seems to run good. Is there any other test I can do I don't know much about the S&s carb Thanks again charly
Thread Starter
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Road Warrior
Joined: Sep 2006
Posts: 1,606
Likes: 82
From: nj
RE: gas smell in the oil
You are right. I am going to do that when I get home. I just went to the dealer to get a new oil filter. I also asked his opinion and he said those bike had those problems and he said change the oil and see if the smell comes back.
Outstanding HDF Member
Joined: Jun 2007
Posts: 3,306
Likes: 5
From: Bellville, Tx
RE: gas smell in the oil
ORIGINAL: 98glider
Now the needle in the S&S carb is under the diaghram. Now the seats are located where in the carb Thanks
Now the needle in the S&S carb is under the diaghram. Now the seats are located where in the carb Thanks
Thread Starter
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Road Warrior
Joined: Sep 2006
Posts: 1,606
Likes: 82
From: nj
RE: gas smell in the oil
I am not familiar with the S&S carb I have stosk carb on my98 fxd. So the carbs are different. Can you explain if this can happen that gas can get into the oil Thanks Charly
Big Kahuna HDF Member
Joined: Feb 2006
Posts: 23,881
Likes: 34
From: USA
RE: gas smell in the oil
ORIGINAL: Twisted Humor
I am not trying to be all knowing on the subject, but doesn't the blowby happen on the compression stroke when the fuel mix gets compressed in the combustion chamber, it will blow by the rings into the crank case? It can't get burned off in the crankcase. Now if the oil from the crank case was blowing by the rings into the combustion chamber, then yeah it would burn off. But you would probably have a lot carbon build up in thecombustion chamber.
Just my thoughts while being fully marinated, but someone teach me something when I wake up.
ORIGINAL: KBFXDLI
Yeah but blowby will usually get burned off and only leave microscopic traces of fuel because it occurs while theengine and oilis hot. This guy can actually smell gas in the oil which means he has some serious dilution going on.I had a brand new Sportster that would leak fuel into the oil if you didn't close the fuel shut off valve. Turned out the valve was defective. So, my guess this guyhas a bad fuel shut off valve. Ifthe bikestarts and runs wellI would replace the fuel shut off valve and start using it all the time and just do a few carb cleanings to see if that is the issue.
ORIGINAL: Twisted Humor
It could be many of these ideas, but I would bet on the rings because of the age of the bike. If the rings are worn then on the compression stroke a little fuel would be forced past the rings into the crankcase.
It could be many of these ideas, but I would bet on the rings because of the age of the bike. If the rings are worn then on the compression stroke a little fuel would be forced past the rings into the crankcase.
Just my thoughts while being fully marinated, but someone teach me something when I wake up.
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Big Kahuna HDF Member
Joined: Feb 2006
Posts: 23,881
Likes: 34
From: USA
RE: gas smell in the oil
ORIGINAL: 98glider
I am going to change the oil and filter I am going to use 20w 50 pennzoil in the 84 ironhead just don't want to waste new oil then I am going to put 20w50 harley for NJ weather again to get the rest of it out.I am going to check the petcock by diconnecting the fuel line to see if that is good. I am going to take the air cleaner off the s&s carb and take a look at the carb and the diaphram, needle and seat. just visual, is there going to be anything obvious that I will notice that might be bad? Thanks Charly
I am going to change the oil and filter I am going to use 20w 50 pennzoil in the 84 ironhead just don't want to waste new oil then I am going to put 20w50 harley for NJ weather again to get the rest of it out.I am going to check the petcock by diconnecting the fuel line to see if that is good. I am going to take the air cleaner off the s&s carb and take a look at the carb and the diaphram, needle and seat. just visual, is there going to be anything obvious that I will notice that might be bad? Thanks Charly
Thread Starter
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Road Warrior
Joined: Sep 2006
Posts: 1,606
Likes: 82
From: nj
RE: gas smell in the oil
Thanks kb giving me the time and hopefully it is something simple and explaining to me how it works. I will add cleaner and check the petcock. Thanks Charly also the bike did sit around but for how long i don"t know