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Discussion Starter #1
bout 2 weeks ago i changed my fuel pump because it was spitting out oil. about 2 weeks before that, i changed the oil and oil filter. was disgustingly black and sludgy. anyway i just changed it again, and this time its just as black as what it was last time, but this time it has a light fuel smell to it, didnt notice if it had that smell to it last time as there was a lot of wind around.

anyway, after seeing the color of the oil, ive decided to change it again in a week or two, and repeat that until it stops coming out black... but what i want to know is if i should be changing the filter every time too, only every second or third time, or to just leave it. and would the fuel smell just be residual from the old pump leaking, or is there a chance i stuffed up putting it on? doubt thats the case because it was pretty straight forward, but thats the first time ive ever changed one...
 

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It's a very good thing that you changed again. The fuel pump was leaking into your oil is why the smell. As for me, I change every three thousand and do the oil and filter. It's not much more in cost to just replace the filter each time. My engine has a lotta miles and some blowbuy. I also just use the super tech filter from Wal-Mart.
 

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fuel pump..

STOP! DO NOT DRIVE YOUR SAMURAI ONE MORE FOOT!

Your fuel pump is dumping fuel into the crankcase and, in your case, is LITERALLY washing the internals of your engine! That is why your oil looks dirty - even after a short time of operation.

As the fuel thins your oil, the oil loses it's ability to lubricate parts properly and suddenly your engine (crankshaft bearings, camshaft bearings, piston knuckles, EVERYTHING!) starts to disintegrate from excessive wear!

Check your dipstick for the "appearance" of more oil to prove that you have a fuel pump leak.

You need to IMMEDIATELY replace your mechanical fuel pump. Be VERY CAREFUL when installing the new one that you do not bump the pump lever on the back side of the pump and cause the new fuel pump's pumping diaphragm to be damaged.

You should turn the engine over CLOCKWISE by hand (use a 17mm socket on the front of the crankshaft with the sparkplugs removed) until the fuel pump pushrod retracts into the head before installing the pump. You will have to push the rod in as you turn the engine as the pump lever pushes it back when installed. This will eliminate any pressure on the diaphragm by the pump rod as you install the pump.

Also, DO NOT BLOCK THE BREATHER TUBE WITH ANYTHING! Doing so makes the pump work harder (and thus causing damage again) as the air behind the diaphragm has nowhere to go when displaced during each pump stroke.

See the following link for a pictorial:

Ack's FAQ Samurai 1.3 Mechanical Fuel Pump Symptoms - Gasoline and Oil Leaks at Vent Tube

Also, ALWAYS change your oil filter when you change the oil. It's less than $15 (possibility less than $10). Doing so removes all existing dirty oil while giving you a new, clean filter element. Oil changes shops do it, not to rip you off, but to actually make your engine run longer - not to mention that the owner's manual reccomends it too.

You can't imagine how much I hope that this helps you!
 

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Discussion Starter #5 (Edited)
i only just changed the fuel pump 2 weeks ago... are you telling me i payed $200 for a pump thats now broken???

i changed the oil a month ago, then 2 weeks after that i changed the fuel pump, then 2 weeks after that i changed the oil again... time frame might be shorter, but u get the idea... is there a chance it just still stinks like fuel from the old pump still, and i just didnt notice it the first time i was changing the oil?
 

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Sorry, usually one would change the oil at the same time as the fuel pump because of the compromised oil. Thought that you meant the new oil was full of fuel.
Run it for a few days and then check the dipstick for a gas smell. Should clear up.
 

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Discussion Starter #7
well im going to change the oil and filter again in a few days, see what happens from there. but if the diaphragm was damaged, wouldnt the little vent tube be spitting out oil or fuel? cz its not...
 

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Since you haven't changed the oil yet, the pump is probably not to blame for the fuel in the oil. So the pump is probably fine. The sooner the better for that oil change though. The gas in the oil is degrading your seals.
 

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I agree with Billjohn.

I did not understand that you did not immediately change the oil when you replaced the fuel pump.

I hope everything works out okay!
 

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Discussion Starter #10
ok so its been 3 days since last oil change, and i did it again today (oil filter was too tight and i dont have one of those tools, whatever its called- gunna get one tomorrow)... but the oil is rather dark colour again, and still has a fuel smell to it, but not as strong. could it still just be residual smell, or is my new pump f****d? im gna change the oil AGAIN tomorrow, and this time the oil filter too, see how it goes...

the little vent tube isnt spitting anything out of it, but does that mean its ok?
i just want this problem to be fixed and gone...
 

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If the engine is running fine and you are not getting anything out of the barf tube then you should be good. I would try to get that filter changed though. If you were still getting fuel in the oil it would be thinning it out. An oil change would seem more like a flush (using the flush junk that washes out the block). If the oil is still thick (like oil should be) then you are just cleaning out the gunk. No matter what the commercials look like, if you run a few hundred miles on new oil it will darken up...
 

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Discussion Starter #12 (Edited)
ok so a further two oil and oil filter changes later i am still getting a very strong fuel smell in the oil. im sure the "barf tube" hasnt been spitting anything, but theres obviously a problem. any ideas? faulty fuel pump? another issue elsewhere?
its also running a little bit warm... driving in cool weather last night it was up over the halfway mark on the temp gauge, it usually doesnt go over a third...
 

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Discussion Starter #13 (Edited)
anyone?? i need my car fixed cz i dont have other transport :( was considering getting the carby rebuilt as i heard thats another possible cause
 

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if the carb is over-fueling the engine, it could be washing the cylinder walls. That's really dificult to do without a serious preformance carb or fuel injection. If your temp is going up it could be from the oil breaking down from gasoline contamination, or you could be getting excessive blowby into the crank case heating up your oil and leaving carbon deposites and making it smell like exhaust. Have you noticed any excessive oil in the air filter canister or backpressure blowing out your dipstick tube while the engine is running? Several things could cause excessive blowby, Could be the timing is off, sticking or dammaged valve, or the cat could be blocked up.
 

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Discussion Starter #15
just checked, there is a bit of oil in the air filter box. not lots, but thats still more than it should be. GREAT!!... whats most likely problem?
and yea i thought that the temp would be up due to the fuel in the oil... tryin to get lifts off everyone so i dont have to drive it...
 

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If it's getting blow by into the crank then it could be anything from your rings to backpressure in the exhaust. I had that problem but much more severe. In my case I had adjusted my valve lash incorrectly and it was causing considerable crank case pressure. I took mine in to a mechanic because I thought I busted a valve or my rings were toast, but he said the valve train and engine were in great shape, my valve lash was just off.
 
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