Question about 1993 Isuzu Pickup

3 Answers

Oil leak Under the intake manifold there is a little white pipe that looks like somethingshould be attached but there isnt and when the truck rev's it spits out oil. what should be attached if anything or is thisan overflow of some kind?

Posted by mdelaney911 on

  • dingo_707 Aug 26, 2008

    I have the same problem I believe. The line comes out under the starter I think and then just runs to the ground all the time . Cannot figure out where it is supposed to hook up. The person I bought it from said he disconnected it cuz it kept getting clogged and does not know where it went.

  • wwwyzzerdd Dec 05, 2008

    was wondering about this when i noticed it in my 92 isuzu pup, it was running but real sluggish and you would have to ease on the throttle and slowly raise the rpms in the engine, if you hit the throttle too fast it would choke and die, it did that for a while then it stopped running period, i thought it might be the float in the carb so replaced that and cleaned the carb out, didnt help, acted like it wasnt getting any gas, so i checked the fuel filter, blew it out and found rust, pulled out the gas tank cleaned it out with some pool cleaner got it real nice and shiny inside, replaced all the rubber fuel lines going to the tank, put 3 gallons of fresh gas in it, and tried to start it, big let down... anyways, got a friend of mine to try to start it while i looked under the hood, and i noticed that everytime the engine would turn over it would shoot oil out of a hose coming from the fuel pump onto the ground, well since i thought the fuel pump might be the problem here, i went ahead and pulled off the fuel pump, basically, im not getting any gas to the engine.. or to the carb, no fuel going through the lines at all, and no gas came out of the fuel filter when i blew it out, so its not sucking gas at all, and the pump is shooting oil out of that hose onto the ground, any thoughts on this? anyone?

    thanks

    -steve

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Anonymous

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This is a maddening problem if you don't know what's going on. If it's like my 92 isuzu pickup with 2.3 litre engine, it's a vent line coming out of the fuel pump which will spit oil out. I had a very hard time figuring out why but finally read that there is a galley in the block where oil runs back to the oil pan. If it gets clogged, oil will come out the vent line of the fuel pump. I even took my head off and tried blowing compressed air and sticking various wires through the block holes near where the fuel pump mounts. Nothing did any good and I was sick of the leaking oil and having to add oil so I bought several feet of oil resistant hose at autozone and routed it from the vent line, back over the engine, and into the dipstick tube. This worked like a champ. No more leaking oil. No more adding oil. Make sure you trim the outside of the hose where it goes into the dipstick with a razor knife or similar, so it will fit tightly. Make real sure you use oil resistant hose or it will break down and get into your oil. Not good. Then use a tie wrap to secure the hose to something else like the brake vacuum hose to keep it in place. I keep my dipstick behind the seat and make sure it's cleaned before and after checking my oil. This truck doesn't use any oil to speak of now and I wish I'd thought of this sooner. Short of removing the engine and having the block flushed and cleaned I don't know what else would have fixed this problem.

Someone else said to replace the fuel pump to fix this problem. I tried that. It did not work. It still spat oil out the vent tube to the tune of about one quart every 150 miles.

I also replaced all the engine seals and gaskets. Front and rear main seals too which were also leaking. So now my oil leaks are a thing of the past. Good luck!

Posted on Oct 12, 2008

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