Why is there hissing and black smoke from under the front end??
When standing outside and the truck is idling, it sounds like a HUGE vacuum leak and it looks like it puffs smoke down there. Prev owner told me its the oil overflow pipe?
Matt |
Originally Posted by 85_305
(Post 505968)
When standing outside and the truck is idling, it sounds like a HUGE vacuum leak and it looks like it puffs smoke down there. Prev owner told me its the oil overflow pipe?
Matt |
Hissing and black smoke should only ever happen near the tailpipe opening! :scare2:
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Exhaust leak or lots of blow by. How many miles on it?
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It has 255k miles... which isn't a lot for any diesel let alone a Cummins.
So why is it making that hissing noise? Is it normal? I DO have a front cover leak, if that means anything, and as far as I know thats the only place where oil is consumed. How do I test this? It seems to be coming from the rear of the motor, almost where the trans sits maybe. I'll go check the dp real quick ---AutoMerged DoublePost--- Ok so I checked it out a little better, it doesnt dump black smoke or anything, but there is clearly smoke coming out of that rubber tube if you look underneath. I THOUGHT that was whats creating the hissing, but it might be something else. It sounds loud looking under the truck (its snowy; i'm not climbing under), but it's also kinda noisy underhood on the drivers side too. The IC lines looked good, no rot or poor clamping.. wtf is this? |
idk bout the hissing, but the rubber hose is the blowby tube. at 2**,*** miles, u can expect some blowby.
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Yes exactly I can live with some blowby.. no biggie. Just wondering what the hell is hissing, like a vacuum leak (though diesels obviously have no vacuum), and if its normal for smoke to puff out of that line.
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actually you could check vac pump on the front of power steering pump. pretty sure 97s didn't have hydroboost?
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I'm pretty sure this has hydroboost? Though I could be wrong. What's the big purple cylinder thing?
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is it smoke or steam on cold days its steam your seeing from warm ingine air hitting cold air so no worrys
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