oil is getting gone please help

[bigblock79]

ok i got this 84 with a new crate 350 goodwhench. oil is getting gone and it don't leak a drop on payment. the tailgate gets black all over it and the bumper. it is dry sut is what it feels like and the tail pipes are not oiley just black sut. it wips right off and is dry. if you drive it 50 miles on hiway you will put a quart and a half of oil in it if you drive it about 100 mies on back rode. it will lose 2 quarts. the harder you drive the more it drinks oil. it the oil on the tailgate was wet i would know wher it is going. it got a elderbrock carb and a power plus intake the motor is really dry all over it does have a oil pan bolt broke off in it. you can tell a little comes out but not enough to even leak. need help 15$ a week for oil gets high. thanks sorry so long

[C10-Driver]

I have heard that a PCV valve that isn't working will suck the oil out of your engine like crazy. Did you put in a new one when you changed the engine?

[Hoods69BadBowTie]

Damn that don't make no sense that oil has to be going somewhere. Have heard that about pcv valve but theres no way its sucking that much up.

[C10-Driver]

Originally Posted by Hoods69BadBowTie

Damn that don't make no sense that oil has to be going somewhere. Have heard that about pcv valve but theres no way its sucking that much up.

I wouldn't think so either but the PCV is hooked up to a vacuum source and, so I've been told, it will suck the oil right out of your engine.

[j hannah]

I think I would be getting in touch with Mr Goodwrench, something isnt right inside if its going through that much oil.

[Zoomad75]

Pull the spark plugs. Your burning oil if it's not leaking out on the ground. Keep track of what cylinders the plugs came from. If it was truely the PCV allowing it to suck oil, the cylinders that are fed by the runners nearest the vaccum port where the PCV connects should be more oily that the others.

If you only have 1 or 2 cylinders with oily plugs you might have an issue with valve seals or stuck oil control rings on the pistons. Finding stiff/brittle valve seals could lead you to worn valve guides.

While you got the plugs out you might want to go ahead a run a compression test and see if the pressure is on the low side, indicating poor ring seal (or a possible bent/burnt valve). It's pretty basic as tests go, but should give you a general overall statement of health of the engine. If you can, run a leakdown test as it would pinpoint the source of compression leakage if it's rings, intake or exhaust valves.

[rfmaster]

PCV will suck up oil if the opposing valve cover is not ventilated. A typical culprit is due to after market valve covers not having 1.22" holes for vents.

//RF

[knightlife]

soak your pcv valve in some rubbing alcohol, or b-12 chem tool... tap it out with a micro fiber towel, reinstall...if it still doesnt work, put in a new pcv valve, and find out how much oil is being burnt via the spark plugs.

[87rado]

Wow. That is one I haven't heard of. The PCV hoovering oil?
I don't burn or loose much oil. I do have some poor valve seals though. When I first crank it up, I get a puff of white smoke. It's gone in about 5 seconds. Doesn't happen often on warm starts.
I was thinking your rear main seal was contributing, but if it was and the exhaust was burning it off, you would surely notice that.
I think it is good advice to check the cylinders.

I get a few oily spots on my tailgate sometimes. As I mentioned, it looses really no oil. Minor seeping and valve seals. I check the tranny and rear as well. Minor seep on the tailshaft, but nothing obvious.

I was sitting on a patch of dirt one day and cranked it up. I have straight exhausts and both turn down right in front of the rear end. I noticed the big cloud of dust from the exhaust. My brain started working. When I get the spots on the tailgate, it is when I am driving just after rain has started. My exhaust kicks up the oily water off the road and plants it in a swirl right on the tailgate. Mystery oil on the tailgate solved.

[bigblock79]

new pvc and 3 plug was oiley and rest white but lot of them had bulid up i am stump i am the 3 owner of this truck with this promble

[Zoomad75]

Originally Posted by bigblock79

new pvc and 3 plug was oiley and rest white but lot of them had bulid up i am stump i am the 3 owner of this truck with this promble

What color was the build up on the plugs? Black and oily or white and crusty? If you have 3 oily plugs at least, you still are consuming oil. It's either your PCV or something more internal to the engine. Check the PCV (or just get a new one as they are dirt cheap anyway. Change the plugs out, drive it and recheck oil level after you get some miles on it. If the oil consumption is still happening, do a compression test.

I speak from experience. I had a 307 in my Nova that burned 1-2 quarts between tanks of gas. The poor old 307 was just flat worn out. It would have needed a full rebuild to tame it's tendancy to burn oil in addition to gasoline. I stuffed a 350 in it to fix that...

[bigblock79]

3Black and oily 5 white and crusty

new pvc and change the oil and it is till loseing oil the harder you drive it the faster it lose it. iam thanking rings

[Pyrotechnic]

One thing to check is the valve seals. If they are umbrella or positive viton seals, sometimes they will come loose from the guide and start moving up and down with the valve stem. When this happens, the up and down motion causes the valve seal to act like a pump and push oil past the guides.

[Captkaos]

How old is this motor? When was it installed? A few years back there was a batch of crate motors that had issues with rings not seating that did this. Mechanics know about it, Service writers do also, and LIE about it.
I had one just like that. It used 2 quarts in 30 miles! They replaced it under warranty after they tried to blame it on everything they could make up.

There is no way you are pulling 2 quarts through the PCV under normal driving conditions. What does the bottom of the intake look like? What about the carb, it is oily? What about the PCV hose? You can easily check a PCV to see if it works by rattling it. It is just a one way valve.

If you want to verify that oil is or is not coming through the PCV you can put a air compressor oil/water separator inline and see what is coming through the line.

[bigblock79]

from the p[o.s it was put in around 04