interesting crankcase pressure problem..thoughts?
interesting crankcase pressure problem..thoughts? ok, so I had a 416 short built by Scoggin Dickey last summer and now have 3500 miles on it. L92 heads, L76 intake, medium size cam. it runs awesome, but I am still having oil consumption problems. It has been getting a little better, but still uses a good half quart every 500 miles or so.
But here is my real concern...I got it out today an ran it around for a while, so it was at full temp. I railed on it in a couple gears and let off....The cloud of smoke behind me would have covered cars to the point they would prob crash cuz they couldnt see. It did it a few times. I looked under the hood, and the dipstick keeps blowing out shooting oil all over. Whats with this huge pressure? its never done that before. It also has always ran very hot. The coolant temp has never gone over 195 but even in 15 degree weather the oil temp stays at 215 even on easy driving. It was up to 250 in the summer with just a couple pulls in 2 gears.
can this all be related? Its driving me nuts and just want the oil burning crap to stop.
But here is my real concern...I got it out today an ran it around for a while, so it was at full temp. I railed on it in a couple gears and let off....The cloud of smoke behind me would have covered cars to the point they would prob crash cuz they couldnt see. It did it a few times. I looked under the hood, and the dipstick keeps blowing out shooting oil all over. Whats with this huge pressure? its never done that before. It also has always ran very hot. The coolant temp has never gone over 195 but even in 15 degree weather the oil temp stays at 215 even on easy driving. It was up to 250 in the summer with just a couple pulls in 2 gears.
can this all be related? Its driving me nuts and just want the oil burning crap to stop.
i dont even use a PCV valve. I just have the catch can ran with regular hose.
one off the intake to the can. the other going to the valley cover.
then off the valve cover I have a breather. should it be different?
one off the intake to the can. the other going to the valley cover.
then off the valve cover I have a breather. should it be different?
Baffle over the opening in the valley cover?
How much oil/how frequently do you empty the can?
Have you done a leakdown and compression test?
Oil temp seems high. [Assuming gauge is correct]
Does engine run w/ high oil psi?
Pull the t/b, and take a look, and see if the walls are wet w/oil.
How much oil/how frequently do you empty the can?
Have you done a leakdown and compression test?
Oil temp seems high. [Assuming gauge is correct]
Does engine run w/ high oil psi?
Pull the t/b, and take a look, and see if the walls are wet w/oil.
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Verdad Gallardo Baffle over the opening in the valley cover?
How much oil/how frequently do you empty the can?
Have you done a leakdown and compression test?
Oil temp seems high. [Assuming gauge is correct]
Does engine run w/ high oil psi?
Pull the t/b, and take a look, and see if the walls are wet w/oil.
How much oil/how frequently do you empty the can?
Have you done a leakdown and compression test?
Oil temp seems high. [Assuming gauge is correct]
Does engine run w/ high oil psi?
Pull the t/b, and take a look, and see if the walls are wet w/oil.
hardley any in the catch can. maybe half inch deep of oil
no, not yet...if its fukked, it just means my rings are crap yes?
its a 2002 C5, was always right when I had the LS1, so nothing has changed as far as the sensor or gauge
oil pressure is perfect. at cruise its about 41 and at WOT it reaches maybe 65-70
its been blowing oil and eating it, so yes the walls in the intake are wet
ill do it when the weather gets better here....i dont understand why the rings would have never seated right...they are C&A rings
Cap off the vacuum port at the intake. I have my valley cover tied to my passenger side valve cover with a breather "t"d inbetween. One small breather on the nipple at the rear of the driver's side valve cover and one large breather on the oil fill neck.
You're still gonna want to check the leakdown as this wont help if you are getting severe blowby around your rings.
You HAVE to get the P in your PCV setup. You HAVE to have positive ventilation, that's why it goes to the TB. Almost any build will consume a decent amount of oil when there is no positive crankcase vent. In the line between the intake and valley cover with the catch can, you need a PCV valve. Otherwise it suck oil straight through the catch can line when WOT and consumption will be high.
To people recommending it, venting to the atmosphere is absolutely not sufficient.
To people recommending it, venting to the atmosphere is absolutely not sufficient.
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yep.. You HAVE to get the P in your PCV setup. You HAVE to have positive ventilation, that's why it goes to the TB. Almost any build will consume a decent amount of oil when there is no positive crankcase vent. In the line between the intake and valley cover with the catch can, you need a PCV valve. Otherwise it suck oil straight through the catch can line when WOT and consumption will be high.
To people recommending it, venting to the atmosphere is absolutely not sufficient.
To people recommending it, venting to the atmosphere is absolutely not sufficient.
Also, you may have run the engine with excessive amts of oil on the cyl walls, long enough that the rings did not seat.
You HAVE to get the P in your PCV setup. You HAVE to have positive ventilation, that's why it goes to the TB. Almost any build will consume a decent amount of oil when there is no positive crankcase vent. In the line between the intake and valley cover with the catch can, you need a PCV valve. Otherwise it suck oil straight through the catch can line when WOT and consumption will be high.
To people recommending it, venting to the atmosphere is absolutely not sufficient.
To people recommending it, venting to the atmosphere is absolutely not sufficient.
I dont like putting that **** back in my intake. I actually just had the tubes welded into my exhaust for a crankcase evac setup yesterday. I am going to go and install the plumbing in a few. I have true dual 3" exhaust with bullets on my car so it SHOULD work well. Everything I've read and every person that I've talked too says that it wont work with exhaust that has any kind of back pressure (i.e. chambered muffler). We'll see.
I dont like putting that **** back in my intake. I actually just had the tubes welded into my exhaust for a crankcase evac setup yesterday. I am going to go and install the plumbing in a few. I have true dual 3" exhaust with bullets on my car so it SHOULD work well. Everything I've read and every person that I've talked too says that it wont work with exhaust that has any kind of back pressure (i.e. chambered muffler). We'll see.
I dont like putting that **** back in my intake. I actually just had the tubes welded into my exhaust for a crankcase evac setup yesterday. I am going to go and install the plumbing in a few. I have true dual 3" exhaust with bullets on my car so it SHOULD work well. Everything I've read and every person that I've talked too says that it wont work with exhaust that has any kind of back pressure (i.e. chambered muffler). We'll see.
I know everyone thinks these systems are the ****, but what works on a race car, does not always work on a street car.