Smoking problem
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Smoking problem
[updated:LAST EDITED ON 11-Feb-02 AT 05:59 PM (EST)]I just put an Edelbrock 4 barrel on my 73 F 250 4X4, 360 cu. I had to swap intakes as well, putting on a stock intake from not sure what year truck 360 cu. It looked the same accept for the vacuum in a different place. Now I have a smoker! It is the worst after decelleration. Meaning I can hold the rpm up at lets say 2000 and it isn't too bad. But when I take foot off gas, it bellows out some nice oil smoke. It also has smoke coming out of the filler vent on the valve cover. It is smoking out of both sides of motor, but worse on one than the other. I do have true dual exhaust, thats how I can tell that. Also, it doesn't start smoking right away, it smokes after it has been running a few minutes. Any ideas or even quick easy solutions? I figure some thing must be wrong with the intake, or I bent a rod or something.
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From: Gainesville, FL
Smoking problem
Tal,
You are describing an intake vacuum leak. As you let off the gas, vacuum increases in your intake manifold. The leak is between the manifold and the head. The leak is on the bottom side of the manifold and sucks oil from the lifter valley. It is quite a dramatic sypmtom and resembles a fighter plane going down in flames. Try removing the front and rear manifold seals and using a 1/4" bead of silicone. This will allow the manifold to sit down lower and hopefully seal.
My Way is the Highway
KingFisher
You are describing an intake vacuum leak. As you let off the gas, vacuum increases in your intake manifold. The leak is between the manifold and the head. The leak is on the bottom side of the manifold and sucks oil from the lifter valley. It is quite a dramatic sypmtom and resembles a fighter plane going down in flames. Try removing the front and rear manifold seals and using a 1/4" bead of silicone. This will allow the manifold to sit down lower and hopefully seal.
My Way is the Highway
KingFisher
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Smoking problem
thank you for the info, which makes sense. but I was looking for an easy fix, not one that I have to re-do the whole job, geeze. I'm starting right now, I'll let you know how it goes...
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Smoking problem
I just took the mess apart and the situation is the intake manifold gaskets only seal maybe 1/8 inch or less at the lower side of the ports. The raised ring on the gasket was not even touched at the bottom. These gaskets are a joke. The port hole on the gaskets are a half inch bigger than the ports on the motor. They are the correct framco gaskets! I found some gaskets for a 390 hi po car motor that will seal the manifold. This is crazy, I'm I really the only one who has had this problem?
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Smoking problem
so hey, check this out. I noticed right before I put this back together, the 4 barrel intake I put on is not correct. I put it on any ways, thinking it shouldn't matter, but I still have smoke. The difference is the inlet to the intake other than the inlet ports. there is one on each side and they look like exhaust, but not all black. I figured that it is just a bit of blow by in order to help heat the intake manifold. How do they actually work. The ones on the new manifold do not match these extra ports on the head. Could this be my whole smoking problem? I just about have all the bolts required to hold the top end of my motor together named now. I'm going in again tomorrow. I just wish I knew what the freaking problem is. The intake manifold is a problem, but is it THE SMOKE PROBLEM? There is no smoke at an idle now, just while under power.
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Smoking problem
[updated:LAST EDITED ON 15-Feb-02 AT 01:50 PM (EST)]you need to cheack out the thred a little under this that says intake question or somthing like that it says somthing about intake sounds like you are going through the same thing wrong intake
mike l
it says intake manifold? cheack it out
mike l
it says intake manifold? cheack it out
