oil problem
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Senior User
Joined: May 2002
Posts: 298
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From: Denver
oil problem
I have just fired up my rebuilt 302 and I have a rather large quanity of oil comming out of the headers (both sides) this is being some what burned from the heat but it not all of it, still being sprayed all over the bottom of the truck and the floor. Any ideas where the oil is comming from. I do also know the my oil pressure is droping to about 10 psi at idel. Any help would be great.
Robert
72 F100 Ranger XLT W/ 86 5.0L EFI W/ AOD
www.geocities.com/krazdndenver
Robert
72 F100 Ranger XLT W/ 86 5.0L EFI W/ AOD
www.geocities.com/krazdndenver
Senior User
Joined: Aug 2001
Posts: 212
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From: Wimberley, TX
oil problem
My first 'guess' would be it is leaking out from the bottom edge of the valve covers down onto the headers but I bet you have already checked that. As for 10 psi @ idle, that isn't all that bad assuming you get up to 30 or so off idle.
I don't have any other ideas.
I don't have any other ideas.
Posting Guru
Joined: Dec 2001
Posts: 1,668
Likes: 3
From: Lincoln USA
oil problem
When you had your engine rebuilt did you have the heads or block shaved? It's possible that they are not perfectly flat, and your head gaskets are not sealing properly, allowing oil to escape.
Do you have any oil in your coolant or vice versa?
And my 390 makes around 10 PSI at idle, so like was said if it comes up to around 30 under load it's fine.
Do you have any oil in your coolant or vice versa?
And my 390 makes around 10 PSI at idle, so like was said if it comes up to around 30 under load it's fine.
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Senior User
Joined: May 2002
Posts: 298
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From: Denver
oil problem
I built the heads in school. I but bronze guides in, positive control oil seals on all valves. Also new manly valves and new hardened seats in all the exhaust ports. I laped the valves and then leak tested them. I measured the for warping and found .001 on both the heads and the block.
I think that it is leaking intake manifold gaskets, sucking the oil into the intakes? But any help is great.
Robert
I think that it is leaking intake manifold gaskets, sucking the oil into the intakes? But any help is great.
Robert
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Senior User
Joined: May 2002
Posts: 298
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From: Denver
oil problem
I found the problem. There is a frezze plug in an oil passage that is in the rear center of the block. The machine shop I took the block to to get that work done must have removed it and I didn't know one went there till I went to the junk yeard and tore apart an engine. After putting the plug in my oil pressure went from 10 psi to 50 psi- o yea
. So here is something to remember if you rebuild a 302. I will get it up and running and broke in tommaro
Robert
. So here is something to remember if you rebuild a 302. I will get it up and running and broke in tommaroRobert
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