7A-FE burning oil Options

[metaldude19]

So my 95 ST had a rod knock and was burning oil so I figured I'd do a full rebuild. I replaced the pistons, rod and main bearings, and new rings. The the engine was over-bored to .50mm and the crank to .25 over-bore, which called for bigger pistons and bearings. I followed Smaay's rebuild thread. Everything looked good. So once the rebuild was done I cranked the motor and it turned on very quickly. And for the first 700 miles I noticed the oil level wasn't changing so I thought it wasn't burning any more oil. But then when it was at 1,200 I checked the dipstick and it was missing about a quart. I've changed the pcv valve and its still burning oil. I opened up the intake manifold cover and its full of oil. I don't know what else to do. I'm thinking Im gonna have to throw away a lot of money and just get rid of this motor and get a used one that will hopefully not burn any oil. Anyone have any suggestions as to what I should do? Car runs perfectly fine, its just that it burns oil. I did a compression test and it reads a little over 160 on all cylinders. No leak down test has been done yet.

This post has been edited by metaldude19: May 17, 2012 - 11:30 AM

[Smaay]

hhmmm sounds like you did everything right. my first guess would be the PCV, is it possible you have the hose routing wrong and still pressurizing the crankcase?

[metaldude19]

hhmmm sounds like you did everything right. my first guess would be the PCV, is it possible you have the hose routing wrong and still pressurizing the crankcase?

I did everything from a full head rebuilt along with the bottom end. I'm bot home right now so I can't check my car, but I took several pictures of all the hoses and made sure I put them back exactly how they went. Im almost to the point of saying screw it and just buying another motor. But that's a lot of money going to waste.

Yes
Atleast one of those is a breather for the valve cover
An you have to have that vented to make sure you dont get to much pressure builtup under the vc
might want to change out the pcv valve again
New doesnt always mean good

You NEED the pcv, not only releases pressure(i removed mine for a month, oil pan started leaking), but it actually helps keep your oil clean by venting out the little bit of gas the gets by the rings and water the can build up over time.

I'll go ahead and check it out tomorrow morning and keep you guys updated on what's going on.