Help Diagnose My Motor, Is it blown?
flexer
11-25-2010, 07:57 PM
SO here goes.....
The motor appears to be running really well, but I have to add a quart of oil to it every 200 miles. So basically every time I fill up. It is burning A lot of OIL. When I first start the car up and it is cold, oil will spit oil out the exhaust for a little. Once it is warmed up it stops. Other than that it doesn't smoke or anything. When I am driving it or am on it HARD no smoke, but when I get off the gas after a hard pull it will smoke a little and smell like burning oil then stop once I get back on the gas.
Compression test yielded:
135, 133, 135, 132
There is A LOT of crankcase pressure I believe.....I checked the PCV valve connected to the intake and it works fine. No leak there when I blew on it, it closed up and when I sucked it opened. The other line I have going to the factory oil separator and then the other side I have going to my intake pipe right infront of my turbo. When I removed that pipe and filter to store the car for the winter I looked in and the turbo wheel was COVERED in oil. YUM! So I then go to take my spark plugs off to do the compression test and cylinders 1 and 3 spark plugs are CAKED in oil. All over the threads and the tips of the plugs look funky.
I'm stumped though. I thought for sure the rings were toast, causing excessive blow by and therefor the burning of 1 qt of oil and the excessive crank case pressure......but the results where not half bad right, and the car doesn't smoke when I drive it, only when I let it engine break itself? The only thing I can think it is, is the valve stem seals. But could I really be burning THAT MUCH OIL with just valve stem seal problems? And it really only looks like I am leaking on cylinder 1 and 3, but those two had the highest compressions.....
but wait.... maybe there is oil down in the cylinder giving me the higher readings which is skewing my results?!?!?!?!http://www.freshalloy.com/forums/images/smilies/classic_FA/confused.gif
As you can see I'm lost
The motor appears to be running really well, but I have to add a quart of oil to it every 200 miles. So basically every time I fill up. It is burning A lot of OIL. When I first start the car up and it is cold, oil will spit oil out the exhaust for a little. Once it is warmed up it stops. Other than that it doesn't smoke or anything. When I am driving it or am on it HARD no smoke, but when I get off the gas after a hard pull it will smoke a little and smell like burning oil then stop once I get back on the gas.
Compression test yielded:
135, 133, 135, 132
There is A LOT of crankcase pressure I believe.....I checked the PCV valve connected to the intake and it works fine. No leak there when I blew on it, it closed up and when I sucked it opened. The other line I have going to the factory oil separator and then the other side I have going to my intake pipe right infront of my turbo. When I removed that pipe and filter to store the car for the winter I looked in and the turbo wheel was COVERED in oil. YUM! So I then go to take my spark plugs off to do the compression test and cylinders 1 and 3 spark plugs are CAKED in oil. All over the threads and the tips of the plugs look funky.
I'm stumped though. I thought for sure the rings were toast, causing excessive blow by and therefor the burning of 1 qt of oil and the excessive crank case pressure......but the results where not half bad right, and the car doesn't smoke when I drive it, only when I let it engine break itself? The only thing I can think it is, is the valve stem seals. But could I really be burning THAT MUCH OIL with just valve stem seal problems? And it really only looks like I am leaking on cylinder 1 and 3, but those two had the highest compressions.....
but wait.... maybe there is oil down in the cylinder giving me the higher readings which is skewing my results?!?!?!?!http://www.freshalloy.com/forums/images/smilies/classic_FA/confused.gif
As you can see I'm lost
MagicRat
11-25-2010, 09:02 PM
Well, lots of crankcase pressure means bad rings and/or a cracked piston. The oil smoke symptoms you describe are classic worn valve guides. So, I hate to say it, but I think you have an entirely worn engine. :(
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