A Quart of oil a week but where?

[johnk]

I'm losing a quart of oil a week I am assuming it's being burned since I don't have any puddles under my car. I just cleaned the front of the block last week when I did the turbo over and found that the side near the timing belt is oily about 2-3 inches out from the edge and below the water pipe. So I have some kind of leak near there. What would that be though? The turbo line doesn't go near there. My oil and water aren't mixing and compression is good.

I also did a compression check the cylinders came out
1-166
2-160
3-158
4-162

My plugs are white around the anode and diode (those the right names?) but the ring around the outside is black and #2 cylinder is crusty not like metal flakes just caked black.

How can I check if it's valve seals? Could they possibly leak a quart a week

The car is also running the best it has since I got the car cause I replaced the old turbo damn was it cracked all over. I'm only running 12 PSI till I get some fuel mods going. My friend use to complain about getting smoked out when I floored it but I haven't had a comparison since the new turbo I'll get on that soon as possible.

 

[dave99gst]

smoke and or the color of the smoke will tell ya alot..
your turbo seal could be going and burning and/or rings shot , and/or valve seals

 

[johnk]

Turbo is brand new, compression is almost perfect so shouldn't that eliminate the possiblity for rings? How would I go about testing the valves with out ripping it apart?

Also I found a lot of oil in the line for the new MBC I just put in. It would be pretty rediculous to lose a quart a week through the side line on the valve cover I'll try getting a breather for it to help some what.

 

[xcelr8n]

have you considered the possibility of a external leak??
It's not entirely impossible that you could have one, I had a vc leak, that would hardly show itself on the ground, the harder and longer I drove it the more it would leak.
Yet if I didnt drive hard 5-10 minutes before coming home, it might only leave a 2-3 drops of oil and sometimes none on my driveway. I did a compression test like you numbers were 155 across, and I was losing about .5 L every 10-15 days depending on driving.

 

[johnk]

out of the VC? You talking about the viscous coupleing? Isn't that part of the transmission how could I leak motor oil out of it?

 

[heavyD]

out of the VC? You talking about the viscous coupleing? Isn't that part of the transmission how could I leak motor oil out of it?

I think he is talking about the Valve Cover.

 

[johnk]

doh I did just replace the seals on the valve cover and the plug wells and half moon on the exhaust cam. Below the valve cover is clean. Until like I described before below the water pipe and only 2-3 inches out from the t-belt side of the motor.