I'm having an issue with pushing a lot of oil out of the blow by vent. When driving around unloaded, it's worse than it should be but isn't terrible - it'll fill the 8 oz catch can in maybe 1 or 2 thousand miles. Once it's loaded though, it will fill the can and then start blowing oil all out behind the truck very quickly. I was pulling a car and a trailer this weekend through the mountains of PA and in the time it took to burn 1/4 tank of fuel, I had lost 3 quarts of oil out of the vent tube (And made a big mess of the back of my truck, my trailer, and the car). I don't have any other symptoms, no burning oil, no hard starts, fuel mileage is good, etc.
I built the engine in my truck last year, it currently has 7,000 miles since the rebuild. All rings were gapped to spec and the gaps were set 120* offset from each other. The blow by "test" at idle shows everything is good, it doesn't try to lift the cap from the can at all. I have a 1" hose running from the can to the catch can under the truck, and then 1" hose from the catch can exit venting to atmosphere under the bed. I also have the H&S single turbo kit, which was used when I got it and I was told it only had 50 miles on it.
I'm currently assuming that I have something going on with a cylinder and a compression ring isn't sealing as well as it should for whatever reason. I would think that I would see other signs if that were the case though, especially in the blow by at idle since the keystone rings should seal better as cylinder pressure increases. The only other thing that I can see being the culprit is an oil seal in the turbo allowing boost or exhaust pressure to pressurize the crankcase through the oil drain. I would think that I would see other symptoms if that were the case as well though, like filling the intercooler with oil or burning oil out of the exhaust. My current plan is to run a compression check and see if I can get my hands on an IDS, then go from there. Anyone have any other ideas or suggestions?
Here's the blowby at idle:
https://www.youtube.com/watch?v=uwBhmQI0agg
I built the engine in my truck last year, it currently has 7,000 miles since the rebuild. All rings were gapped to spec and the gaps were set 120* offset from each other. The blow by "test" at idle shows everything is good, it doesn't try to lift the cap from the can at all. I have a 1" hose running from the can to the catch can under the truck, and then 1" hose from the catch can exit venting to atmosphere under the bed. I also have the H&S single turbo kit, which was used when I got it and I was told it only had 50 miles on it.
I'm currently assuming that I have something going on with a cylinder and a compression ring isn't sealing as well as it should for whatever reason. I would think that I would see other signs if that were the case though, especially in the blow by at idle since the keystone rings should seal better as cylinder pressure increases. The only other thing that I can see being the culprit is an oil seal in the turbo allowing boost or exhaust pressure to pressurize the crankcase through the oil drain. I would think that I would see other symptoms if that were the case as well though, like filling the intercooler with oil or burning oil out of the exhaust. My current plan is to run a compression check and see if I can get my hands on an IDS, then go from there. Anyone have any other ideas or suggestions?
Here's the blowby at idle:
https://www.youtube.com/watch?v=uwBhmQI0agg
