I turbocharged the 3B II in my 89' BJ73. I had problems with oil leaking past the seals. I thought it was a cheap turbo and rebuilt it. It helped a little but still the same deal. I bought another turbo blaming it on the cheap made in China turbo. My oil drain line is 1/2" straight down to the oil pan and into the side of the pan above the oil. I checked the oil line for obstruction prior to installing the new turbo. With the new turbo there is less leakage, but I still have oil blowing around the seals into the intake and exhaust.
I do have blowby, but I had no problem with oil consumption/burning oil prior to turbo install. I am really not wanting to rebuild/re-ring my engine right now.
My understanding of what is happening is that blowby gasses are blowing up the drain line tube puffing in/foaming up the oil inside the turbo and causing it to blow out the seals. I have no doubt that the oil pressure going in the turbo is greater than crank vapor pressure puffing in . I'm just guessing that the presence of crank vapor pressure inside the turbo housing is pushing out the oil.
I've considered a few different solutions. 1- is to put a elbow inside the pan from my oil dran and run the drain line to the bottom of the pan. In this way blowby gasses will not enter the drain line as it is routed below the oil level. I assume gravity and weight of the oil in the line would still let it drain down. 2-buy a electric oil scavenging gear pump to route the oil return to. This a expensive option to do with 100% duty cycle. 3-increase the size of my crank case vent to 3/4" and run the hose directly to the air filter vent to help take pressure out of the crankcase. My current vent is 3/8" and it will develop a few PSI with the restriction.
4-Final option is to do a "in frame rebuild" with new rings, rod bearings, and pistons if need be......(2 of my pistons are suspect now and I will be doing a compression test soon).
My turbo is a TD04l-13T-6 current fuel setting produce 10PSI max and it is difficult to get it higher than 550C on EGT's.
Any advice/solutions are appreciated.
I do have blowby, but I had no problem with oil consumption/burning oil prior to turbo install. I am really not wanting to rebuild/re-ring my engine right now.
My understanding of what is happening is that blowby gasses are blowing up the drain line tube puffing in/foaming up the oil inside the turbo and causing it to blow out the seals. I have no doubt that the oil pressure going in the turbo is greater than crank vapor pressure puffing in . I'm just guessing that the presence of crank vapor pressure inside the turbo housing is pushing out the oil.
I've considered a few different solutions. 1- is to put a elbow inside the pan from my oil dran and run the drain line to the bottom of the pan. In this way blowby gasses will not enter the drain line as it is routed below the oil level. I assume gravity and weight of the oil in the line would still let it drain down. 2-buy a electric oil scavenging gear pump to route the oil return to. This a expensive option to do with 100% duty cycle. 3-increase the size of my crank case vent to 3/4" and run the hose directly to the air filter vent to help take pressure out of the crankcase. My current vent is 3/8" and it will develop a few PSI with the restriction.
4-Final option is to do a "in frame rebuild" with new rings, rod bearings, and pistons if need be......(2 of my pistons are suspect now and I will be doing a compression test soon).
My turbo is a TD04l-13T-6 current fuel setting produce 10PSI max and it is difficult to get it higher than 550C on EGT's.
Any advice/solutions are appreciated.