Toyota 4 Cylinder TURBO diesel Advice
- Thread starter FourBy4Toy
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- #122
Well after a little time off from Mud here, I have an updated pic of her first trail run, it did great!, I am running average 400 degree egt's, saw them go up to 650 on steep inclines, but quickly go back down to the 400 range on the flats, my only concern was blue smoke, and "surging" at idle sometimes, I think I have eliminated it to a bad oil seal in the turbo(apparently this turbo sat on the shelf a LONG time before I bought it), so I think it may have went south, and rotted?, after wheeling for 9 hours the first night, I was down 1 qt of oil, I refilled it, and noticed a little residue in the boost piping, so it HAS to be that, at least I HOPE so!, otherwise the 10psi of boost is a kick in the pants! it pulls hard, and sounds great, absolutely LOVE this machine!
P.S. I always let it get below 300 degrees before shutoff.
P.S. I always let it get below 300 degrees before shutoff.
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- #125
Well I followed advice on a site I saw, Installing A Turbo On A 1989 2.8 Liter 3L Hilux Diesel Engine - 4wheeling Canada - Off Road Junkes!
And yes the 650EGT's were degrees F I have always read that the more diesel you add, the higher the EGT?
Told ya. They get better the longer you drive it, as you adjust to the torque and power curves of the turbo diesel.
The blue smoke sure sounds like it could be a turbo oil seal. Does it make a big belch of blue smoke after idling for a long time?
Those EGTs sound low to me too, but on the trail you don't have the ability to get the engine REALLY hot. If you were to take it out and drive up a long steep hill (a few miles) I bet you'd be more in the 900+ degree range. Yes, adding more fuel increases EGTs.
You made quick work of that project, BTW. Good job!
Dan
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- #127
I was wondering if I could pick someone's brain here, my problem is that I am getting an intermitten "surge" from the engine(only at idle that I can tell), but immediatly after the surge in the engine, I get a small puff of blue smoke from the exhaust, so that tells me that somehow oil is getting into the cylinder, and causing it to "miss", this will ONLY happen after I have been driving it for a while up at altitude(8000 ft +) on trails, I can let it cool down at home(back at 5000 feet), then restart it, and let it idle in the driveway for hours, and it wont do it, I initially thought/hoped it was just a turbo oil seal, but I eliminated that today while I was out wheeling, and it started to do it again, I immediatly pulled the turbo outlet pipe(the one that comes off the boost side of the turbo to the intake), and proceeded to see if there was oil coming out of the turbo, and I did not notice anything, I had that pipe disconnected from the intake of the engine, and it continued to miss/smoke... I am baffled as to what this could be, I even took the hose that comes off the top of the valve cover(I would assume this is the PCV?), and just ran a "breather" on the end of the hose, thinking that it might be sucking oil from that to the intake, and still no help. I cant think of any other thing it could be!, the engine pulls strong, I dont run any more than 10psi of boost, the engine temp ALWAYS runs about 190 degrees, I just changed the oil, and there was no signs of water in the oil, so I dont think it is a headgasket issue...
I know it is oil being burned somehow, because I had to add a quart after the first wheeling trip when I got home, and checked the oil, knowing it was full prior to the 9 hour wheeling trip.
Anybody have any suggestions? I am open to anything!? Valves?, Valve Seals?, Rings? I am by far no diesel mechanic, but I would think if it were any of those above listed items, that it would not run as strong/quiet as it does.
I know it is oil being burned somehow, because I had to add a quart after the first wheeling trip when I got home, and checked the oil, knowing it was full prior to the 9 hour wheeling trip.
Anybody have any suggestions? I am open to anything!? Valves?, Valve Seals?, Rings? I am by far no diesel mechanic, but I would think if it were any of those above listed items, that it would not run as strong/quiet as it does.
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- Thread starter
- #129
Yes it makes big belches of blue smoke, but not necessarily after idling for a while, it is after wheeling(not extremely hard), then pulling over to stop for a few minutes on the trail, then I will notice it having the intermmiten "miss" / hicccup, then a burst of blue smoke will immediatly come out the exhaust, it will continue this until I shut it off, however, if I start driving again, I dont notice the miss, or blue smoke while I am driving(maybe I just cant notice it because the black smoke is overpowering the blue smoke?), but then again I dont feel a miss in the powerband either.
And thanks for the compliments, me, and 2 other friends did a lot of quick work to get this ready to wheel for this Labor day weekend, and get a few trail runs in before winter gets here!
Mainly it was a couple buddies, 1 being the wiring guru, and the other being my fab/welder friend.
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- #130
The probe location is about 3 inches from the turbo on the downpipe, no photos right now, but I can get some, from what I have read my highest of 650F is not really off key, that was only when I was into the boost, going on a pretty steep incline for probably 1/8 mile, then when I summited that hill, it went back down to the 400F range.
Those post turbo readings are not that accuracy .. but 900°F post turo seems to be ( IMOP ) a reasonable conservative number ..
It's cold where you are .. how much . ?
When was the last time did you check the IP and injectors . ?
It's cold where you are .. how much . ?
When was the last time did you check the IP and injectors . ?
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- #132
When we did the trail run, it was in the 70's F, I am not really sure how to check the pump/injectors?
Are there oil seals inside the IP?, that could possibly somehow leak oil into the fuel stream?
diesel lab can chec your injectors and IP ..
My 3L (from soshin, like you) has gone 6,000 miles so far, and might lose less than a pint between changes. 10 psi boost and I get ~ 400 to 600°F (post turbo) with moderate driving, it goes a hair above 900°F when I push it up hill on the highway. Absolutely NO smoke, of any kind. I want to put the 2LT pump and injectors on it to take advantage of the boost compensator. I would up the fuel volume, but right now it runs a bit on the hot side on the highway. Got a new aluminum radiator coming soon to cure that problem.
Perhaps vent or catch-can the valve cover vent-hose, and clean the hell out of the intake pipe (turbo to intake) and see if it gets oily after a run. If that's clean, comp. test. if that passes, i would guess valve guide seals. the surge in idle sounds like crankcase oil is being burned in one or more of the cylinders. Stuck ring(s)? Not to be a party-pooper, but myself, I would diagnose this problem sooner than later. too much oil gets past and the engine will "run away" burning crankcase oil as fuel. The 3L only has a fuel-cut solenoid and nothing to block the air when the key is in the "off" position. i.e. it will keep running regardless of the key or fuel, and keep running faster and faster until it siezes, or throws a rod.
Your thermocouple is too far away from the turbo outlet. Drill a hole and weld a bung on the elbow so that the point is as close to the turbo-out as possible, and make sure the end of the probe is dead-centre in the middle of the pipe.
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- #135
I have tried just venting the pcv, and it still does it, I did a compression test, the numbers looked great, plus they were within 20 psi of each cylinder, so I am thinking like you either valve guide, or ring, but I would think that with a ring, wouldnt it do it all the time?, and my experience with valve guides seals is that it usually only blows blue at startup, not intermittenly after it gets warm?
I have tried "Rislone" treatment in the past with ticking lifters, and it worked great for me, so I am trying this in conjunction with some lucas injector cleaner, and will take it out for a run this weekend, and report back!
I have tried "Rislone" treatment in the past with ticking lifters, and it worked great for me, so I am trying this in conjunction with some lucas injector cleaner, and will take it out for a run this weekend, and report back!
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Not sure, it might depend on how bad the valve guide seals are, but that usually is the norm with bad guide seals (blue on start, clears when warm). Take off the fuel filter, empty it and fill it with sea-foam. Maybe it's just snake-oil, but I do this on all my units when changing the fuel filter.
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- #138
Well I did the Rislone, and Lucas injector cleaner, and it is a little better, smoked/puffed/missed a little less, and didnt use as much oil, maybe I am on the right track to unsticking something
Perhaps it is a stuck ring.
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- #140
God I hope so!, otherwise everything else about this rig is a kick in the pants!