finally got my 93 fd on the road
 

I had my stock turbo rebuilt by B & D Fuel Injection Service, INc. Had it in about a week with less than 100 miles, and it is now leaving out blue smoke when it starts in the morning after sitting over night. After it warms up it doesn't smoke as much. It is still leaking from the duct that goes to the intercooler and dripping on the manifold. When I got it back from the rebuilder it had probably as much side play as it did when I sent it our for repair. My question and I have heard this many time before, and I have looked at all the threads is just how much smoke is permissable. Does your turbo perform like this. It seems to have good boost. when I punch it. It reads about 20 units of vacuum, and goes up about 10 psi boost. Should I contact the rebuilder to have it returned for repair. Any advice will be appreciated. I am getting near the point of giving up and selling this car that I have had for 13 years. I bought it new.
jimbo sage

Yes, I would call Gibby for an explanation about they turbine play and that you suspect leakage. He does warranty his work.

But I'm wondering about the installation. Can your mechanic verify where are the leaks are coming from?

Blue smoke couldn't be good. Have you hooked up with dgreesman yet? I'd take him up on his earlier offer.

When I first start it up it will emit blue smoke until it warms up. I called Gibby and he told me to check the crankcase pressure. I did that and found no suction or pressure when removing the oil fill cap. The car runs pretty good, however I don't think it is boosting the way it should. On my boost gauge I read at idle around 20 on the vacuum side and it never goes over the 0 marking on the gauge. Should it not read over the 0 side? I will eventually have to take it to the gentleman in Allentown to see what he thinks of it. The smoke is not anywhere near what it was before the turbo was rebuilt. I will also probably call Gibby again.
Thanks for your response.

my autometer boost guage reads -20 (in-mercury) at warm 900rpm idle and anywhere from -20 to 13psi while driving. typical acceleration the boost goes to about 4psi. If I depress the pedal further I can get 10-13psi.

should only read over the 0 side to psi if your turbo spool develops enough psi to over come the vacuum intake capacity and buildup pressure hence the psi reading, I think. which happens for me only when my foot is heavy on the accelerator.

oil pressure, I do recall a conversation with Gibby about that. He says too much oil pressure will cause seals to fail, which made sense to me. So i think the questions are does your car develop too much oil pressure within the turbo housing to allow internal leakage? is the oil pressure produced permissible?

my stock oil gauge reads low bouncy pressure at warm idle. under drive pressure it sits about 10 o'clock.

Is your intercooler filling up with oil? are you leaking oil externally? or are you loosing oil because your OMP adding to much oil to your fuel mix?

revisited my oil pressure readings from my stock oil pressure gauge on the way to work. at start up it will shoot to 80 psi momentarily. at idle down to 10psi. while cruising at 50 psi. At 5psi boost it went to slightly above 60psi which is probably the reading you are most interested in. Didn't have the car comfortably warmed up to push it any harder as I was just about done with the trip.

are your readings silmilar?

i recall that you may have had your engine redone too? how many miles have you had since your fuel injectors been cleaned? I'm wondering if you are lean on fuel.

My oil pressure on start-up goes 60 psi and when accelerating reaches around 120. Before I had the motor replaced with a rebuild I was barely getting any readings due to the defective sending unit. I had the shop replace it and it is working ok now. The blue smoke that is emited from the tail pipe when starting does not last very long. The car seems to run pretty much ok, however I am not sure of the boost, my gauge does not seem to be working correctly. After shutting the engine down it retains about 10 inches of mercury. I need to check it with my mity-vac gauge. When I talked to Gibby, he explained that the type of seals that are used are the piston ring type. i suspected likewise due to the heat produced in that area. regular type of seals would not withstand the heat. The smoke is blue in color, therefore it is not running rich. I just didn't think that a good turbo would leak oil past the seals. The boost gauge that I have installed is a autometer and seemed to work good when I installed it on the old engine. Since the new engine was installed it works different. When you floor your accelerator pedal when the car is in motion does the gauge go beyond the zero at the top center. Mine doesn't seem too.

Thanks for your input

I have never had my fuel injectors cleaned.

A rebuilt turbo should not leak oil to the point of dripping. Possibly enough to keep the inside of the pipes moist, but stock turbos with 50k on them will often not leak enough to form a full drop.

Dave

anyone, Is this oil pressure high?


Re: injectors, usually mechanics don't service them (or check the other parts like pcv, check valves, diaphrams, solenoids, etc.) upon rebuild.

I've thought that 30,000 was enough miles to go between cleanings. I've found injector imbalance after 15,000 miles, what happened was my fuel filter was found to be dirty, so I sent the injectors to RC engineering for cleaning and mapping.

some theorize ( and I buy into it) that poor performing injectors are a main cause of blown motors. (1.detonation; 2.temperature diff. and other problems caused by one rotor running rich the other lean )