'83 300D turbo desiel w/ 236,000 miles & smokes heavy at start up
I have an 1983 300D turbo diesel with 236,000 miles. Motor was rebuit at 120,000 (no valve job then or ever) with new pistons and rings. Car overheated after rebuilt twice due to leaking water jacket from rebuid issues. Car was fine for long time, but started using lot of oil over past 40,000 miles or so. At present, it is so bad that it uses 1 quart per 50 miles of driving. Oddly, it also uses about 1 quart of oil if I have trouble starting the engine and I crank the engine about 8 times with no start. If car starts afterwards, then plume of bluish smoke decorates my house and neighbors. Nice!! I can't imagine bad valve guides or rings can **** up almost 1 quart from this. But, the car exhausts a cloud of smoke when driving. Very bad at start up and for next few miles. Gets better as day and miles go by for the day. Everything repeats next day. Turbo has small play, but ok. No oil in the exhause manifold. Glow plugs are pretty clean exept one has just a little oil. Help, PLEASE!! I don't want another rebuild.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Dark grey/black smoke is excess fuel/ poor combustion. Get a garage to check the turbo function but you don't say how many miles its done so it may need an engine service including things like the emissions control valves etc.
Diesel engines smoke when under a heavy load. Unlike a gas engines, a diesel engine uses fuel that is more like an oil.Smoking is a good indication the fuel is not completly burning because of loaded engine spee. White smoke indicates the fuel is not ignitingefficiently. Truck, boats, tanks abd anything else using diesel fuel will smoke when it gets more fuel than it can use.. Easing up on the throttle will lessen the smoke but not eliminate.. Of coarse if the demand is lessened by applying less loadyhe fuel consumption drops.Not to worry as long as the smoke doesn't attract the EPA.
The reason my audi q7 had heavy smoke was because the diesel fuel injectors were dripping which can be checked by means of a leak test, this was caused by the fuel injection pump depositing micro shreads of metal in to the injectors, 5 of which failed.
If you're problem is the same, you will find that the problem occurs when the engine is hot, when the engine has been ticking over for a short period and then you hit the accelerator the heavy smoke is the excess fuel burning off, equally if the idle period is longer you will notice smoke in you're rear view mirror. Audi are well aware of the common engine faults, proof being in the 3 years or 60000 mile warranty, the only top motor brand that don't offer 3 years unlimited ( Bmw, Merc, lexus, hell kia & hyundi have more confidence), you may think I have been unlucky and landed a bad one, I bought a second one as i thought the same which low and behold i had full injector replacement and £1800 turbo fault. each car developed the faults between 63000 & 77000 miles, if you buy a second hand diesel audi with a 3.0 engine or above you are buying the name not reliability which is proof when you look up audi's on autotrader, there isn't many with more than 150000 miles, the same can't be said about BMW & MERC which have there cars with 250000 plus.
The turbo charger has more to do with rpms than road speed.The turbo uses exhaust gas leaving the engine to push more fresh air into the engine thus creating higher compression and more horse power.You should feel some boost above 1500 rpms if everything is working properly.If not then you should have the system checked by a dealer or a good diesel shop.Good Luck!
check your turbo please.the door in turbo sometimes gets shut or oil cooer goes bad and can result in runaway motor. does it smoke real heavy???? the turbo may be going bad!! try 1st changing oil and fuel filters. if it continues to smoke bad, suggest you take in for service. than you for asking fixya.com!!
It could be a lot of things, but (in general, not specific to this car) it sounds like a 'turbo' problem/turbo air leak. Can you also hear a high pitched whining sound, or something sounding like an high pressured air escaping? Check under the hood for hoses that may have worn through or become disconnected because of busted O-clamps.