94' 850 Turbo giving off blue smoke

Hi, blue smaoke at your exhaust at start and idling looks to me as oil consumption. At start the engine is cold so there is a lot of space between the parts of your engine and when idling the becomes a vacuum inside wich sucks the oil in. For older cars this is completey normal and there might be oil sucked in between the valves and their housing There is a rubber cap closing the space between the valve and its housing, its placed inside the valve spring so you have to remove all valves which is quite a job :) (if other native english speakers read this and your a car mechanic then you know what I mean, so please explain further). You can ask your local volvo garage about this and find out what it costs to fix it or maybe a specialized company can fix it for you. Good luck!

a proud 480 driver

My 94 850 turbo has had a rough start/ no start condition and smoking when it did start with misfires. I replaced cap, rotor, plugs, fuel filter, ignition coil, tried a different ECU and fuel pump relays, only to find that my spark plug wires were shorting to each other due to failed insulation. Waiting on new wires now. You can get those headlight lenses on ebay for @$6o a piece and easily change them yourself.

Mathieu Paardeko> Hi, blue smaoke at your exhaust at start and idling looks to me as oil > consumption.

Thx.... Ill give it a try...

Hi,

The two worst things it could be are the turbo and the rings.

To check the turbo, remove the hose that comes from the turbo and goes to the intercooler. Check inside for the presence of oil. If it is oily the oil can only be coming from the turbo so that could be pricey and may fail suddenly. If it seems dry then the issue is most likely to be either the piston rings are shot (but that tends to exhibit itself more as oil on acceleration), worn valveguides or guide seals (tends to show as oil after long period on idle or on overrun such as at teh botom of a hill when you accelerate again). High crankcase pressure (worn rings or blocked crankcase breather) can also cause blue smoke. As long as it isn't the turbo it is unlikely to fail suddenly so just keep going!