peugeot 306 engine trouble

[pa1m3r]

i have a 1998 1.9 dt 306 and i have an oil leak, oil in the intercooler and an unusuall whirring noise at about 2500-300 revs and also back pressure what could the problem be?

[TWR]

Back pressure!! sounds like a head gasket pa1mr3

[cazzz1975]

all cars have a degree of back pressure twr, the whining is your turbo

[pa1m3r]

cazzz1975 the back pressure has pushed the dip stick out though is that normal

[cazzz1975]

that isnt normal, you might have pressure leaking past the valves, try using redex or similar to clean off the valves, its not a major problem

[pa1m3r]

nice one thanks alot

[TWR]

If you have that much down pressure in the sump pa1m3r I think you will find what i have stated, regards that whilling, did the car start to BLACK smoke? If so as said Turbo, The oil you state is coming through the turbo seals.

[pa1m3r]

yeh it did do that qite badly at one point

[TWR]

There are 2 things to look for here, are the pipes to the Turbo Split? are the Circlips tight or maybe loose? Turbos need oil + air to operate there is also a way by right to work the turbo but no-one ever does, when starting cars with a Turbo they should be run for approx 2-3mins to let the oil circulate the same should be done when stopping the car, the turbo should be given time to stop but that's another story, you may be lucky with what you have stated but I will still stand by my statement.

[cazzz1975]

back pressure does not mean you necessrily have a major problem, work out the simple problems it may be before assuming the worst, for example a lot of dipsticks have clips at the base of the handle that if loose can cause the dipstick to rise an inch or so.

you did not mention black smoke, this could be a bad injector, it could be the engine is sooted up or something of this nature.

I would give it a good service, change the oil and filters, redex, give it a good run up the motorway. engine problems are not always terminal and you should try out the cheaper options before you start panicking about major failures.

[dm1982]

possibility that the impeller has collapsed inside the turbo, which could cause back-pressure if the build up of pressure inside the turbo cant get through, if this is the case theres a possibility theres oil escaping through the turbo also. in my experience of back pressure 9/10 time sit does result in a major problem.