Peugeot 307 2.0 HDI Cleaning of throttle plates and intake manifold

[@emenem_]

It's hard to remove intake manifold and egr valve ?

[@allsknv]

There's practically no access, very little space. To do this, you'll probably have to remove the engine from the cushions

[@emenem_]

Ok thanks

[@CozzaNess]

Did you manage to remove the parts with the engine in situ?

[@allsknv]

@@CozzaNess To clean all soot deposits it was necessary to completely dismantle the exhaust manifold, but there is practically no access, I could not do it, I had to dismantle the engine or do it on a hoist. I only removed the part of the manifold with the two throttle valves. The second damper was stuck due to soot deposits and thus did not open. As it turned out later, the vacuum tube that goes to the turbine broke and thus there was no vacuum to open the flap. The crankcase gas vapor was not produced through the turbine and deposited in the manifold, which is what produced so much soot. That's my guess. I cleaned everything, replaced the tube and the car came back to life, everything works as it should.

[@CozzaNess]

@@allsknvthanks for that. I have a Xsara Picasso 2.0 hdi that has a few issues and I’m convinced it’s gunged up like this but I think the access at the back of the engine is even worse than on the 307! 😞

[@petriukasp]

Are there any issues when its this dirty ?

[@allsknv]

Yes, I had a problem, traction was minimal, the car ran as if it had no turbo. Later I discovered that the vacuum tube to the turbo was broken and thus there was no vacuum in the system to open the throttle. The crankcase vapors were not produced through the turbine and created these soot deposits inside the manifold. The car was bought from the previous owner and apparently he drove it for a long time without fixing the problem, the throttle is jammed from soot in the closed position. I think the manifold and the whole system should be cleaned periodically for proper engine operation.

[@tiredhub3270]

It's unbelievable, that there were so large amounts of carbon deposits.

[@allsknv]

This was also surprising to me ) After cleaning and replacing the vacuum tube that goes to the turbine, the car started working properly. The cause was a broken vacuum tube which prevented the throttle from opening and allowing crankcase gases to flow through the turbine which caused these deposits to form. This is my suggestion. At the moment the car is running as it should.

[@allsknv]

This was also surprising to me ) After cleaning and replacing the vacuum tube that goes to the turbine, the car started working properly. The cause was a broken vacuum tube which prevented the throttle from opening and allowing crankcase gases to flow through the turbine which caused these deposits to form. This is my suggestion. At the moment the car is running as it should.