Re: Cuidados com um motor turbo
Enviado: Sex Jul 05, 2013 11:21 pm
Era isso mesmo que tava falando a respeito! hehehe
A consequencia sao meio graves, seguem as citações e o link pro pessoal ler :
Due to the THP engine being direct injection, i.e direct into the cylinder, and the way the PCV (positive crankcase ventilation) is laid out, a lot of oil haze gets sucked into the combustion chamber, past the valves and is burnt.
Well, that's how it's supposed to work!
In reality, this oil haze can cause numerous faults to standard engines, and any remapping or free flowing air filter arrangements can magnify the problems.
The 2 main problems are:-
1. Oil carbonising around the intake valve, which causes very rough running (which happened to Stef in his DS3R) which then requires the dealer to spray a special solution to dissolve this carbonisation (there is an info rapid)
2. When shutting down, because of vaccums within the engine and the layout of the rear PCV pipe, oil is left to collect in it, and when starting, assuming you drive easily until warm, is still sitting in the pipe because of the Valvetronic valve system on the THP engines, which under light load only partially opens the valves. Then, under harder acceleration, this oil in the pipe is sucked into the combustion chamber which has the effect of reducing the octane rating of the fuel (think putting diesel in a petrol car) and can cause detonation, which sounds like a tinkling or loud clicking sound (the knock sensor is frantically trying to compensate by adjusting the timing)
Acho que o pcv delete pode ser uma maneira de acertar, mas sei la a falta que essa mangueira faria!hehehe
Por isso que sou mais propenso ao oil catch tank..
abs
Links:
http://ds3club.eu/content/ds3-hesitatio ... -cure-140/
http://quatrorodas.abril.com.br/blogs/l ... 0/29/9142/
A consequencia sao meio graves, seguem as citações e o link pro pessoal ler :
Due to the THP engine being direct injection, i.e direct into the cylinder, and the way the PCV (positive crankcase ventilation) is laid out, a lot of oil haze gets sucked into the combustion chamber, past the valves and is burnt.
Well, that's how it's supposed to work!
In reality, this oil haze can cause numerous faults to standard engines, and any remapping or free flowing air filter arrangements can magnify the problems.
The 2 main problems are:-
1. Oil carbonising around the intake valve, which causes very rough running (which happened to Stef in his DS3R) which then requires the dealer to spray a special solution to dissolve this carbonisation (there is an info rapid)
2. When shutting down, because of vaccums within the engine and the layout of the rear PCV pipe, oil is left to collect in it, and when starting, assuming you drive easily until warm, is still sitting in the pipe because of the Valvetronic valve system on the THP engines, which under light load only partially opens the valves. Then, under harder acceleration, this oil in the pipe is sucked into the combustion chamber which has the effect of reducing the octane rating of the fuel (think putting diesel in a petrol car) and can cause detonation, which sounds like a tinkling or loud clicking sound (the knock sensor is frantically trying to compensate by adjusting the timing)
Acho que o pcv delete pode ser uma maneira de acertar, mas sei la a falta que essa mangueira faria!hehehe
Por isso que sou mais propenso ao oil catch tank..
abs
Links:
http://ds3club.eu/content/ds3-hesitatio ... -cure-140/
http://quatrorodas.abril.com.br/blogs/l ... 0/29/9142/