Originally Posted By: Esmolante
Bom dia, vizinho.
What I have heard about catastrophic engine failure in K9K is that some connecting rods' shells (capas de biela, penso que se chaman en português) lack of flap that inmovilize them. So, that shells roll and block the oil leads. Without lubrication, wear rate rockets, shells are destroyed and then the connecting rod, destroying the engine.
What I can't understand is Renault isn't able to determine what engines are affected. Renauld has (or should have) notice of what part has been used in which engine. It would be as easy as composing a list of engines with faulty shells and replace it.
In fact, I don't know even what incarnations of K9K are affected (o meu sogro tem o dci 68CV, andiven a pescudar e penso que ese motor não está afectado). Anyway, I think doing UOAs is an smart idea. As soon as you see copper and/or lead peaks in an analysis, change the shells ASAP. You can do an UOA each 2 OCI's (but I'm not sure how fast shells destroy once the problem appears).
Oil viscosity: 5W30 seems better for your bearing and 5W40 for cams and piston rings. With both, Iron is a little bit high. I recomend you don't go further of 10.000 km with OCIs.
BTW, several K9K have a big problem with fuel pump make by Delphi. Search for steel savings into the fuel filter and reduce interval to 30.000km maximum. Do some research if your car has that awful Delfi pump (Bosch VE doesn't have any problem).
Sugiro unha Super Bock preta como agradecimento.
Até logo!
Olá vizinho.
Sorry to respond so late.
Yes it is exactly that problem.
Renault PT always denied the problem I even contacted Renault FR and no answer!!
I'm am doing 1 UOA by 1 OCI.
My idea is to make the OCI every 10.000 km but this time I let it through.
I have never heard about the fuel pump problem but I will now deepen this situation. What problems causes that failure?
Thanks for the sugestion, i'll consider it.
Só bebo Sagres, mas posso oferecer uma Super Bock.
Abraço.