Flushing an engine

[timtheenchanter]

Its oil change time again.
my car has clocked just over 100K, Im wondeing if a flush out would be of benefit, and if so, how do you do it??

is the flush added to the old oil for a while first, or is it a drain, fill with flush, run it for a while, drain and fresh oil and filter??

406 HDI if it makes a difference.

 

[fushionjulz]

Unless you have contaminated the old oil in any way then I'd advise against a flush...
By flushing you remove the coating on the metal to metal bearing surfaces...Then when you start up on new oil an inordinate amount of wear will occur in the first few seconds until oil pressure is acheived...

If you MUST flush, then (on a diesel) crank the engine on refill with the fuel pump relay removed (so it doesn't fire) until you get full oil pressure...

There are two types of flushing oils...those that are additives to the old oil and those that are a complete engine/sump fill that you run for a specified time...

 

[Burnerman]

If your car has had regular oil and filter changes then there's no need to flush...however if the oil change is overdue or you feel like it, then a tin of engine flush by Forte is what you need (main dealers use it). This is added to the oil, and the engine run for a while or as per instructions and then all drained out.
Most modern engine oils are high in detergents and are quite capable of holding any dirt in suspension.
John

 

[timtheenchanter]

thanks, wont bother then, the car has had 6K oil changes for the last 2 years, and every year before that, definatly no longer than the 12K service interval so its not necessary then.

makes it a 1/2 hr job then....

 

[noseall]

Good....then.