Diesel engines

[pete1]

So I've rebuildt plenty of petrol engines done heaps of work on them and a small amount on diesel engines mostly trucks and tractors. This is my first time rebuilding a diesel engine and this is what i found under the rocker cover. I would say someones being using the wrong oil or not changing it enough (not my motor).

[on_one_wheel]

Modern diesel engines have nasty carbon issues caused by all the emissions rubbish.

Ideally the right oil will keep the carbon in suspension until the oil is dumped but the modern, powerful and fuel efficient engines with their "clean" tech are just typically nasty on the inside.

A good diesel engine oil will soot up quickly because its doing its job by keeping all the carbon in suspension and stopping it from building up. A poor oil will stay cleaner for much longer because it's allowing crud to build up on internal parts.

Trying a different oil may help but possibly the best way to keep it clean inside is to get rid of the anti pollution rubbish.

What make of engine is it and what is it in ?

[AusTac]

Hasn't seen an oil change in a while! The oil galleries will be sketchy as, last time i saw an engine like that, the manufacturer gave me a new one to whip in

[pete1]

Out of 2009 nissan navara 2.5L yeh its bad.

[happyhunter]

Diesel fuel is dirty and the oil gets a thrashing. The detergents in the oil break down after 5000k and the crap starts to deposit on the internals. Change the oil every 5000k and that gunk up shouldn't happen.

[Wobble]

Hasn't seen an oil change in a while!

Owner was like... "wait, wait... oil, change?"

[pete1]

Hasn't seen an oil change in a while!

Owner was like... "wait, wait... oil, change?"

feels like it.

[brett1868]

Probably cheapest oil they could find and no turbo timer or it was just driven and shutdown allowing the turbo to cook the oil. What was the rest of the vehicle like?

[wrenchman]

i have not seen sludge like that in a diesel eng just gas your oil pressure had to be real low i would be to supprised if it spun a bearing

[Blackened]

No one has time to service their vehicle but everyone has time and cash to fix it