Thread: What have they done?

Note to self; you cant afford a D4 ever !!!!!!,

30 plus K for another engine fitted

Originally Posted by simmo

Note to self; you cant afford a D4 ever !!!!!!,

30 plus K for another engine fitted

Cost is no issue, as long as someone else is paying!!!!!!

Chappo

I'm glad my tdv8 RR has a dipstick.

Chappo's D4 has a dipstick as well - the guy filling the oil until he could see it!

Originally Posted by jonesy63

Chappo's D4 has a dipstick as well - the guy filling the oil until he could see it!

Well spoken.

Originally Posted by LandyAndy

I think you will find the 34K relates to the k's the second hand motor has done.
Andrew

haha yes I saw that after I got off my soapbox :P

Regards
Daz

Originally Posted by l00kin4

I understand the routine to check the engine oil level via service menu and have recently topped up in a few small steps. Confident I haven't overfilled it but it does show as full.

My questions are:

- how much would oil have to be overfilled to cause problems?
- can overfill warning be completely relied upon?
- if there are problems (saw blknight post this frightening list in another thread:
* spin bearings
* froth the oil and starve the engine
* get enough blow by to make the engine run on kill the rings
* blow the seals) would they be evident immediately or develop over time?

Thanks,
David

On a D4 (later 3.0 twin turbo) the secondary turbo bearing oil drain pipe goes to the sump, which in certain situations off road and over filling the engine, the drain into the sump is lower than the oil level and doesnt drain causing strain on the turbo bearing oil seal. If left for long enough the seal fails and will push oil into the intake. A diesel engine will quite happily run on most hydrocarbons..... such as engine oil. There is a mod kit that puts the oil drain pipe for the secondary turbo back into the side of the block higher up on the engine. (maybe the very latest D4 (the one with black tail light surrounds and no "4" on the back) has this done already from factory).

I have had a D4 in where it had pushed about 4 litres passed a failed turbo seal into the intercooler and as it was being unloaded off a truck it just started to do an increase in revs, until i jumped over and turned it off. the seal had been leaking and they had over filled it.

So in regards to the OP's issue, maybe the seal had been leaking a bit already, didnt have the mod done, they over filled it and it popped the seal on start up... I dont really know as I wasnt there.

The oil level can actually be checked on a cold engine that hasnt been started via the service menu, I've always found it accurate, when compared to the amount of oil I have added and also when comparing oil levels using a diagnostic tool.

Regards
Daz

Originally Posted by DazzaTD5

On a D4 (later 3.0 twin turbo) the secondary turbo bearing oil drain pipe goes to the sump, which in certain situations off road and over filling the engine, the drain into the sump is lower than the oil level and doesnt drain causing strain on the turbo bearing oil seal. If left for long enough the seal fails and will push oil into the intake. A diesel engine will quite happily run on most hydrocarbons..... such as engine oil. There is a mod kit that puts the oil drain pipe for the secondary turbo back into the side of the block higher up on the engine. (maybe the very latest D4 (the one with black tail light surrounds and no "4" on the back) has this done already from factory).

Not quite - the original drain goes to a small reservoir at the bottom of the sump to be reclaimed by a scavenger pump. The drain design was changed to feed directly to the sump because the scavenger pump is not 100% effective in all conditions and allows oil to accumulate in the turbo drain pipe which eventually backs-up and escapes past the still-good turbo seals into the inlet tract. The seals were never designed to prevent oil under pressure from escaping, under pressure due to a blocked drain and a pressurised feed.

The 4.4 TDV8 up to the same turbo drain design-change time as the 3.0 suffered from the same problem but its drain to the scavenger pump reservoir was replaced by a twin drain - one to the scavenger pump reservoir again and another directly to the sump. Retrofitting that drain is a major task.