Thread: Moving crank case breather to fit turbo

That's interesting. My 4BD1T only has the rocker cover breather, both plates are blanks.

Was yours a factory fit or thrown in later?

Peter,

My 4BD1 has the same set up. When I fitted the turbo, I extended the breather straight out towards the guard by about 75mm using a piece of hi temp oil hose. The turbo is centre mounted, the dump pipe goes towards the rear, then 'S's down in front of the starter and exits under it, along the bellhousing edge near the clutch slave. (It is heat wrapped)
The breather pipe just passes between the middle of the first 'S' bit and the breather 'can' is bolted to one of the turbo flange bolts with a bracket. The outlet pipe then drops straight down to the chassis rail, where it gently lubricates the outside of the LH rail.

I am TRYING to get a way of posting pics as I have HEAPS of my truck.

JC

Thanks Justin. You are probably right. Extending the pipe work out is probably the easiest. My dump pipe will probably be a straight drop to where the existing pipe comes up from the outside of the 110 chassis rail. Reversing the turbo with dump pipe straight down is attractive as heat is kept away from the alternator.

Douglas I think the breather is on the driver side of some turbo motors. Below is a scan of my parts book and a photo from Bushy that partly shows a breather on his turbo motor.






regards

Peter

That second pic just shows the bottom edge of the oil catch can fitted to the turbo engines like mine.
It takes the breather from the rocker cover, seperates most of the oil and drains it back to the sump by an 8mm hose.
There's a vent hose about 16-19mm which depending on the emissions regs where it was sold either drops straight down or is routed back to the intake preturbo.

In that pic it's following the side of the block down to vent, I made a new can with mine venting back to the intake preturbo.

That steel oil line you see coming from the distribution block and snaking around the back of the engine is the factory turbo oil feed.

My rocker cover is a little different to the one shown, it has a PCV valve built into the inner steel cover, the outer cover has a built up bulge to clear it. The 1985 4BC2 NPR we have here has the same rocker cover and breather as my 4BD1T apart from the missing catch can. It's plumbed straight to the intake.

thanks Dougal.

Maybe I should just go with this set up rather than trying to modify the breather. Fitting an oil catch can wouldn't be hard.

So is the inner steel rocker cover different in the turbo motor, and the outer cover is raised, or are both unique to the turbo motor?