Thread: 4BD1 into 88 Range Rover

Originally Posted by isuzurover

Land rover 4BD1s have an 8mm (ID) breather tube going from the tappet cover to the air intake (just before the intake manifold).

They also have the large steel breather connected to the side cover.

When I fitted my turbo, I T-d the two breathers together, then connected them to a Provent.

The breather connection on the intake is now where my wastegate connects to.

Correct me if I'm wrong, The tappet cover breather is now T'd to the rubber hose on the wastegate?

The large steel breather connects to your Provent?

What did the original Land Rover part that the large vent connected to look like, it might still be laying around somewhere from when we pulled everything apart we have bits of my Land Rover and Rangie as we as all of Max's stuff from his other projects all over the place!

As mentioned in a previous post the Land Rover was pulled apart in 2007, we don't remember what everything hooked up to.

Glenn

Originally Posted by The Mutt

What does it look like, if you don't mind I might duplicate your air/oil seperator?

At the moment it is venting to the atmosphere and dropping oil directly onto the concrete.

Does the breather on the right side of the rocker cover connect to the same seperator?


Glenn

The 4BD1 fitted to Land Rovers have the rocker cover as used on the stationary engines. The crankcase breaths through a cover over the tappet/pushrod chest.

4BD1 and 4BD1-T in trucks have a different rocker cover with outer acoustic cover. The crankcase breaths through the rocker cover.

Additionally the -T has an oil catch can in the 1/2" line from the rocker cover. Oil collected in the catch can drains back to the sump and air vents to atmosphere.

I intend to replace my catch can with a Provent, so have a spare catch can if you need it.

Originally Posted by The Mutt

Correct me if I'm wrong, The tappet cover breather is now T'd to the rubber hose on the wastegate?

The large steel breather connects to your Provent?

What did the original Land Rover part that the large vent connected to look like, it might still be laying around somewhere from when we pulled everything apart we have bits of my Land Rover and Rangie as we as all of Max's stuff from his other projects all over the place!

As mentioned in a previous post the Land Rover was pulled apart in 2007, we don't remember what everything hooked up to.

Glenn

As I understand, what Ben did was disconnect the breather that went from the rocker cover to the inlet manifold. He then connected the wastegate to the port on the manifold (that the breather was previously connected to).

Here is a pic showing the 4BD1-T catch can. And a poor one of part of the Land Rover breather - I think Ben's thread on fitting his turbo may have some better pics.

Originally Posted by Bush65

As I understand, what Ben did was disconnect the breather that went from the rocker cover to the inlet manifold. He then connected the wastegate to the port on the manifold (that the breather was previously connected to).

Yep, that's it - thanks John.

Some pics here:
http://www.aulro.com/afvb/isuzu-land...o-install.html

And here:
http://www.aulro.com/afvb/isuzu-land...t-install.html

Thanks for the photos John and isuzurover, I have seen at least one of these parts in the piles of bits 'N pieces I'm sure the other is there as well, it will be much easier now I know what I'm looking for.

Down the track I might invest in a Provent my main concern at this time is to get rolling again, we intend to have time off and want to do a bit of sailing and go for a few drives.

This weekend is a right-off for working on the vehicle due to Christmas parties, next weekend we'll be at it again.

Glenn

There is a metal tube coming off the engine side plate to the the factory breather



Where does the other pipe connect to?

If it's the Alternator we have some re-routung to do, the alternator is now at the highest it could go and still be able close the bonnet.

Glenn

Originally Posted by The Mutt

There is a metal tube coming off the engine side plate to the the factory breather



Where does the other pipe connect to?

If it's the Alternator we have some re-routung to do, the alternator is now at the highest it could go and still be able close the bonnet.

Glenn

The tube closest to the front of the image just goes down to chassis level and vents to atmosphere.

Originally Posted by isuzurover

The tube closest to the front of the image just goes down to chassis level and vents to atmosphere.

That will make it easier.

Thanks for that.

Glenn

What is the best exhaust set-up?

Some Rice Racers I know think I should go for a 2 1/2 inch straight through exhaust with two mufflers to cut down on noise.

I have no idea, I'd like to work out some options before talking to the Exhaust guy and getting talked into a quick and easy job or a $$$$$$$$$$ job.

Glenn