Thread: 4BD1 Provent Install

Originally Posted by rovercare

I'm tipping so, as the 2 civvy ones I have don't and the mil one does

So you have 3 4BD1s??? Are you cornering the market???

Originally Posted by isuzurover

So you have 3 4BD1s??? Are you cornering the market???

120"

one thats sold

one that's going in my RR

Turbo and manifold will be here next week, so with any luck, it'll all be together in less than a fortnight

Originally Posted by rar110

Must be some minor variations between motors. Mine has the plate held in place by two bolts, just without the drain tube.

Sounds like you've got a turbo block. Do you know what year your engine is, what type of rocker cover does it have? Flat, short hump or long hump?

Originally Posted by Dougal

Sounds like you've got a turbo block. Do you know what year your engine is, what type of rocker cover does it have? Flat, short hump or long hump?

I bought it as a rolling chassis with engine and civilian intermediate shaft setup. The chassis had been redipped so as the engine had been removed I thought it may not be original. But checked with landrover who said the engine matches the chassis. it's a 1989 FFR 110. The rocker cover is flat like the civilian land rover versions.

Hi Ben,

Do you have any pics or diagrams of your final (with turbo) provent install? I bought one and while I get the general idea, it didn't come with installation instructions..

Cheers!

Originally Posted by flagg

Hi Ben,

Do you have any pics or diagrams of your final (with turbo) provent install? I bought one and while I get the general idea, it didn't come with installation instructions..

Cheers!

No, sorry. What would you like to know?

Thanks Ben, couple of things:

Is the vent on the non-turbo rocker cover big enough? If not, do I need to replace the tapped cover as well as the rocker cover for the 4BD1T to get the larger vent?
Where is the best place to plumb the return? should it go to the sump, or ?

Originally Posted by flagg

Thanks Ben, couple of things:

Is the vent on the non-turbo rocker cover big enough? If not, do I need to replace the tapped cover as well as the rocker cover for the 4BD1T to get the larger vent?
Where is the best place to plumb the return? should it go to the sump, or ?

The tappet cover net on NA landie engines is too small - only 8 mm. If you are going to T-in both tappet and side plate breathers like I did initially then that will work.

I swapped to a turbo setup (larger tappet breather and no side plate breather). The turbo tappet cover breather is 19 mm.

A drain straight to the sump is the best option. However T-ing into the vaccuum pump breather drain should also work. Make sure you use a one-way valve in the drain.