Vehicle & Technical > Discovery

Missing Pipe - V8 Inlet Manifold

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Skibum346:
As some of you may remember I recently replaced the head gaskets on my beastie. Now when I put it back together, I noticed a banjo bolt on the back half of the inlet manifold (Shown as item 11 on the pic below). At the time I couldn't find a pipe to go onto it that I'd taken off so left it.



However, the more I think about it, the more it concerns me. Surely our favourite manufacture wouldn't have put it there if it didn't have a purpose?

So... the questions...

1. What is it?
2. What should it be connected to?

Thanks in advance for your help!

Skibum

Range Rover Blues:
There are a few things that run from the engine vacuum, some more important than others.

The vac adavnce will be from the carb, so no worries there.

Brake vacuum servo

Heater air recirculate on some models

Fully cold heater valve on some models

carbon air scrubber on EFi models

hot/cold engine air inlet on some carb models

Skibum346:
Hmmmm.... think I'll have to visit my local specialist top narrow your list down some RRB... but thanks!

Skibum

Range Rover Blues:
I had a thought, crankcase oil breather.

Range Rover Blues:
Ok, I had a look at the Haynes manual and I think it's the vacuum supply to the thermostatic control of air temperature for the carbs.  It's not the crank vent as this goes into the carbs (yuk), I can't see where the servo connects but that would be bigger IMHO.

So, do you have original air filters or after market bath sponges?  the original ones would have had a small bore black pipe that goes from a diaphram on the end of each trumpet via a thermostatic valve inside the airboxs, to a 'T' and back to that elbow you have found.

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