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-   -   IACV question (https://landroverforums.com/forum/discovery-ii-18/iacv-question-121104/)

Harvlr 04-07-2024 02:43 PM

Aren’t we supposed to get rid of the oil separator when we do the PCV mod?

Frank4 04-07-2024 07:08 PM


Originally Posted by Harvlr (Post 895445)
Aren’t we supposed to get rid of the oil separator when we do the PCV mod?


Exactly. I removed mine per PCV MOD. Developed a surging idle, reinstall oil separator valve and the surging idle had not come back.

mln01 04-07-2024 08:09 PM


Originally Posted by Frank4 (Post 895332)
... I also replaced the plastic connector at the intake that the hose from the valve cover connects to with a brass fitting. ...

Frank4, in your post #6 in this thread you wrote what I have quoted above.

The PCV mod requires a PCV valve to be installed at the upper intake manifold, not just a "brass fitting".

What did you install there?

Frank4 04-07-2024 10:58 PM

Ah ha. That’s where I went wrong. I used an NPT valve! Straight through I guess?

mln01 04-08-2024 04:11 AM

Yeah, I used the brass plumbing fitting for 10 years after I broke the original plastic fitting and before I did the PCV mod 4½ years ago.

Frank4 04-08-2024 08:23 AM

The one I used was for my air compressor.


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