Fordmods Logo

Rocker cover breather hose and PCV 

 

Page 1 of 1 [ 5 posts ] 

 
 Post subject: Rocker cover breather hose and PCV
Posted: Wed Feb 01, 2006 9:07 pm 
Getting Side Ways
Offline
User avatar

Age: 31

Posts: 11103

Joined: 15th Nov 2004

Ride: AU III XR8 Pursuit 250 ute

Location: Hobart
TAS, Australia

I'm still confused on rocker cover breather hose at the rear and the PCV at the front. What stops the oil and that going out the breather at the rear of the rocker cover instead of working it's what through the PCV?
Also, if you removed the rear breather hose and replaced it with a breather filter thingo would that cause a drop in oil pressure?

 

_________________

Heaps of performance EF/L parts for sale, including supercharged VCT motor!

2002 Ford AU Series III Falcon XR8 Pursuit 250 ute - 5.6L of V8 Windsor!

Top
 Profile  
 
 
Posted: Thu Feb 02, 2006 1:13 pm 
Getting Side Ways
Offline
User avatar

Age: 49

Posts: 1966

Joined: 13th Aug 2005

Ride: 2000 Au wagon

Location: some where in nsw
NSW, Australia

there should be a baffle under it.

sort of like an L shaped piece of metal.

 

_________________

Image

Top
 Profile  
 
 
Posted: Thu Feb 02, 2006 2:03 pm 
Getting Side Ways
Offline
User avatar

Age: 36

Posts: 8655

Joined: 5th Nov 2004

Gallery: 37 images

Ride: V8 EF Futura

Location: Adelaide CBD
SA, Australia

Becasue the PCV "sucks" the exhaust gases/whatever from the crankcase into the manifold. That's the reason it has a check valve - so the gasses can only go one way.

The breather hose allows air to enter the crankcase to fill the vacuum being created by PCV. In order for oil/gasses to travel back through the breather hose, the PCV valve must fail and and allow air to travel the "wrong way" through it....

Nothing to be gained from putting a breather filter in there. Oil pressure would not be affected (you can run the car with the oil filler cap off if you wish!) but it may introduce a vac leak...

 

_________________

I promise..... I will never die.

Fordmods Administration Group MINOR PUNKED

Top
 Profile  
 
 
Posted: Thu Feb 02, 2006 2:38 pm 
Getting Side Ways
Offline
User avatar

Age: 79

Posts: 1233

Joined: 7th Apr 2005

Gallery: 7 images

Ride: GTHO PH 1 EF ex chaser

Location: Willow vale, GOLD COAST
QLD, Australia

4.9 EF Futura wrote:
Becasue the PCV "sucks" the exhaust gases/whatever from the crankcase into the manifold. That's the reason it has a check valve - so the gasses can only go one way.

The breather hose allows air to enter the crankcase to fill the vacuum being created by PCV. In order for oil/gasses to travel back through the breather hose, the PCV valve must fail and and allow air to travel the "wrong way" through it....

Nothing to be gained from putting a breather filter in there. Oil pressure would not be affected (you can run the car with the oil filler cap off if you wish!) but it may introduce a vac leak...

Earlier models with early injection systems ran VERY ragged if you loosned the oil filler cap OR the dilstick wasn't pushed in properly to seal :roll: :shock: :shock:

 

_________________

Rotten Old Revhead!!! XW GTHO + EF ex cop car (exractors 2.5 cat back zorst !6" Simmons K&N +airbox mods Lowered with Bilstein shocks+Whiteline Bars NEXT THING Swap HO for GTP or Ferrari!

Top
 Profile  
 
 
Posted: Thu Feb 02, 2006 7:23 pm 
Stock as a Rock
Offline

Posts: 168

Joined: 5th Jan 2006

Ride: XY Fairmont

Location: Berri
SA, Australia

Thats because of the ' breather hose' from the rocker cover to the throttle body. Air entering thru this hose is not recognised by the ECU as it is after the air flow meter.

 

_________________

Real Cars have Chrome Bars

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 5 posts ] 

Who is online

Users browsing this forum: No registered users and 24 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Mon Dec 18, 2017 11:48 pm All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names