Hi motorers!

I've read many posts about PCV hose and valve that could cause lost of performance. I have an appointment next week for my 2nd service and I'd like to have a look a it before my car goes in.

Thank you for any help! :smile:

 

>>I've read many posts about PCV hose and valve that could cause lost of performance.

1st, where are these threads? Can you provide links? What "performance" is lost?

2ns, easy to check. If the hose feels soft and you can collapse it easily between your fingers, then the hose needs replacing.

 

Since a little while, I've noticed that sometimes, my car feels like it's missing power... Other times, the car really feels stronger (even more at lower RPM). I have a 15% pulley and an intake so far.

I already know that the PCV valve has something to do with the engine's back pressure. I've also read that if a little bit of oil comes in the PCV hose, it will collapse under throttle.

In another post, I've seen taht if you shake the valve and it rattles, then the valve is ok but if there's no sound coming out of it, then it needs to ben replaces.

The only thing I'd like to know is how to reach it :smile:

I would like to have a look at it to make sure everything is ok.

Thanks for any help!

 

The PCV valve and it's little right-angle hose reside just below the "MINI" plate on the top of the engine when you stand in front of the car and look at it. The hose attaches to the valve and then to a plastic tube which routes to the intake just behind the throttle body. There is nothing special about this hose, it's about 3/8" I.D. and pushes onto each fitting with no clamps or tools. a length of 3/8 fuel line would work fine, a molded right angle hose would be less prone to being kinked. Most auto parts stores can hook you up (no pun intended) with a replacement hose.

The problem with the stock hose is that there is no reinforcement which would keep the hose from collapsing under high vacuum. Heat, combined with the oily vaopr passing through the hose softens it, and it collapses, often making a groaning, whistling or farting sound. I replaced mine with a length of reinforced fuel line hose and it's been fine.

 

Here's a picture of my engine from the left side...

Greatbear, could you tell me which hose is the PCV one?

Thank you for your help!

 

I already know it's none of the 3 I highlighted...

 

The thick, short hose just above the one lablelled "I" in the pic. It bends around the #1 spark plug boot.

 

Just to make sure, is it the one I highlighted with the yellow arrow?



The PCV valve is located right beside the "M" of the "MINI"under the valve cover??


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A ride of MINI a day keeps doctor away

 

yes

 

Yep, that's it. Squeeze it (especially when the engine is running and hot) and it will undoubtedly feel soft and collapse rather easily. The PCV valve is held in the valve cover near the "M" with the small bolt.
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"Earl Grey" - '03 MCS, DS over DS, 17" R85s, NAV, DSC (often turned off!), Packs #1 and #3, Rally lights, etc, etc. Perf Mods by the boatload, on the way! Fulton, MD. FRS 7-21
Let's Get Small!

 

So I just go to a local shop and get a stronger hose?

Is it something easy to do? (Like just unplug the hose and put the new one on)

Thanks again!