Skip to content
View in the app

A better way to browse. Learn more.

Ultimate Subaru Message Board

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Can PCV be replaced in cold weather

Featured Replies

I tried to replace the PCV on my '03 Legacy GT.  However it was - 3 degrees last night and the hard line that goes to the PCV was too hard to disconnect from the PCV.  You guys have any ideas?

I would wait for the weather to warm up. The rubber will not be pliable at that temp. 

Run the engine until its warm then the hoses should be as pliable as they'll ever get.

Be careful not to break the large hose that runs down to the block.

  • Author

Run the engine until its warm then the hoses should be as pliable as they'll ever get.

Be careful not to break the large hose that runs down to the block.

Ok the PCV screws into the block corrct or is it up at the intake end?

Hair dryier isnt a heat soak, its a spot heat and you can burn yourself or melt the rubber easily. STarting it may be best, but better wold be drive it and let it cool down then attack it.

Ok the PCV screws into the block corrct or is it up at the intake end?

intake

 

teh fitting in the block is just that.....a fitting.

Did they really flip back and forth? On my '02 OB the PCV is on the block (thought it remained on the case for at least the rest of that gen). I know 2000's(all?) were on the intake.

Edited by nickb21

Hair dryier isnt a heat soak, its a spot heat and you can burn yourself or melt the rubber easily. STarting it may be best, but better wold be drive it and let it cool down then attack it.

I don't know any standard hair dryer that will burn a person.  If hair dryers got that hot every woman with long hair would be in trouble!

If you are talking about one of those heat guns that looks similar to a hair dryer, that is a different story- those will do some damage (to your head an the hose).

I've done some excellent work with a hair dryer and frozen washer fluid lines.  The only thing melting was the water in the washer fluid.

I have gotten burned with hair driers, they will burn. Espcially in the hands of a clumsy barber.

definitely don't touch that thing when cold.  i've broken a zillion hoses.  at 10+ years all the rubber is prone to crack anyway, definitely get it up to good temps, even then they're prone to crack.

  • Author

Ok weather warmed up. Got hose off, however the part screwed into the intake is just a stright though fiting. The PCV must be screwed into the block end.

It does appear that at some point they switched it from the manifold to the block. Not sure why. Keeps the crud out of the hoses? Maybe less likely to clog?

  • Author

There was so much crud in the nipple fitting and PCV. Also I got a Fram PCV and the nipple is to big for the hose. Is this a dealer only part?

Edited by shortlid

I snapped two of these PCV hoses One at around 30F and the other around 49F thinking it would be warm enough.. NOPE.. so I sit hear waiting for the dealer to call me letting me know when it arrived.

 

at least that I have the IM off I replaced the last three rubber vac lines under the manifold near the FPR.

  • Author

There was so much crud in the nipple fitting and PCV. Also I got a Fram PCV and the nipple is to big for the hose. Is this a dealer only part?

 OK so went to another autoparts store and only Napa had the correct PCV for my '03 but wanted $13 it was a Eshich brand??  All others has the style that screws into the intake up untill 2005 Model year??  Why are the style that screw into the block so much more expensive than the ones that screw into the intake.

Both of my 2001 Legacy's with the 2.5 and my 98' Impreza has the screw in style into the intake manifold 

Please sign in to comment

You will be able to leave a comment after signing in

Sign In Now

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.