Rocker cover pressure?!

1. W4rdy1 L-plater Joined: Jul 2014 Posts: 39

   #1 24th February 2015, 20:25

   Hi I've just bought a saxo vtr.
   I noticed there is a positive pressure in the rocker cover when idling.
   If I take the oil cap off there is air coming out, I wasn't sure if this was meant to be a negative pressure or wether positive pressure was normal on the vtr.
   Many thanks
   Also, If someone could see what theirs is doing when the cap is removed I'd really appreciate it!
2. sexysaxo_dan Infrequent Poster Joined: Oct 2012 Dorset Posts: 237 Citroen Saxo Furio 1.4l

   #2 24th February 2015, 20:41

   this is normal as far as I'm aware. along as you breather pipe is clear it will do no harm to your engine
3. W4rdy1 L-plater Joined: Jul 2014 Posts: 39

   #3 24th February 2015, 21:04

   Ok, I know a positive pressure can be normal for some engines but thought it was more common for them to have a negative pressure.
   Just wondered if it was pressure leaking past the rings!
   Would still be nice if someone could try it out if they have 30 seconds spare.
   Thanks
4. Nimix Regular Poster Joined: Jan 2015 Naestved, Denmark Posts: 281 ex-Blue 106 Rallye 1.6 '97 Black 106 Gti '99

   #4 24th February 2015, 22:32

   Try what out?
   You got your answer.
   
   If you bothered to check how an TU engine works you would know there is pressure is the covers, which is why there is a breathing hole.
   And that the JP4 has an improved design with a hole in each as that was/is an issue with the J4.
   
   So i ask again, try what?
5. W4rdy1 L-plater Joined: Jul 2014 Posts: 39

   #5 25th February 2015, 14:28

   Well try their car to see if there is a positive pressure with the cap off.
   The original reply said 'it's fine as far as I am aware'.
   This says to me that he/she wasn't 100% sure, which is why I asked for more clarification.
   I have no idea why you are choosing to be a moron.
   I'm only new and asking for help!
6. W4rdy1 L-plater Joined: Jul 2014 Posts: 39

   #6 25th February 2015, 14:28

   Well try their car to see if there is a positive pressure with the cap off.
   The original reply said 'it's fine as far as I am aware'.
   This says to me that he/she wasn't 100% sure, which is why I asked for more clarification.
   I have no idea why you are choosing to be a moron.
   I'm only new and asking for help!
7. chinkostu Saxperience Post Whore Joined: Aug 2008 The wrong carpark Posts: 5152 Xantia 1.9TD

   #7 25th February 2015, 19:10

   mine blew like a bastard through the filler hole
8. W4rdy1 L-plater Joined: Jul 2014 Posts: 39

   #8 25th February 2015, 21:24

   Ok thanks very much
9. axsaxoman Saxperience Forum Bum Joined: Jan 2003 Scotland Posts: 3380

   #9 4th March 2015, 13:36

   come on don,t be thick -- check breather pressure not by removing filler cap--that will chuck oil out --take pipe of the breather connection and feel
   , Iam guessing on idle you have pressure if hhwen you lift rpm to say 2k it goes thats std --just a bit of old age --if it gets worse as you rev it --then there is too much wear in pistons /rings /bore
10. W4rdy1 L-plater Joined: Jul 2014 Posts: 39

    #10 5th March 2015, 20:23

    Quote:

    Originally Posted by axsaxoman come on don,t be thick -- check breather pressure not by removing filler cap--that will chuck oil out --take pipe of the breather connection and feel , Iam guessing on idle you have pressure if hhwen you lift rpm to say 2k it goes thats std --just a bit of old age --if it gets worse as you rev it --then there is too much wear in pistons /rings /bore

    Thick?, after that reply. Ok then mate! Lol