Page 2 of 2 FirstFirst 12
Results 21 to 40 of 40

Thread: Reasons for no oil in head?

  1. #21
    Guest ANDY black s13's Avatar
    Join Date
    Nov 2008
    Location
    erith kent england
    Posts
    6,350
    Rides
    0
    I hope you find something causing it,as nothing worse than checking something over and all seems good,
    hopefully its some thing cheap and simple like pick up pipe 'O' ring

  2. #22
    Guest Cornwall's Avatar
    Join Date
    Feb 2006
    Location
    Rode (West Country)
    Posts
    5,796
    Rides
    0
    Think I may have found the problem. Busy helping another local so not had a chance to fire up and test. Got 2 bar cranking though, if I get chance, will fit ic and start her tomorrow



  3. #23
    Guest Paulpen's Avatar
    Join Date
    Jan 2007
    Location
    Somerset
    Posts
    3,537
    Rides
    0
    Yay

  4. #24
    Now with 400bhp....
    Join Date
    Aug 2007
    Location
    South west
    Posts
    36,313
    Rides
    1
    Noob question but what actually is that part? Oil pick upin the sump?
    South west Events and local meet info. See here


    My car on THRLL: http://thrll.com/car/1998-nissan-200sx-12410
    Chris Cooke Photograpy: https://www.facebook.com/ChrisCookePhotography
    1998 Nissan 200sx s14a , 2000 std 5 speed with nismo supercoppermix clutch bn6 Sapphire Blue

  5. #25
    Banned sideways14a's Avatar
    Join Date
    Apr 2003
    Location
    Drunk as usual
    Posts
    34,697
    Rides
    0
    Looks like the oil pickup, if its cracked its prob not able to get up a decent pressure.

  6. #26
    Guest
    Join Date
    Feb 2004
    Location
    Burton on Trent
    Posts
    11,195
    Rides
    0
    Now you need to find the missing bit of o-ring.

  7. #27
    Now with 400bhp....
    Join Date
    Aug 2007
    Location
    South west
    Posts
    36,313
    Rides
    1
    According to facebook he's found it
    South west Events and local meet info. See here


    My car on THRLL: http://thrll.com/car/1998-nissan-200sx-12410
    Chris Cooke Photograpy: https://www.facebook.com/ChrisCookePhotography
    1998 Nissan 200sx s14a , 2000 std 5 speed with nismo supercoppermix clutch bn6 Sapphire Blue

  8. #28
    Guest ANDY black s13's Avatar
    Join Date
    Nov 2008
    Location
    erith kent england
    Posts
    6,350
    Rides
    0
    Cool,that will be sucking fresh air with a gap/bit missing like that and cause a pressure drop
    I nearly guessed right as well (ok I posted I hope its something simple like pick up pipe O ring)

  9. #29
    Guest Cornwall's Avatar
    Join Date
    Feb 2006
    Location
    Rode (West Country)
    Posts
    5,796
    Rides
    0
    I really hope it was a pressure issue and not a blockage. Will find out shortly, although have a turbo to fit on a Mates car first and he has bloody abs!!! Grrrrr!!!

    Thanks for the advice guys. New I would find it just quicker when you look in the obvious places ;-)

  10. #30
    Guest Cornwall's Avatar
    Join Date
    Feb 2006
    Location
    Rode (West Country)
    Posts
    5,796
    Rides
    0
    So finally got time today to run the engine up to temp. Still tapping and looks like very little oil getting to the head.
    Oil pressure is now bang on. Where to start if looking for a blockage? Cam lobes or some where in the block?

    Need some advice on this, never had to look for an oil blockage

    Sent from my GT-N7000 using Tapatalk

  11. #31
    Guest
    Join Date
    Feb 2004
    Location
    Burton on Trent
    Posts
    11,195
    Rides
    0
    The most probable place is the oil restrictor jet in the top of the block. After that it passes up the head bolt hole, inlet side 2nd from rear. If there was dirt under the bolt washer that could result in a leak. There is a drilling into the bolt hole that connects with the inlet side gallery. There is a cross drilled passage to the exhaust side.

  12. #32
    Guest Cornwall's Avatar
    Join Date
    Feb 2006
    Location
    Rode (West Country)
    Posts
    5,796
    Rides
    0
    Any idea how to clear a blockage?

    I understand the oil system and passages but they are all internal, how do I find the blockage and then clear it? Sounds stupid but would an engine flush help? or an air pressure line pushing the blockage back?

    Is the restricter jet one way valve?

  13. #33
    Guest
    Join Date
    Feb 2004
    Location
    Burton on Trent
    Posts
    11,195
    Rides
    0
    Quote Originally Posted by Cornwall View Post
    Any idea how to clear a blockage?
    Nothing other than pull it apart again.

    Quote Originally Posted by Cornwall View Post
    I understand the oil system and passages but they are all internal, how do I find the blockage and then clear it? Sounds stupid but would an engine flush help? or an air pressure line pushing the blockage back?
    No. When the head is off if you don't get oil out the restrictor when you crank the motor than it's in the block. If you do get oil then it's in the head. Then it comes down to removing the oil gallery plugs and cleaning with the sort of tools that are used to clean small bore rifles. If it's the block remove the restrictor and clean that rising feed.

    Quote Originally Posted by Cornwall View Post
    Is the restricter jet one way valve?
    No it's just a plug of metal with a small hole ~1mm.

  14. #34
    Guest Cornwall's Avatar
    Join Date
    Feb 2006
    Location
    Rode (West Country)
    Posts
    5,796
    Rides
    0
    Quote Originally Posted by skyshack View Post

    No. When the head is off if you don't get oil out the restrictor when you crank the motor than it's in the block.
    Its the block then, I cranked when the head was off and no oil out the restrictor at 2 bar. Dont like the sound of taking the oil gallery plugs out but needs must. I will get her back on the road for spring 2013.

    Will be whipping the head off again then

    Thanks for the info man

  15. #35
    Guest Cornwall's Avatar
    Join Date
    Feb 2006
    Location
    Rode (West Country)
    Posts
    5,796
    Rides
    0
    http://forums.nicoclub.com/a-bad-day...d-t527348.html

    Interesting, there's a little valve in there. I bet mine is blocked

  16. #36
    Guest D_Stirls's Avatar
    Join Date
    Sep 2008
    Location
    Adelaide, Australia
    Posts
    205
    Rides
    0
    That valve in the nico thread is in oil filter housing on the block, and is a bypass for a blocked filter so you don't starve your engine. The restrictor for the head is just has been described above, a metal plug with a hole in it.
    The GTR (RB26) guys fit smaller restrictors to limit the oil getting to the head with track engines. All they do is get another restrictor and push the current restrictor further in the head, this isn't going to help you though. The only thing i can think of (although i wouldn't want to do it on an assembled engine) is drill and tap the restrictor and then pull it out.

  17. #37
    Guest bradders87's Avatar
    Join Date
    Feb 2013
    Location
    Harrow
    Posts
    53
    Rides
    0
    I had the same problem a little while back, ended up changing the block , http://youtu.be/3FhSCHFZk-g this is wat pressure is meant to be

  18. #38
    Member JCD's Avatar
    Join Date
    May 2003
    Location
    Belgium
    Posts
    1,440
    Rides
    0
    Quote Originally Posted by bradders87 View Post
    I had the same problem a little while back, ended up changing the block , http://youtu.be/3FhSCHFZk-g this is wat pressure is meant to be
    Was that with the restrictor in?
    S13 "Evil Edition"

    Link to my supercharger project

    The amateur is a fool. Ignorant that something is impossible, he will succeed realizing it.
    -Paul Godley 2ZE

  19. #39
    Guest bradders87's Avatar
    Join Date
    Feb 2013
    Location
    Harrow
    Posts
    53
    Rides
    0
    Yeah restriction was in place,

  20. #40
    Member JCD's Avatar
    Join Date
    May 2003
    Location
    Belgium
    Posts
    1,440
    Rides
    0
    This is good info, thanks.
    S13 "Evil Edition"

    Link to my supercharger project

    The amateur is a fool. Ignorant that something is impossible, he will succeed realizing it.
    -Paul Godley 2ZE

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •