1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

2F head

Discussion in '40- & 55-Series Tech' started by apeterson, Aug 10, 2006.

  1. apeterson

    apeterson SILVER Star

    Messages:
    3,881
    Likes Received:
    214
    Joined:
    Jul 20, 2006
    Location:
    Pequot Lakes MN
    does anyone know if a 2f head will work on a f engine... trying to get an engine running and it will not start... PO said he rebuilt with a 2f head? is that the problem? Has not run in a while (not sure how long) has spark, and compression, and will pop off if you pour gas in the carb, but will not stay running.... Just want to make sure it will work and that is not my problem....

    any ideas?

    A.P.
     
  2. Poser

    Poser Oh...Durka Durka Durka. s-Moderator Supporting Vendor

    Messages:
    20,240
    Media:
    17
    Albums:
    1
    Likes Received:
    538
    Joined:
    Oct 1, 2003
    Location:
    MN
    Well if it will run when you pour gas down the carb, but will not keep running, that would tend to make me think about fuel delivery issues....
     
  3. 65swb45

    65swb45 Supporting Vendor

    Messages:
    20,782
    Likes Received:
    5,348
    Joined:
    Apr 14, 2004
    Location:
    so cal, going 45
    2F heads can be run on an F engine, provided the F engine rocker oiling system is retained and the manifold studs work with the manifolds. Not a deal breaker.

    Just a hunch, but I'd guess that in your scenario, someone inadvertently bumped up the timing too far. I'd start by finding #1 TDC compression stroke and checking your distributor timing.

    If popping continues, do a compression test and follow up low readings with a 'wet' test.

    Hth

    Mark A.
     
  4. apeterson

    apeterson SILVER Star

    Messages:
    3,881
    Likes Received:
    214
    Joined:
    Jul 20, 2006
    Location:
    Pequot Lakes MN
    ok.... timing has been checked (or I think)... I dont know how to do this myself, but I do need to learn, but the guy I am buying it from has checked it... it will not run but will spit and sputter....

    Thanks for your replys!
     
  5. Mark W

    Mark W

    Messages:
    6,184
    Likes Received:
    87
    Joined:
    Jan 7, 2005
    Location:
    The Greatland
    *Some* 2F heads will work on *some* F engines, albeit with lowered compression.

    What vintage F shortblock and what vintage 2F head did you combine?


    Mark...
     
  6. apeterson

    apeterson SILVER Star

    Messages:
    3,881
    Likes Received:
    214
    Joined:
    Jul 20, 2006
    Location:
    Pequot Lakes MN
    well..... I am not sure.... I have not looked at the engine yet... I am buying it from someone... I know it is a 74 F and have no idea what 2F is on it... what do you mean by some will work and some will not?
     
  7. apeterson

    apeterson SILVER Star

    Messages:
    3,881
    Likes Received:
    214
    Joined:
    Jul 20, 2006
    Location:
    Pequot Lakes MN
    so how can I tell if the rocker arms are getting oil... right now I got it running, just having some fuel issues so it will not stay running long enough now to see any oil on the rockers.... what will it look like when I get it running... should oil be spashing up on the rockers and valvles if it is working properly?
     
  8. rjcruiser

    rjcruiser

    Messages:
    329
    Likes Received:
    5
    Joined:
    Feb 13, 2006
    Location:
    Covington GA
    With the valve cover off and the engine running, you'll get oil to start dripping from the rockers. Also, the fan will start to blow it all over your engine bay and carb, so you'll want to keep a little rag handy to wipe up the mess after you shut things down. I must say, watching the valves dance up and down is a pretty sight. Another thing you'll want to probably do is adjust the valves to the proper specs. I know that when I did that with my engine (sitting for a long time before I got it), it made a big difference.
     
  9. Mark W

    Mark W

    Messages:
    6,184
    Likes Received:
    87
    Joined:
    Jan 7, 2005
    Location:
    The Greatland

    Pre '68 F engines used siamesed exhaust ports and a deep "bathtub" style combustion chamber. They're pretty much on their own so far as interchanginf anything.

    From then until '72 the F engine used a flattop piston and a closed combustion chamber.
    '73 and '74 F engines used an open combustion chamber and a very small dome on the piston.

    '75-'80 US variant 2Fs used an open chamber and a domed piston.

    '81 and later 2Fs used a closed chamber and a flat top piston.


    A '73-'74 F head will be a bolt on swap to any of the 2F, producing more compression on the '75-'80 blocks.

    A pre '73 F head will swap to the later 2F engines once the rocker arm oiling is addressed. There will be piston/head interference on the early 2Fs

    You can install an early 2F head on a late 2F engine. You will loose compression.

    You can install any 2F head on the pre-'73 F engines. Again, you will loose compression, especially if you install an early 2F head with the open chamber.


    Mark...
     
  10. wesintl

    wesintl

    Messages:
    4,511
    Media:
    1
    Albums:
    1
    Likes Received:
    21
    Joined:
    Mar 14, 2003
    Location:
    Between Here and There
    Above post should be in the FAQ.
     
  11. apeterson

    apeterson SILVER Star

    Messages:
    3,881
    Likes Received:
    214
    Joined:
    Jul 20, 2006
    Location:
    Pequot Lakes MN
    Thanks.... am I wrong in thinking I have a f engine with a 2 F head..... an I a Nobb and dont know what I am talking about (very very new to this)

    so I got compression and it will start... once I get the fuel thing figured out.... so if it runs am I okay... or should I be worried about something??? I dont want to destroy my engine if there is something I should be doing differently..

    My engine block is Blue, does that mean anything or did someone just paint it.
    I also have a 4 speed trans. and I though before I got this that every 2f came with a 4 speed and all f came with a 3 speed... am I wrong here to...

    sorry so many questions.... I am learning and reading alot.... thanks!!
     
  12. rjcruiser

    rjcruiser

    Messages:
    329
    Likes Received:
    5
    Joined:
    Feb 13, 2006
    Location:
    Covington GA
    I'm not sure about the above....I've got an early F (off a '64) that I bolted up a '73 head to. This allows me to use the later model carb intake (double barrel) and improved exhaust manifold. I've got it running fairly well...don't have compression numbers as I don't have a compression tool. I think I have a little bit of a vacuum leak, but other than that, it idles and drives fine.
     
  13. Mark W

    Mark W

    Messages:
    6,184
    Likes Received:
    87
    Joined:
    Jan 7, 2005
    Location:
    The Greatland

    Sorry, I was thinking about swapping the bathtub head onto anything else. If you swapp the manifolds and other affected components along with the head, then you can update the earlier Fs with the later F heads. It'll boost your compression some too.


    Mark...
     
  14. rjcruiser

    rjcruiser

    Messages:
    329
    Likes Received:
    5
    Joined:
    Feb 13, 2006
    Location:
    Covington GA
    No apology necessary.....as a rookie, I don't want to come across as knowing more than a lifer :)
     
  15. apeterson

    apeterson SILVER Star

    Messages:
    3,881
    Likes Received:
    214
    Joined:
    Jul 20, 2006
    Location:
    Pequot Lakes MN
    Thanks Mark! hope who ever put my head in did everything they were suppose to do...
     
  16. IDave

    IDave

    Messages:
    7,167
    Media:
    1
    Albums:
    1
    Likes Received:
    23
    Joined:
    Jan 3, 2003
    Location:
    McCall, ID
    How does a late F/2F oil it's rockers? There's no oil tube or union like my earlier Fs.
     
  17. Mark W

    Mark W

    Messages:
    6,184
    Likes Received:
    87
    Joined:
    Jan 7, 2005
    Location:
    The Greatland
    '74 and on oil the rockers via a passage from the #3 cam bearing, through the top of the block, over to the head bolt by the #5 spark plug via a passage in the head gasket, up around the head bolt into the head, then via a drilled boss to the base of the rocker arm pedestal just ahead of #5 plug and up through the pedestal to the rocker arm assembly.


    Mark...
     
  18. IDave

    IDave

    Messages:
    7,167
    Media:
    1
    Albums:
    1
    Likes Received:
    23
    Joined:
    Jan 3, 2003
    Location:
    McCall, ID
    Thanks, Mark!
     
  19. Degnol

    Degnol

    Messages:
    8,121
    Media:
    16
    Albums:
    1
    Likes Received:
    14
    Joined:
    Jan 22, 2003
    Location:
    Kansastitty


    Jeeze Dave. that's just what I told you in a more-confusing, less professional, un-technical way.;)


    Ed
     
  20. IDave

    IDave

    Messages:
    7,167
    Media:
    1
    Albums:
    1
    Likes Received:
    23
    Joined:
    Jan 3, 2003
    Location:
    McCall, ID

    Thank you, too, Ed!