Results 1 to 6 of 6

Thread: N42 condition

  1. #1
    Chillin Inf's Avatar
    Member ID
    CZCC-3312
    Join Date
    Jan 2003
    Location
    Austin, TX USA
    Posts
    853

    Question N42 condition

    I may be buying an N42 that is in need of a rebuild. The owner sent some pics along with an explanation of what went wrong before he replaced it. Maybe you guys could give me some advice. I was a little concerned by looking at the photos since it looks like the casting is deformed around the water passages. I'm no expert and have really never looked at the business side of a cylinder head, but I am sure many of you know your way around.

    Here is the explanation I got from the seller :

    ok here's the skinny on the head.
    I picked up a 75 down in texas. upon returning the car was running
    mediocare. thinking there was a timing issue i pull the valve cover and
    front cover to make sure. no problems.
    turns out that a senor lead was the culpate and everything was put back
    together.
    after running the car for a while i take it up the road for a test run.
    while running the car, the pin that holds the cam gear to the camshaft
    wiggled loose. the cam gear proceeded to move on the cam and bang ... big no
    no. after pulling the head i found the problem and the result. 6 bent
    exhaust valves. upon futher inspection i noticed that it still had the
    orginal intake bronze valve seats. after removing one intake valve it was
    clear that the head needed to be rebuilt. with no time or funds for such i
    transplanted an 280zx block with an n-47 head into may car(it ran real
    good.
    i have kept the head around because i was looking to do a turbo build but
    have since aquired a p90a head and have settled the question of which head
    to use.

    the head is going to need all new valves as well as new intake valve seats.
    i spoke with a machine shop who remembers those old heads and said i proubly
    won't need to replace any of the exhaust seat because they are steel.

    the rockers are setting on a shelf somewhere collecting dust. if you want i
    can find them and include them. the cam is stock. unfortunitlly i have
    lost the valves for the #1 cylinder and can't account for them.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	n42-1.jpg 
Views:	98 
Size:	41.1 KB 
ID:	2437  
    Last edited by Inf; 07-21-2003 at 09:56 AM.
    -Andrew

    03/72 240Z HLS30-70xxx - R.I.P. 2011/01/04

  2. #2
    Chillin Inf's Avatar
    Member ID
    CZCC-3312
    Join Date
    Jan 2003
    Location
    Austin, TX USA
    Posts
    853

    Default

    pic #2
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	n42-2.jpg 
Views:	72 
Size:	32.6 KB 
ID:	2438  
    -Andrew

    03/72 240Z HLS30-70xxx - R.I.P. 2011/01/04

  3. #3
    Chillin Inf's Avatar
    Member ID
    CZCC-3312
    Join Date
    Jan 2003
    Location
    Austin, TX USA
    Posts
    853

    Default

    pic #3
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	n42-3.jpg 
Views:	57 
Size:	38.5 KB 
ID:	2439  
    -Andrew

    03/72 240Z HLS30-70xxx - R.I.P. 2011/01/04

  4. #4
    Chillin Inf's Avatar
    Member ID
    CZCC-3312
    Join Date
    Jan 2003
    Location
    Austin, TX USA
    Posts
    853

    Default

    last pic, #4
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	n42-4.jpg 
Views:	63 
Size:	41.9 KB 
ID:	2440  
    -Andrew

    03/72 240Z HLS30-70xxx - R.I.P. 2011/01/04

  5. #5
    beandip beandip's Avatar
    Member ID
    CZCC-1887
    Join Date
    Mar 2002
    Location
    Beaverton, Oregon
    Age
    81
    Posts
    4,038

    Default

    PASS unless it's free. there are heads out here that are good . looks like water jacket trouble for one thing. the rockers must be replaced in the same order they came off the cam or they will eat each other. if they are " on a shelf somewhare" that isnt going to happen. There was a posting recently for a free engine and trans. here on the club site.

  6. #6
    Chillin Inf's Avatar
    Member ID
    CZCC-3312
    Join Date
    Jan 2003
    Location
    Austin, TX USA
    Posts
    853

    Default

    Thanks for the reply beandip,

    I think i'll pass on this one, I've seen a few other heads for sale and will be looking into them next.

    While we are on the subject, how much does an assembled head weigh in at? I've been quoted between $25 and $35 for shipping from various parts of the country on cylinder heads, if I knew the weight maybe I could get an idea about shipping cost on my own from a given area without needing to wait on the seller.

    Thanks,
    Andrew
    Last edited by Inf; 07-22-2003 at 11:52 PM.
    -Andrew

    03/72 240Z HLS30-70xxx - R.I.P. 2011/01/04

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Bookmarks

Posting Permissions

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