Announcement

Collapse
No announcement yet.

3.4 DOHC Heads on a 3x00 Block

Collapse
X
Collapse
 

  • 3.4 DOHC Heads on a 3x00 Block

    Several people have talked about the possibility to use the 3.4 DOHC heads on the 3x00 engines. Some for performance, and some for replacment, where getting a 3.4 DOHC block might be difficult, but getting a 3400 (or even a 3100) block might be easier to come by.
    For these test fittings, I used a 1994 3.4 DOHC BLOCK, a 1994 3.4 DOHC REAR head, a 1999 3100 SFI BLOCK, and a 1996 3100 SFI head.
    This article is broken into 3 sections.
    • The first section is BASIC COMPARISONS where I compare the BLOCK of the 1994 3.4 DOHC, and the 1999 3100 SFI.
    • The second section is a 1994 3.4 DOHC head on a 1999 3100 SFI block.
    • The third section is a 1996 3100 SFI head on a 1994 3.4 DOHC block.

    This is the BASIC COMPARISONS between the 1994 3.4 DOHC, and the 1999 3100 SFI.
    This is a bare 3.4 DOHC block
    And this is a bare 3100 SFI block
    One of the biggest NOTICEABLE differences is the OIL VALLEY. The 3.4 DOHC does not have lifter holes, and it has a cover on it. When the engine is ASSEMBELED, the valley is actually OPEN to the air, and not sealed off like the 3100. The 3.4 DOHC has that cover on it to keep anything from getting in there.
    Here is the cover on a 3.4 DOHC
    This is me holding the cover in place on a 3100 block
     
      Posting comments is disabled.

    Article Tags

    Collapse

    There are no tags yet.

    Latest Articles

    Collapse

    • LQ1 Service Bulletin 57-61-09 Lifter tick (cold)
      by Schurkey
      Dug up the GM Service Bulletin for "Lifter tick when cold", 57-61-09. '91 to '95 LQ1 (VIN X)

      http://mymonte.com/discussion/topic/...e-%2357-61-09/ The parts kit has been discontinued by GM long ago. My quest was to find sources for those parts; and complete the procedure on my '93 Lumina Euro 3.4 which was torn apart to replace the rear head gasket. There are three critical part numbers in the GM service kit (aside from gaskets and O-rings) required t...
      03-02-2012, 02:48 PM
    • 3.4 DOHC Heads on a 3x00 Block
      by bszopi
      Several people have talked about the possibility to use the 3.4 DOHC heads on the 3x00 engines. Some for performance, and some for replacment, where getting a 3.4 DOHC block might be difficult, but getting a 3400 (or even a 3100) block might be easier to come by. For these test fittings, I used a 1994 3.4 DOHC BLOCK, a 1994 3.4 DOHC REAR head, a 1999 3100 SFI BLOCK, and a 1996 3100 SFI head. This article is broken into 3 sections. The first section is BASIC COMPARISONS where I compare the BLOCK o...
      01-20-2011, 12:08 PM
    • 3.4L (DOHC) Specifications
      by bszopi
      ...
      06-15-2010, 05:56 PM
    • OBD2 Tuning 3.4 DOHC
      by Dave96z34
      The 97 4T65 in the Monte Carlo is almost bullet proof. I have been beating the crap out of my reman with my blower now for 2.5 years of daily driving vs the 60 NA that I couldn't get 1 year out of. 4 Trans in 50K miles. I'm a violent offender. Overfilling and royal purple atf are my secret. DHP will do 96 and 97 DOHC tuning, HPTuners only works with the 97 computer. 96 can not change line pressure, 97 can. 97 bin is double in size of the 96 bin. They changed every thing and it has every ...
      04-17-2010, 04:53 AM
    • 3.4 DOHC Pistons
      by SappySE107
      Here is the TRW catalogue spec sheet for the 91-95 as well as the 96/97 pistons.

      TRW 3.4 DOHC Pistons
      Silvolite 3.4 DOHC Pistons Notice that the 96-97 pistons don't have as much compression distance but also have a dome to them. I dont know the exact amount of compression loss you will get when using these pistons with the 91-95 heads, but it goes against the common belief that 96 pistons raise compression. The Silvolite pistons are the EXACT pistons used in the 91-
      ...
      04-14-2010, 01:23 AM
    • 96/97 3.4 DDOHC Intake Manifold Swap for 91-95 Engines
      by OldSkoolGP
      Pictures can befound here * Need to find this album *
      http://60degreev6.com/gallery/browseimages.php?c=27 Having just completed this swap myself and being MORE than impressed with the results, I felt the need to write up how to properly do this swap so everyone else can do it easily: First off, here are the major components you will need from your donor motor: Upper Intake (Plenum) Lower Intake and fuel rail ’96 Rear Cam Carrier Cover (Valve Cover) Intake pipe Throttle Bo...
      04-14-2010, 01:20 AM
    Working...
    X