1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Power to turn camshaft?

Discussion in 'Technical Chat' started by blackbox, Mar 31, 2011.

  1. Mar 31, 2011 at 10:32 PM
    #1
    blackbox

    blackbox [OP] Well-Known Member

    Joined:
    Nov 17, 2009
    Member:
    #26062
    Messages:
    148
    Gender:
    Male
    SE Ohio
    Vehicle:
    2010 reg cab 4cyl 5mt 4x4 Pyrite
    Does anyone know offhand how much engine power is required to turn the camshaft on, say, a 2.7 16-valve engine? Just something I got to wondering about, google didn't even turn up anything useful, maybe my search terms were off. Some engine person must know this, thanks in advance.
     
  2. Apr 1, 2011 at 10:25 AM
    #2
    slo13zx3

    slo13zx3 Well-Known Member

    Joined:
    Dec 16, 2010
    Member:
    #47801
    Messages:
    305
    Gender:
    Male
    First Name:
    Brian
    forest city pa
    Vehicle:
    14 trd off 6speed nav
    1.1 kw per hr
     
  3. Apr 1, 2011 at 8:16 PM
    #3
    blackbox

    blackbox [OP] Well-Known Member

    Joined:
    Nov 17, 2009
    Member:
    #26062
    Messages:
    148
    Gender:
    Male
    SE Ohio
    Vehicle:
    2010 reg cab 4cyl 5mt 4x4 Pyrite
    1.1 kw = about 1.5 hp, I would think it takes more than that. Yeah, it would be the valves opening that would require the power. I suppose the springs on the closing valves would give some boost to the rotation of the camshaft, maybe 1.5 hp would be enough, I have no idea.
     
  4. Apr 1, 2011 at 8:20 PM
    #4
    tacomunchkin

    tacomunchkin Well-Known Member

    Joined:
    Aug 4, 2010
    Member:
    #41244
    Messages:
    63
    Gender:
    Male
    Navarre FL
    Vehicle:
    2010 TRD Offroad
    2010 4x4 Offroad TRD Crew cab 4.0 TRD Cat-Back exhaust CAI Avid offroad sliders and light bar PIAA 520 ATP lamps Leer bed shell
    1.21 Gigawatts!!
     
  5. Apr 1, 2011 at 10:32 PM
    #5
    slo13zx3

    slo13zx3 Well-Known Member

    Joined:
    Dec 16, 2010
    Member:
    #47801
    Messages:
    305
    Gender:
    Male
    First Name:
    Brian
    forest city pa
    Vehicle:
    14 trd off 6speed nav
    with a flux capacitor doing 88 miles per hr
     
  6. Apr 2, 2011 at 3:08 AM
    #6
    2TRunner

    2TRunner Don't give up here just yet

    Joined:
    Jul 30, 2010
    Member:
    #40980
    Messages:
    3,001
    Gender:
    Male
    First Name:
    Chris
    Around To Many People
    Vehicle:
    1, 2, 3, 4, 5 Lugs
    Brute Force Bumpers: rear & custom front tube, Saw-A-Way Racerunner 2.5 Coilovers with Total Chaos UCAs. Icon AAL.
    I would think the answer is that it does not take a lot of power/force for the engine to turn the camshaft.

    A camshaft not attached to it's timing belt/chain is moveable by hand. I had to torque a camshaft bolt to 36 ft. lbs and had to secure the cam so that when I was tightening the bolt, the cam wouldn't just spin.

    It shoudn't be difficult to put a ratchet & socket on the crankshaft bolt and be able to turn the engine over.

    I dunno....get a beam type torque wrench and socket, put it on the crank bolt and see where the reading is at when the engine starts to turn over.
     
To Top