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

Fitting intake camshaft into VVT phaser

Discussion in '2nd Gen. Tacomas (2005-2015)' started by foampile, Dec 20, 2021.

  1. Dec 20, 2021 at 4:54 PM
    #1
    foampile

    foampile [OP] Well-Known Member

    Joined:
    Dec 15, 2011
    Member:
    #68807
    Messages:
    1,081
    Gender:
    Male
    Mid-Atlantic
    Vehicle:
    2007 V6 4WD 6 speed Extended Cab
    When I installed my new replaced VVT phaser a few days ago, I fit the alignment stud from the intake camshaft into the hole that goes all the way through the phaser. Here is a picture of the new phaser from the front (facing the timing cover), green arrow.

    VVT-phaser-edit.jpg

    Now, notice there is another shaft right next to it marked with a red arrow, but that looks filled with a pin. The other side of that pin does not reach the surface on the other side IOW forms another hole the pin from the camshaft can also go into, and then another hole without a corresponding dot on the obverse, creating kind of a confusion which hole to use. It can be seen on this picture of my old VVT drum that I replaced:

    VVT-phaser-reverse.jpg

    I went with the green arrow (empty) hole, intuitively. The problem is the choice of hole determines the position of the camshaft relative to the timing sprocket and, even if the sprockets are aligned correctly, that camshaft will be a little lopsided de-synchronizing the valve timing.

    I think that's what might be happening because when any cylinder on that side of the engine is in TDC (top of the orange tape on the rod), the valves are not fully closed and I am able to blow through with my compression test hose that adapts to the spark plug threaded socket. It looks like the exhaust cam lobe is correctly positioned (closing the valve) but the intake is something like closing it but only like 80%, the cam is pushing the lifter however little still too much. The positions of the intake and exhaust valves looks asymmetrical and off by about as much angle as there are between the two holes in the VVT phaser. On the other side (which did not have a VVT phaser replacement), the valves are always closed when the cylinder is in TDC and the cam lobes are always symmetrical.

    TDC-left.jpg

    Assuming that I aligned all the markers on the sprockets correctly, which I am confident I did, is it possible that I messed up setting the camshaft pin in a wrong hole in the VVT phaser?
     
    Last edited: Dec 20, 2021

Products Discussed in

To Top