Suffering brain fade on the rebuild. | FerrariChat

Suffering brain fade on the rebuild.

Discussion in '308/328' started by AREA, Mar 3, 2015.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. AREA

    AREA Rookie

    Apr 10, 2009
    16
    Have just refitted heads on 2v 308 after replacing exhaust valves

    Maybe I've spent too long in the garage today but can't figure out why when I refit the old cambelts (yes, I am going to fit new, just want to make sure everything is lined up first) both front and rear banks cam pulleys are sitting c. half a pulley tooth out.

    Flywheel is is on PM 1-4 and have used dial gauge just to double check cylinder 1 at absolute TDC. Marks on all 4 cams spot on with the notch on the cam caps. And they were all perfectly lined up when I stripped the top end down.

    Before I adjust using the dowel pin, has my addled brain missed something obvious ?
     
  2. yelcab

    yelcab F1 World Champ
    Consultant

    Nov 29, 2001
    13,566
    San Carlos, CA
    Full Name:
    Mitchell Le
    I don't know what you did so I can't tell you. Just go back to basic.

    1. Ensure TDC 1
    2. Ensure all cam shafts are in the right positions
    3. Ensure all cam marks are lined up
    4. Install the new belt, tweek the dowel pins to get it tight
    5. Tension the belt, whichever way floats your boat.
     
  3. MNExotics

    MNExotics F1 Rookie
    BANNED

    Dec 13, 2010
    2,631
    Good Thunder
    Full Name:
    Ben Gruenzner
    #3 MNExotics, Mar 3, 2015
    Last edited: Mar 3, 2015
    New head gaskets can change the geometry. Put the belts on as close to the marks. New valves will need to be relashed. From there retime all for cams. The notches are for reference at best.
     

Share This Page