Testarossa Bank 7-12 is it running? | FerrariChat

Testarossa Bank 7-12 is it running?

Discussion in 'Technical Q&A' started by swamthing, May 24, 2021.

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

  1. swamthing

    swamthing Rookie

    Apr 28, 2021
    12
    Full Name:
    Jonathan Clark
    I'm new to this car, according to service records engine out was done two years ago. I have no frame of reference to compare since it's my first.

    When inspecting the engine at idle I can see the shaft running going into the timing belt housing on bank 1-6. I don't see any movement on the similar for bank 7-12. Should I?

    Image Unavailable, Please Login
     
  2. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    7,085
    Central NJ
    Full Name:
    Dominick
    If the cams weren't moving the engine would be toast

    Probably not get a good angle/window to camshaft belt sockets

    Sent from my moto g power using Tapatalk
     
    85MondialQV likes this.
  3. raemin

    raemin Formula 3

    Jan 16, 2007
    2,388
    Lyon (FR)
    Full Name:
    R. Emin
    This is the sort of doubt I would try to clarify with a mechanic I can trust. Have you discussed these concerns with the professional who takes care of the car?

    To answer your question: highly unlikely, but I would hate to have such a doubt and no answer...
     
  4. Ferrari Tech

    Ferrari Tech Formula 3

    Mar 5, 2010
    1,233
    Georgia
    Full Name:
    Wade Williams
    It happens and that will definitely cause the 7-12 to not run. I recommend finding a very good Ferrari tech that is very familiar with older cars and have him look at it. If the cams have stopped, it will take some repair but it is repairable.
    You can remove the distributor cap and see if the rotor is turning when the starter is engaged.
    Text me if you like and I will help you find a solution. 770-845-8335
     
  5. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    7,085
    Central NJ
    Full Name:
    Dominick
    @Ferrari Tech

    I reason I said that is highly unlikely that the cams are not turning is that OP stated car is running .."inspection at idle"

    I don't think that our interference engine would allow one bank of cams to not be turning ..

    That is why I thought it was more of the way he was looking at movement

    Thoughts?

    Sent from my moto g power using Tapatalk
     
  6. swamthing

    swamthing Rookie

    Apr 28, 2021
    12
    Full Name:
    Jonathan Clark
    Guys appreciate the help. I had to use an inspection mirror to get a view. Tough angle. It seems to be spinning fine!
     
  7. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    7,085
    Central NJ
    Full Name:
    Dominick
    I kinda figured that was it

    Sent from my moto g power using Tapatalk
     
  8. swamthing

    swamthing Rookie

    Apr 28, 2021
    12
    Full Name:
    Jonathan Clark
    Thanks. Now I need to find someone good in the Boston MA area or New England that can take care of future things for me.
     
  9. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    7,085
    Central NJ
    Full Name:
    Dominick
    I would think if you post in the the new England section ..asking for experiences with local shops or dealers ..you will get some good leads



    Sent from my moto g power using Tapatalk
     
    swamthing likes this.
  10. Ferrari Tech

    Ferrari Tech Formula 3

    Mar 5, 2010
    1,233
    Georgia
    Full Name:
    Wade Williams
    Having been in the business for 25+ years I can tell you that a Testarossa will idle with just one side. It actually can idle pretty well and it is very smooth as it is a perfectly functioning 6 cylinder engine at that point. Same with a 308, I had a client bring in a 308 because it was down on power and "Just won't go like it used to."
    It was a four cylinder. Started right up, idled like it should but when you crack the throttle, It was sluggish.

    Very happy for the OP, that makes his life way less complicated.
     
    Qavion likes this.
  11. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    7,085
    Central NJ
    Full Name:
    Dominick
    No spark no fuel on one side is different than not rotating cams .. one is unnoticeable the other is very apparent

    Sent from my moto g power using Tapatalk
     
  12. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,288
    Cowboy Capitol of the World
    Full Name:
    Brian Crall
    #12 Rifledriver, May 26, 2021
    Last edited: May 26, 2021
    No it is not. I have experienced it several times. Why not?
     
    Ferrari Tech and 2NA like this.
  13. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    7,085
    Central NJ
    Full Name:
    Dominick
    Don't the valves hit the pistons and make a loud banging noise at least until the valves get bent out of way or connecting rod breaks off

    Sent from my moto g power using Tapatalk
     
  14. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,288
    Cowboy Capitol of the World
    Full Name:
    Brian Crall
    It makes no noise when they bend and in any event it takes 1 revolution for it to happen. How long does that take? Why would a rod break from the very small effort needed to bend a valve?

    Quit getting your knowledge from people saying stupid, uninformed stuff here.
     
    2NA and flash32 like this.
  15. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    7,085
    Central NJ
    Full Name:
    Dominick
    I will now to your knowledge but I do find it hard to believe that when a belt go and cams stop you will not experience more than a power loss ..there is gotta be oil , smoke , tapping noise etc

    If you say there isn't then i will admit I am wrong ..btw ..my statements in this forum have been spot on pretty much all my posts so i can be wrong once

    As always i thank you for your contribution and setting us all straight

    Sent from my moto g power using Tapatalk
     
  16. Ferrari Tech

    Ferrari Tech Formula 3

    Mar 5, 2010
    1,233
    Georgia
    Full Name:
    Wade Williams

    Rifledriver is right on this one. The valves are very small, pistons are forged and don't fail easily. I have reused the pistons after contact. They just push the valve out of the way and it usually only gets a cylinder of intake valves, a cylinder of exhaust. In the cycle of running, once the belt breaks, there is no momentum like there would be in a failure on the crank area. Cams just stop and whatever is open gets bent out of the way.

    I was in the shop one Monday morning when a 78 308 carb car was started to move out. The air pump had rusted over the weekend and locked. It snapped the cam belt and I heard it. No big bang, just a change in engine sound and it was on four cylinders. I waved at the porter and told him to shut it off. We started it again later and drove it to the lift. One intake valve and one exhaust valve is all it damaged.

    If you have one or two cylinders down it causes a skip sound. Half of the engine down will still be very smooth running. Just way down on power.
     
    tazz99 and flash32 like this.

Share This Page