1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

98 so coupe b20 noises

Discussion in 'HYBRID -> EG-EK / DC' started by j_mullet, Jun 26, 2014.

  1. j_mullet

    j_mullet New Member

    Messages:
    9
    Likes Received:
    0
    Joined:
    Feb 19, 2014
    I have inherited a friends project car. As the title states its a b20b b18b heads, Crower stage 2 cams, skunk2 throttle body and intake manifold. The cat has been gutted with a greddy cat back exhaust. Gsr exhaust manifold and an eBay ecu chipped with knowing what the mods were.

    The problem is a rattle from 3500-4000 rpm. All heat shields have been removed. It almost sounds like header or valve train to me.

    Is it possible that a crank bearing could cause this? Kind of lost on this one not sure what it would be for sure.
     
  2. Briansol

    Briansol Admins Admin VIP

    Messages:
    21,456
    Likes Received:
    2,117
    Joined:
    Nov 18, 2007
    Location:
    CT
    Did you do valve springs/retainers when you did the cams too?
     
  3. j_mullet

    j_mullet New Member

    Messages:
    9
    Likes Received:
    0
    Joined:
    Feb 19, 2014
    From what I was told the springs have been done. But this is second hand info from the person that gave me the car. I thought that maybe it was the valves "floating" buy this goes away as the rpms get higher. I would imagine this problem would get worse as the rpms increase...not sure thought.
     
  4. Briansol

    Briansol Admins Admin VIP

    Messages:
    21,456
    Likes Received:
    2,117
    Joined:
    Nov 18, 2007
    Location:
    CT
    was the bottom end done at all? forged pistons can sometimes be noisey.
     
  5. j_mullet

    j_mullet New Member

    Messages:
    9
    Likes Received:
    0
    Joined:
    Feb 19, 2014
    Stock bottom end. I was planning to add zex in the near future. With this noise though it makes me nervous to do so.
     
  6. Briansol

    Briansol Admins Admin VIP

    Messages:
    21,456
    Likes Received:
    2,117
    Joined:
    Nov 18, 2007
    Location:
    CT
    Yeah, i'd hold off until you figure it out.

    Kinda hard to diagnose over the internet...
     
Verification:
Draft saved Draft deleted

Share This Page