Results 1 to 9 of 9

Thread: small block chevy

  1. #1
    Junior Member JOURNEYMAN
    Join Date
    Aug 2005
    Posts
    29

    small block chevy

    i have a 377 and just found out number 7 cylinder is dead no compression took it apart and can find nothing visully wrong can anybody tell me what to do next or if u have had this problem and what i need to do to fix it thanks guys

  2. #2
    Senior Member DYNO OPERATOR
    Join Date
    Aug 2005
    Location
    Rifle Colorado
    Posts
    585
    A leak down test could have told where the compression was going before you took it apart. With no compression at all, you probably have a valve that is bent or not seating. Try filling the #7 ports or combustion chamber with water or solvent and see if the valves hold....

  3. #3
    Junior Member JOURNEYMAN
    Join Date
    Aug 2005
    Posts
    29

    small block chevy

    thanks i did put fluid in ports the intake leaked right away so does that mean a valve job then all fixed??

  4. #4
    Senior Member DYNO OPERATOR
    Join Date
    Aug 2005
    Location
    Rifle Colorado
    Posts
    585
    I'd get that fixed, bolt the head back on and perform a leak down test to confirm that the rest is ok. Might be best to make sure your piston to valve clearance is good if the valve is bent.....

  5. #5
    Member MASTER JOURNEYMAN
    Join Date
    Mar 2003
    Location
    Leavenworth, Kansas
    Posts
    35
    I always run a leak down test before I pull them apart. You can get alot of info from that test.

  6. #6
    Junior Member JOURNEYMAN
    Join Date
    Aug 2005
    Posts
    29

    small block chevy

    thanks for the info i have another set of heads gonna bolt them on and see what happens and do the leakdown test i hope all is good any more info would always help

  7. #7
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
    Location
    La.
    Posts
    2,890
    Quote Originally Posted by johnracer
    I'd get that fixed, bolt the head back on and perform a leak down test to confirm that the rest is ok. Might be best to make sure your piston to valve clearance is good if the valve is bent.....
    X2,

    it's hard to realize that (O) compression can not be seen if it's valves, they should be bent really bad.
    Let us know what you found?

    Zip.

  8. #8
    Junior Member JOURNEYMAN
    Join Date
    Aug 2005
    Posts
    29

    small block chevy

    i bolted on another head and got compression so i know its in the head so i am taking the heads in for a valve job and check for cracks thanks guys for your input have a great day

  9. #9
    Junior Member JOURNEYMAN
    Join Date
    Aug 2005
    Posts
    29

    small block chevy

    thanks guys motor all back together and running good just some fine tuning and be ready to race thanks agian

  10. Racing Junk


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Copyright © 2005-2016 RacingJunk.com All Rights Reserved.

Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the RacingJunk.com
Terms of Use, Classifieds Disclaimer, Privacy Policy, and Cookie Policy