Author Topic: Engine Shakin  (Read 2083 times)

0 Members and 1 Guest are viewing this topic.

Offline smokin-6

  • 87 T
  • Bone Stock
  • **
  • Posts: 38
  • PSI: 0
    • View Profile
Engine Shakin
« on: September 12 2012, 08:07:24 AM »
I notice my new engine shakes more than the stock one. I have a factory short block with a 212/212 roller and ported heads. My Scanmaster #'s at hot idle are TPS-.42/ IAC-23/ BL-125 and oil pressure is 37. It seems to idle fairly steady but it shakes in the mounts more than the original motor. New stock motor mounts (had them with the old engine) Is this because the cam is bigger??
87 T Ported stock heads, 212/212 roller, stock block, ALKY, CAS V4, 6262, 3.5 MAF & Translator, new tranny w/ 9-11
Original owner

Offline Steve Wood

  • Turbo Street Outlaw
  • *******
  • Posts: 9890
  • PSI: 34
    • View Profile
    • http://www.vortexbuicks-etc.com/
Re: Engine Shakin
« Reply #1 on: September 12 2012, 09:44:47 AM »
Would be my first thought.....if the vacuum is lower, but pretty steady, that would make sense.

You can always try pulling injector connectors, one at a time, to see if you find a cylinder that is not affected much
Steve Wood

http://www.vortexbuicks-etc.com

A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline ULYCYC

  • Turbo Street Modified
  • *****
  • Posts: 870
  • PSI: 4
    • View Profile
Re: Engine Shakin
« Reply #2 on: September 12 2012, 11:45:25 AM »
Improper valve lash with news cams and head work will do it.  I assume you check for proper push rod length?  But I would start simple like Steve suggested.  Plug, ign wire, vacuum leak, cam sensor 180* out
ED BAKER
87-T, Maplight equipped rear view mirror..
01 Park Ave Ultra S\'charged
BPG#1458

Offline I Love Factory ECMs

  • GIMP
  • Turbo Street Limited
  • ***
  • Posts: 105
  • PSI: -16
  • Boost n00b
    • View Profile
Re: Engine Shakin
« Reply #3 on: September 14 2012, 04:42:43 PM »
 It's the new "Buggata Buggata Buggata" lobing cam? Have Poly Urathan drivers side Motor Mount? If not there good investment,beats the "Tie Down strap"

 

SimplePortal 2.3.7 © 2008-2024, SimplePortal