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

New motor mounts install

Discussion in '70-Series Tech' started by jblueridge, Jul 22, 2016.

  1. jblueridge

    jblueridge SILVER Star

    Messages:
    1,290
    Likes Received:
    239
    Joined:
    Aug 12, 2014
    Location:
    Near Charlottesville, VA
    I want to replace my Bj74 mounts.
    Do I simply use a jack to lift things up enough to swap these out one at a time?
    Any secret snags or tricks?

    Thanks.
     
  2. Jarrat

    Jarrat

    Messages:
    136
    Likes Received:
    69
    Joined:
    Mar 28, 2015
    Location:
    Chilliwack, BC, Canada
    I recently did mine in my 2L-TE and the only suggestion I can do other than what you haven't said is keep a CLOSE eye on the rad hoses and wires when your lifting the engine up. I had my top coolant hose pop off when I did my mounts...
     
    JimmyPrado and roscoFJ73 like this.
  3. cruiserpilot

    cruiserpilot

    Messages:
    5,346
    Likes Received:
    1,632
    Joined:
    May 15, 2005
    Location:
    Ladysmith
    Yeah, the studs on each mount is about 1" long so you need some space. It might release a
    bit of leeway if you loosened the tcase mount as well. So the whole thing can shift with a bit less
    stress. My .02
     
    divemedic likes this.
  4. jblueridge

    jblueridge SILVER Star

    Messages:
    1,290
    Likes Received:
    239
    Joined:
    Aug 12, 2014
    Location:
    Near Charlottesville, VA
    Because the "standoffs" that the mounts bolt onto were so rusty, I unbolted them from the block and brought the rubber mounts out with them. Then I realized that I could get the starter out. Starter rebuild (by pros) should be finished Monday.

    I will be sure to check hoses and wiring for stress.
     
  5. deepseacruiser

    deepseacruiser

    Messages:
    285
    Media:
    5
    Albums:
    1
    Likes Received:
    15
    Joined:
    Jun 19, 2010
    Location:
    San Diego, CA
    jblueridge,

    how did the motor mount swap pan out? Did you notice a big difference in vibrations?
     
  6. Jarrat

    Jarrat

    Messages:
    136
    Likes Received:
    69
    Joined:
    Mar 28, 2015
    Location:
    Chilliwack, BC, Canada
    I didn't notice any difference when I did mine year ago... but my old mounts were in ok shape.
     
  7. jblueridge

    jblueridge SILVER Star

    Messages:
    1,290
    Likes Received:
    239
    Joined:
    Aug 12, 2014
    Location:
    Near Charlottesville, VA
    I see less vibration of the hood/bonnet.
    I apparently crushed a metal vac line when I jacked the engine up to get some space.
    Its the line that runs to the vacuum shutoff valve; it goes around the engine on the firewall side.
    I put in a new line as a repair.
     
  8. roscoFJ73

    roscoFJ73

    Messages:
    14,434
    Media:
    3
    Albums:
    1
    Likes Received:
    1,046
    Joined:
    Jul 22, 2003
    Location:
    Perth Western Australia
    When they get old they sometimes go soft, especially if they have been coated in engine oil. New mounts will make a difference, but probably not a big difference unless they are broken
     
    beno likes this.
  9. deepseacruiser

    deepseacruiser

    Messages:
    285
    Media:
    5
    Albums:
    1
    Likes Received:
    15
    Joined:
    Jun 19, 2010
    Location:
    San Diego, CA
    Yeah at over $300 to replace all three wanted to see if anyone has noticed a differ nice in vibrations. Seems like it should at almost 30 years old.
     
  10. bjowett

    bjowett Supporting Vendor

    Messages:
    3,498
    Likes Received:
    1,068
    Joined:
    Oct 28, 2002
    Location:
    Western Massachusetts
    Big 4 cylinder engines just shake. In addition to new mounts, I'll be trying to fit a hydraulic damper/shock. The 90's Camry and ES 300 utilized one of these.
     
  11. Dprio34

    Dprio34

    Messages:
    246
    Media:
    1
    Likes Received:
    113
    Joined:
    Oct 2, 2015
    Location:
    Las Vegas
    I think Rosco nailed it!

    No noticeable difference in vibration but possibly more of a jerk in the front end when you shut the motor off since the new ones are probably harder and transmit more energy to the frame.
    (At least it seems that way on mine). My front end noticeably moves when I key the engine OFF.

    Old Mount pictured below in the middle between the new mounts. It shrunk!
    DFC6983E-72E9-4456-B819-259B6A30B6DF.jpeg
     
    roscoFJ73 likes this.
  12. roscoFJ73

    roscoFJ73

    Messages:
    14,434
    Media:
    3
    Albums:
    1
    Likes Received:
    1,046
    Joined:
    Jul 22, 2003
    Location:
    Perth Western Australia
    Turning the idling up takes away a lot of vibration. I used to borrow a friends HJ45, an old railways owned work vehicle. At low idle it was like an earthquake in the cab, but turn it up 100-200 rpm ,it was smooth as a RR
     
    Tennessee Jed and Dprio34 like this.
  13. Tennessee Jed

    Tennessee Jed SILVER Star

    Messages:
    622
    Media:
    10
    Albums:
    1
    Likes Received:
    228
    Joined:
    Sep 11, 2009
    Location:
    East TN
    Mine is rough as heck on start up, but turn the AC on and it smooths right out until the engine's warm. Still gonna try to snag a set of motor mounts as I can see these becoming unobtainable and, like body mounts and bushings, go a long way to the car feeling "new" versus feeling like an old piece of junk.
     
  14. roscoFJ73

    roscoFJ73

    Messages:
    14,434
    Media:
    3
    Albums:
    1
    Likes Received:
    1,046
    Joined:
    Jul 22, 2003
    Location:
    Perth Western Australia
    The B engines are still big in developing countries. I think the mounts will be around for quite awhile yet. Body mounts suit all 7* series and they are still in production
     
  15. Tennessee Jed

    Tennessee Jed SILVER Star

    Messages:
    622
    Media:
    10
    Albums:
    1
    Likes Received:
    228
    Joined:
    Sep 11, 2009
    Location:
    East TN
    That's great to hear. Thanks. One less thing to worry about.
     
data-matched-content-rows-num="2,1" data-matched-content-columns-num="1,4" data-matched-content-ui-type="image_stacked" data-ad-format="autorelaxed">