Intake Manifold Bolts - Page 2
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Page 2 of 6 FirstFirst 1 2 3 4 5 6 LastLast
Results 16 to 30 of 85
Like Tree8Likes
Cadillac STS Forum - 2005 through 2012 Discussion, Intake Manifold Bolts in Past Cadillac Vehicle Discussion; Originally Posted by Dj Brady Close, but I park my car with the nose to the south. You got one ...
  1. #16
    ddalder's Avatar
    ddalder is offline Cadillac Owners Connoisseur
    Automobile(s): 2008 STS-4 N* 1SG
    Join Date
    Aug 2008
    Location
    Canada
    Posts
    2,008

    Re: Intake Manifold Bolts

    Quote Originally Posted by Dj Brady View Post
    Close, but I park my car with the nose to the south.
    You got one of those?

    This help?

  2. #17
    AnderbrA is offline Cadillac Owners Member
    Automobile(s): 2007 Cadillac STS V8
    Join Date
    May 2008
    Location
    Sioux Falls, SD
    Posts
    95

    Re: Intake Manifold Bolts

    This whole thing had me curious...so over lunch I ran home and checked. To my astonishment, 9 of the 10 bolts were loose, with one almost ready to fall out. (pictured 2nd from firewall on drivers side) IMG00814-20110906-1501.jpg

    My STS is an 07 with shy of 98k. I couldn't believe these could come loose in less than 5 years.

    Amazingly this 5 minute fix immediately solved a number of issues.
    Rough idle and startup after car sat overnight.
    Hesitation in lower RPM. 700-1500
    Erratic shifting patterns, rough shift.

    I highly recommend everyone checks this out...should almost be sticky. Thus the beauty of an enthusiast forum.

  3. #18
    Dj Brady is offline Cadillac Owners Member
    Automobile(s): 2005 N* STS4
    Join Date
    Aug 2011
    Location
    Wilmore, Ky
    Age
    40
    Posts
    69

    Re: Intake Manifold Bolts

    Quote Originally Posted by ddalder View Post
    This help?
    much better.. let me go grab my mirror now.

  4. #19
    AllWheelEric is offline Cadillac Owners Fanatic
    Automobile(s): 2005 STS4 1SG
    Join Date
    Jan 2006
    Posts
    361

    Re: Intake Manifold Bolts

    Thanks for the advice, mkmarsilio, ddalder, and everyone else! I checked mine today and found they were very loose! I could tighten them with my fingers, if I had twisty little long skinny fingers. I have to go out tomorrow and find something like an articulating 3/8" extension, because I didn't have enough clearance to get my socket on most of the bolts. Harbor Freight is an hour away, but I'm sure they will have something, and I could use a motorcycle ride.

    Once again, very nice job to the forum members. Shame on Cadillac.

  5. #20
    Lifer's Avatar
    Lifer is offline Cadillac Owners Enthusiast
    Automobile(s): 2006 Cadillac STS 1SG, 2001 Cadillac Eldorado ETC
    Join Date
    Apr 2007
    Location
    Coppell, TX
    Posts
    892

    Re: Intake Manifold Bolts

    What do you know... 06 STS Northstar, 57,000 care-free miles. Checked the intake manifold bolts and had 10 out of ten loose to real loose. Tough to get to. Needed 10mm socket, flex adapter, and open end wrench. 10 minutes, and all better. Runs smoother now.

    How can Government (was the General once) Motors build them so sloppy? Perhaps this is one of reasons they had to use my money to bail them out.

  6. #21
    Lifer's Avatar
    Lifer is offline Cadillac Owners Enthusiast
    Automobile(s): 2006 Cadillac STS 1SG, 2001 Cadillac Eldorado ETC
    Join Date
    Apr 2007
    Location
    Coppell, TX
    Posts
    892

    Re: Intake Manifold Bolts

    Its only been a few days, but I have had a noticeable improvement in gas mileage. It was around 13.5 average for city - suburb driving, but now I am around 19.5. Next would be a road trip. My last on in August averaged 21 miles to the gallon.

  7. #22
    stevenriz is offline Cadillac Owners Fanatic
    Automobile(s): 2008 STS4 V8 1SG Platinum Edition
    Join Date
    Apr 2009
    Location
    Central MA
    Age
    47
    Posts
    334

    Re: Intake Manifold Bolts

    I did this as well last weekend to try and fix a stalling/misfire during off the line acceleration. The car does not stall now but does a funny acceleration like this... RUMM RUMM RUMM RUMM RUMM when going halfway on the pedal. Once I let off if smooths out. It is a little peppier and gas mileage has improved. I still need to have that checked. Other members suggested a clogged catalytic converter and/or bad/clogged fuel pump/filter...

  8. #23
    DitkaFan is offline Cadillac Owners Member
    Automobile(s): 08 STS-4 V6DI
    Join Date
    Feb 2011
    Posts
    76

    Re: Intake Manifold Bolts

    I know quite a few people have verified this issue with the V8 N*s. But has anyone verified this is/isn't an issue with the V6s? Also does anyone have a diagram for the V6DI like was posted for the N*.

    Thanks.

  9. #24
    Dj Brady is offline Cadillac Owners Member
    Automobile(s): 2005 N* STS4
    Join Date
    Aug 2011
    Location
    Wilmore, Ky
    Age
    40
    Posts
    69

    Re: Intake Manifold Bolts

    Checked mine tonight. Most were finger loose, 3 were at least 3 threads out. Can't wait to see what it does for mileage. Can't say that "enriching" the combustion is going to do much for power though. leaner is always hotter..

  10. #25
    GREGB1954 is offline Cadillac Owners Member
    Automobile(s): '06 STS N* 1SG Pkg, blk/blk
    Join Date
    Nov 2010
    Location
    Indy
    Posts
    53

    Re: Intake Manifold Bolts

    Just tightened the bolts on our '06 STS N* with 54k miles. All 10 were loose. Done in 10 min. Runs and shifts great now. This is a must do. I am going to check them every 10,000 mi or so.

    I could not get a socket on bolt #1 per diagram, so I used an open end 10mm wrench which is not ideal. So I will buy a crow foot wrench, or else remove the fuel rail. The other 9 bolts were easily reached with a 1/4" socket (10mm), with a std universal, then a 6" extension to my torque wrench.

    It might make sense to use an appropriate Loctite product. I wonder if there is a technical bulletin on this??

  11. #26
    nathanjax's Avatar
    nathanjax is offline Cadillac Owners Connoisseur
    Automobile(s): 2007 esKONali
    Join Date
    May 2004
    Location
    Jax, FL
    Age
    34
    Posts
    1,100

    Re: Intake Manifold Bolts

    Just tightened up mine. All 10 were loose. 2 or 3 i could tighten with my finger. 1 was about to fall out...

  12. #27
    chazglenn3's Avatar
    chazglenn3 is offline Cadillac Owners Connoisseur
    Automobile(s): 2005 White Diamond STS N* 1SF RWD ACC/HUD
    Join Date
    Sep 2004
    Location
    Tacoma, WA
    Age
    52
    Posts
    1,927

    Re: Intake Manifold Bolts

    I'm planning to do this soon, and was just thinking about removing the fuel rail. I'll have to think about it. I did a quick check and found a couple loose.

  13. #28
    kschwed is offline Cadillac Owners Fanatic
    Automobile(s): 2006 Cadillac STS 1SC
    Join Date
    Nov 2009
    Location
    California
    Age
    26
    Posts
    383

    Re: Intake Manifold Bolts

    Does this apply to the V6 also?

  14. #29
    chazglenn3's Avatar
    chazglenn3 is offline Cadillac Owners Connoisseur
    Automobile(s): 2005 White Diamond STS N* 1SF RWD ACC/HUD
    Join Date
    Sep 2004
    Location
    Tacoma, WA
    Age
    52
    Posts
    1,927

    Re: Intake Manifold Bolts

    This appears to be a NorthStar issue...

  15. #30
    Subsailor613's Avatar
    Subsailor613 is offline Cadillac Owners Enthusiast
    Automobile(s): 2006 STS 1SF N* RWD NAV F55
    Join Date
    Mar 2009
    Location
    NC for Now, Florida SOON
    Posts
    536

    Cool Re: Intake Manifold Bolts

    I stand corrected: I got bum dope.
    for the V8 it's 89 in/lb ! Or
    7.2 Ft/Lb.
    Sorry !

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting