flickering oil light
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
Results 1 to 4 of 4
Northstar Engines and System Technical Discussion Discussion, flickering oil light in Cadillac Engine Technical Discussion; At times - at idle - the oil light flickers on my 96DeVille. Never see it while driving and I ...
  1. #1
    krimson_cardnal's Avatar
    krimson_cardnal is offline Cadillac Owners Enthusiast
    Automobile(s): 96DeVille
    Join Date
    Aug 2005
    Location
    NY Capitol District
    Age
    67
    Posts
    962

    flickering oil light

    At times - at idle - the oil light flickers on my 96DeVille. Never see it while driving and I can't corrolate the times I do see it at idle. Not frequent by any means, just want to be sure it doesn't get to that point.

    Any ideas -thoughts? Me thinks it might be the pressure sensor, but I know not of that beastie.

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    mcowden is offline Cadillac Owners Connoisseur
    Join Date
    Jun 2003
    Posts
    1,164

    Re: flickering oil light

    Quote Originally Posted by krimson_cardnal
    At times - at idle - the oil light flickers on my 96DeVille. Never see it while driving and I can't corrolate the times I do see it at idle. Not frequent by any means, just want to be sure it doesn't get to that point.

    Any ideas -thoughts? Me thinks it might be the pressure sensor, but I know not of that beastie.
    A few thoughts on this one. This isn't the first time it's come up, so I'll just rehash what I remember from previous attempts:

    The oil pressure sensor is mounted above the oil filter adapter. If you replace it, use an OEM sensor by AC-Delco.

    Make sure you're using a good quality oil filter. Stay away from standard Fram filters. Use something like a Wix, Purolator PureONE or Premium Plus, AC-Delco, Mobil1, Bosch, etc. I personally like the PureONE, AC-Delco, and Mobil1 filters. Cheap, low-quality filters may have a sufficient pressure drop across the filter to drop the already-low idle oil pressure to a low enough level to trip the sensor. Check out the links at the bottom of this message for a couple of reviews.

    The oil pump is driven by compression between the harmonic balancer and oil pump. If the bolt is a little loose, it might not be driving the oil pump sufficiently at idle.

    One very qualified expert who used to frequent the forums suggested using Shell Rotella 15W-40 motor oil to help with problems like this. Several others have done this with good success. Personally, I'm not sure I like this idea, especially in winter in cold climate areas (like Chicago or Fairbanks, AK). Then again, I'm certainly no expert. It just seems to me like 15W-40 might be a little on the viscous side to give sufficient protection or crank speeds in cold weather. I'm open to discussion on this one, for sure.

    Here are the oil filter review links:

    http://www.ntpog.org/reviews/filters/filters.shtml
    http://minimopar.knizefamily.net/oilfilterstudy.html

    Let us know what you do and how it turns out. I'm sure there are several people here who can help a lot more than I can...
    Mike

  4. #3
    krimson_cardnal's Avatar
    krimson_cardnal is offline Cadillac Owners Enthusiast
    Automobile(s): 96DeVille
    Join Date
    Aug 2005
    Location
    NY Capitol District
    Age
    67
    Posts
    962
    Thread Starter

    Re: flickering oil light

    Thanks again,
    I'm ordering a new pressure sensor, will install next oil change. Great info on the filter issue, AC_Delco - all around.

    Question on the harmonic balancer thing. Is this something accessable? Shop manual doesn't make it clear - to me... Looking things over, this seems like a long shot, but you seem convinced of it's possibility. I'm supposed to be able to see this bolt w/ vehicle up. Guidance?? What might I look for??

  5. #4
    mcowden is offline Cadillac Owners Connoisseur
    Join Date
    Jun 2003
    Posts
    1,164

    Re: flickering oil light

    Quote Originally Posted by krimson_cardnal
    Thanks again,
    I'm ordering a new pressure sensor, will install next oil change. Great info on the filter issue, AC_Delco - all around.

    Question on the harmonic balancer thing. Is this something accessable? Shop manual doesn't make it clear - to me... Looking things over, this seems like a long shot, but you seem convinced of it's possibility. I'm supposed to be able to see this bolt w/ vehicle up. Guidance?? What might I look for??
    I would say it is a long shot, but if it's easy enough to check it, it can't hurt anything. The harmonic balancer is on the end of the crankshaft on the accessory-side of the engine. It's the large pulley at bottom center. If you take the fenderwell plastic out of the way, you should be able to get to it pretty easily. I don't know the torque spec, but it's pretty high IIRC. If you don't have a torque wrench or can't easily identify or get to it, don't worry about it. install the new sensor, use a good filter, and try the Rotella oil. If the problem gets worse, then get the harmonic balancer bolt checked.
    Mike

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