NGK Spark plugs & coolant level message - 2003 Deville
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 7 of 7
Northstar Engines and System Technical Discussion Discussion, NGK Spark plugs & coolant level message - 2003 Deville in Cadillac Engine Technical Discussion; I'm looking at NGK V-Power (Part # 3951) from Advance Autoparts as replacements for my 2003 Deville I just bought. ...
  1. #1
    PaulGoldstraw is offline Cadillac Owners Member
    Automobile(s): 2003 Deville
    Join Date
    Jun 2014
    Age
    52
    Posts
    1

    NGK Spark plugs & coolant level message - 2003 Deville

    I'm looking at NGK V-Power (Part # 3951) from Advance Autoparts as replacements for my 2003 Deville I just bought. Are these good spark plugs for this engine?
    Also - I'm getting a "Check coolant level" message. The level is fine so I'm thinking the sensor is clogged up and unable to detect properly - This happened on my Pontiac Grand Prix GTP because of the Dex-cool antifreeze clogging things up. How easy is it to drain the cooling system (ie. Is there a drain plug or is it done by disconnecting a radiator hose?) and are there any special procedures that need to be followed when refilling (like on the 3800 series 2 on the Grand Prix)?

    Thanks for your help

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, slap in a big stereo
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
    Join Date
    Feb 2006
    Location
    MD Eastern Shore - Kent Island
    Age
    74
    Posts
    43,445

    Re: NGK Spark plugs

    Use AC Delco #41-987 Double Platinum plugs. For some reason the Northstar is finicky about what/which plugs it likes. Pictures and diagrams in my albums. Comunity tab ^^^, Albums, the red Seville.

    www.rockauto.com

    Cooling system drain/fill/purge line checks in Tech Tips and in here - lots of times. The system is a royal PITA to drain due to the inaccessible location of the drain plug in the bottom of the driver's side radiator end tank. Refill takes about 10 - 12 quarts of 50/50 coolant. Mix your own. Proper level is halfway full in the surge tank, cold only.

    Sometimes the coolant level sensor magnetic float hangs up and can be freed with surge tank removal and soapy water agitation and good rinse. Other times it requires tank replacement. About $57, shipped.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    72,325

    Re: NGK Spark plugs

    Dex doesn't clog anything up. It's simply a failing level sensor. No need to drain the system (unless you are due for a coolant change). Simply siphon the surge tank and then change it. Just did mine a few weeks ago.

  5. #4
    eldoedwardo is offline Cadillac Owners Fanatic
    Automobile(s): '99 Eldorado coupe
    Join Date
    Mar 2011
    Location
    KCMO
    Age
    60
    Posts
    131

    Re: NGK Spark plugs & coolant level message - 2003 Deville

    radiator drains ARE a pain. I made mine a bit easier by using an old broom handle. cut it to approx.5-6 inches or
    whatever works for you. take the cut end and cut a groove in it wide enough for the plug. use it for an extension.
    If you are going to collect the coolant, don't bother use that time to find your garden hose. something square works also but don't be tempted to us a tool ,just your hand, not both.you'll see
    Ed

  6. #5
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    72,325

    Re: NGK Spark plugs & coolant level message - 2003 Deville

    Made my first one out of dowel rod, but it broke so I made a nicer one.
    Attached Images

  7. #6
    maeng9981's Avatar
    maeng9981 is offline Cadillac Owners Connoisseur
    Automobile(s): 14 SRX, 12 Sierra, 00 SLS, 99 Deville 50-year Anniversary
    Join Date
    Mar 2009
    Location
    Dallas, TX
    Age
    23
    Posts
    3,007

    Re: NGK Spark plugs & coolant level message - 2003 Deville

    Isn't it easier on a 03? I believe 03 has the 19mm plastic plug onthe bottom with an access hole.

  8. #7
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    72,325

    Re: NGK Spark plugs & coolant level message - 2003 Deville

    I believe you are correct.

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