Changed my plugs last night!
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

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 8 of 8
Cadillac Escalade, EXT and ESV Forum - 1999 - 2006 Discussion, Changed my plugs last night! in Cadillac Escalade Forums; I've had a slight stumble/miss when in gear and stopped. Slightly annoying, but no CEL's. So I grabbed some NGK ...
  1. #1
    Tylus's Avatar
    Tylus is offline Cadillac Owners Member
    Automobile(s): 2005 Escalade
    Join Date
    Dec 2013
    Location
    Pearl Harbor
    Age
    33
    Posts
    74

    Changed my plugs last night!

    I've had a slight stumble/miss when in gear and stopped. Slightly annoying, but no CEL's. So I grabbed some NGK plugs and went at her!

    Stupid rubber boots have been sealed on there, and I'm sure those were the factory plugs @ 66,000 miles. Took me over 2hrs to do the swap, man that was a bear to find access to #7 and #8 cylinders. I thought my Ford Modular motors were bad for access...wow

    Anyways, buttery smooth idle now while in gear and stopped. Hopefully see a little MPG gain as well, but I doubt it

    Drivers Side


    Passenger Side




    btw, just wanted to throw out there that there is no way in hell those are 100,000 mile plugs. I checked their gaps and it was on average 0.080. Those are platinum tip plugs and they are supposed to be 0.060 gap from factory. I put the new plugs in with a gap of 0.040 per the TSB since my new plugs were iridium tips.

    ----------

    I've never believed that 100,000 mile crap that Ford/Dodge/GM have gone to, and this illustrates it perfectly to me. I typically do a 2yr or 30,000 mile swap personally. Plugs are cheap, I think I paid $32 for a set of 8 "middle of the road" plugs for the 6.0.


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    the cadillac man's Avatar
    the cadillac man is offline Cadillac Owners 10000+ Posts
    Automobile(s): 03 cadillac escalade
    Join Date
    Mar 2011
    Location
    speedwell tn,
    Posts
    11,653
    I changed mine at 120,000 and I agree it did make a difference in the idle and power of the engine

  4. #3
    Johnny fox is offline Cadillac Owners Member
    Automobile(s): 2003 escalade esv
    Join Date
    Oct 2014
    Age
    37
    Posts
    49
    I changed mine here recently my budy was a mechanic at a gm dealership and said those are the original plugs they have a little over a 120,000 on them don't get me wrong they were at .060 thousandth's with the tip burnt completely off and the new ones are .040 thousandth's it ran good still I just wanted to check everything someone else neglected and my milage seemd low that was my last resort I can't believe it still ran on those plugs I never believed the 100,000 mile plugs either but I'm a believer now but I'm sure where you live and the type of fuel you get all makes a difference

  5. #4
    Johnny fox is offline Cadillac Owners Member
    Automobile(s): 2003 escalade esv
    Join Date
    Oct 2014
    Age
    37
    Posts
    49
    And I wish I can remember what he was telling me about ac Delco but it was something like there's actually 2 ac delcos the ones you buy at advance, auto zone or wherever aren't the real deal the tips and the white part around it are made from a different type of material either way the real deal delcos are way more expensive than anything you'll buy at a part store

  6. #5
    SugsPa is offline Cadillac Owners Member
    Automobile(s): 2006 Escalade, 2008 STS-V
    Join Date
    Jun 2013
    Location
    Paducah, KY
    Age
    60
    Posts
    41

    Re: Changed my plugs last night!

    I have 137K on my 06 on the original plugs. I know they've never been changed because I bought it new in June 06. I've been thinking about changing them but it still runs great. I have a set AC/Delco that I bought at Advance Auto, but now Johnny fox got me wondering if they are good set of plugs or a cheap imitation.

    SugsPa

  7. #6
    lonestranger is offline Cadillac Owners Fanatic
    Automobile(s): 05 Escalade ESV Platinum
    Join Date
    Dec 2005
    Location
    Bradenton FL
    Posts
    203

    CoolRe: Changed my plugs last night!

    Quote Originally Posted by Tylus View Post
    I've had a slight stumble/miss when in gear and stopped. Slightly annoying, but no CEL's. So I grabbed some NGK plugs and went at her!

    Stupid rubber boots have been sealed on there, and I'm sure those were the factory plugs @ 66,000 miles. Took me over 2hrs to do the swap, man that was a bear to find access to #7 and #8 cylinders. I thought my Ford Modular motors were bad for access...wow

    Anyways, buttery smooth idle now while in gear and stopped. Hopefully see a little MPG gain as well, but I doubt it

    Drivers Side


    Passenger Side




    btw, just wanted to throw out there that there is no way in hell those are 100,000 mile plugs. I checked their gaps and it was on average 0.080. Those are platinum tip plugs and they are supposed to be 0.060 gap from factory. I put the new plugs in with a gap of 0.040 per the TSB since my new plugs were iridium tips.

    ----------

    I've never believed that 100,000 mile crap that Ford/Dodge/GM have gone to, and this illustrates it perfectly to me. I typically do a 2yr or 30,000 mile swap personally. Plugs are cheap, I think I paid $32 for a set of 8 "middle of the road" plugs for the 6.0.
    It is better to attack this job with a new set of plug wires on hand. Both due to excellent chance of damaging one or more plug boots in trying to get them off, as well as if the plug wires are several years old, you should change them anyway. Plug wires wear out with time and may be the actual reason for an engine stumble! Also, don't just shop for the cheapest plug wires you can find. They live in a very hostile environment! Get the best you can find. Just my two cents worth!

  8. #7
    the cadillac man's Avatar
    the cadillac man is offline Cadillac Owners 10000+ Posts
    Automobile(s): 03 cadillac escalade
    Join Date
    Mar 2011
    Location
    speedwell tn,
    Posts
    11,653
    ^ I agree

    I didn't replace the wires when I did the plugs last time(starting to regret that decision) going to do both next time(when it comes up)

  9. #8
    NYS
    NYS is offline Cadillac Owners Member
    Join Date
    Jul 2012
    Posts
    36

    Re: Changed my plugs last night!

    Also, keep in mind that the original 41-985 spark plugs were Iridium, not Platinum.

    Iridium tips are tapered to be thinner. Some people see this gradual tapering at the very tip and think this is the result of the tip being "burned off", but this isn't the case at all. These aren't our father's spark plug tips. Our father's spark plug tips couldn't be tapered to such a thin point because the arc energy would indeed burn it off.

    However, it is to our advantage to have as tapered and as thin of a tip as possible, only we couldn't until cost effective Iridium deposition techniques were developed for spark plugs. Iridium's properties enabled spark plug tips to adopt a more ideal shape than older plugs of the past, or cheaper plugs (without Iridium) of today. The use of Iridium isn't just about making a longer lasting plug... that is just a corollary benefit. The advantage of Iridium is that it's properties enable a more ideal spark plug tip shape... tapered thinner and more pointed at the end.


    Here is a table that compares some physical characteristics and performance parameters between tip coatings on spark plugs:




    Here is a Family Handyman image that illustrates the difference between tip shapes from a conventional versus iridium tipped plug:




    Here is an NGK of Japan image close up of the tapering of the NGK (who manufacturers the ACDelco Iridium plugs) Iridium tip:


  10. Remove Advertisements
    Cadillac Forums
    Advertisements
     

+ Reply to Thread
Gear in this thread - Powered by O'Reilly Auto Parts

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

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

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Your date of birth and age are displayed in several places on the forum. Only the administrator will have access to your date of birth should you choose to hide it via the privacy option below.

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