Setting spark plug gap on Denso Iridium Twin plugs? - Kia Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old 03-18-2017, 08:09 AM Thread Starter
Full Member
 
Join Date: Nov 2012
Location: SW Florida
Posts: 132
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)

Thread Starter (Thread Starter)
Setting spark plug gap on Denso Iridium Twin plugs?

Well my Sportage EX recently turned over 51k miles and with the not so good mpgs and the wheel bearing problem I decided to order new Denso Iridium TT plugs. I received the order from Rock Auto and I was going to set the gap with my feeler gauge and when I took the cardboard sleeve off the electrode end of the plug I notice two twin spikes on the side electrode where you'd normally check the gap. I carefully found the gap was not set to what they said on Rock Auto so now I have ordered a new spark plug gap tool that has those 2 hooks to bend the electrode. The plugs came gapped to .032 and it was supposed to be .040 which I'm not sure it because it has the twin spikes on it as all other plugs for the 2.4l kia engine states the plugs should be set at .044". Has anyone ever had to set the gap on these delicate creatures yet? What are your tips for avoiding to ruin these expensive plugs by just setting the proper gap?

Sportage EX is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 03-18-2017, 08:27 AM
Newbie
 
mechanizeddeath's Avatar
 
Join Date: Mar 2017
Location: MI
Posts: 20
Drives: 2016 Forte5
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)

It's been ages since I last changed a plug other than a lawnmower, (my cars tend to get hit by careless drivers and totaled out before the plugs need replacement) but I was under the impression that most modern plugs come pre-gapped, except in the cases where one plug fits dozens of different engines.

Having said that, the only thing I can tell you is what you already know, be careful setting the gap because the plugs are quite fragile.

Also, RockAuto is awesome. I just ordered about 3 years worth of wiper blades for $20.
mechanizeddeath is offline  
post #3 of 13 (permalink) Old 03-18-2017, 10:11 AM
Super Moderator
 
DavesSpectra's Avatar
 
Join Date: Jan 2010
Location: Massillon, Ohio, USA
Posts: 6,290
Drives: 2007 SpectraLX, 2006 SpectraSX, Kubuntu
Gallery: 0
Mentioned: 20 Post(s)
Tagged: 1 Thread(s)
Quoted: 355 Post(s)

I would NOT attempt to change the "gap" on Iridium plugs... Because they have two spikes the equivalent gap may provide the same needed distance as a standard plug set for .044...
I'd suggest checking Denso's specs.. They are probably pregapped properly...

KIA and Hyundai highly recommend AGAINST using any strange design plugs... If they are the same design/brand as what was in the engine then the spark/ignition system would be optimized for those plugs... The wrong plugs can cause misfires and can set the CEL (check engine light)...
Dave
DavesSpectra is offline  
 
post #4 of 13 (permalink) Old 03-18-2017, 12:40 PM
Member
 
Join Date: Jul 2016
Location: Vancouver, BC
Posts: 69
Drives: Sportage LX AWD 2014, Forte LX+ 2014
Gallery: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)

If it's Denso 3478 FXU16HR11 Iridium they are supposed to come with 0.44" gap.
dubber09 is online now  
post #5 of 13 (permalink) Old 03-18-2017, 05:57 PM Thread Starter
Full Member
 
Join Date: Nov 2012
Location: SW Florida
Posts: 132
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)

Thread Starter (Thread Starter)
Quote:
Originally Posted by DavesSpectra View Post
I would NOT attempt to change the "gap" on Iridium plugs... Because they have two spikes the equivalent gap may provide the same needed distance as a standard plug set for .044...
I'd suggest checking Denso's specs.. They are probably pregapped properly...

KIA and Hyundai highly recommend AGAINST using any strange design plugs... If they are the same design/brand as what was in the engine then the spark/ignition system would be optimized for those plugs... The wrong plugs can cause misfires and can set the CEL (check engine light)...
Dave
So Denso's pre gap which is .036" (I rechecked again and I misspoke earlier) would be equivalent to a standard plugs .044"? I've always double checked the gap on new plugs before installing and this gave me pause.

I've read here on this forum that the original plugs are Denso Iridiums although I didn't go the extra mile by pulling my plugs first as I wanted to eliminate doing it twice. Since the originals are Denso Iridiums, the Twin Tip is the newest design and supposed to be superior for power and mpg than their regular Iridiums, and they are listed for this engine on the Rock Auto page for my year vehicle so I am assuming these are OK to use? Even at local auto stores they saw these as suitable replacements but couldn't tell me why there was a discrepancy as to why I was seeing a .036" gap when they show on their system it is supposed to be .040". They were basically saying the ones they get are pre gapped but have no idea what Rock Auto does.
Sportage EX is offline  
post #6 of 13 (permalink) Old 03-18-2017, 06:04 PM Thread Starter
Full Member
 
Join Date: Nov 2012
Location: SW Florida
Posts: 132
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)

Thread Starter (Thread Starter)
Quote:
Originally Posted by dubber09 View Post
If it's Denso 3478 FXU16HR11 Iridium they are supposed to come with 0.44" gap.
I don't see that number as being listed on Rock Auto for the Iridium plugs. They have 3 different Iridium plugs for the 2.4L engine listed:

3458 Denso Iridium Long Life .044"
5343 Denso Iridium Power .044"
4703 Denso Iridium TT .040"
Sportage EX is offline  
post #7 of 13 (permalink) Old 03-19-2017, 10:05 AM
Full Member
 
Join Date: Jun 2014
Location: N.Y.
Posts: 161
Drives: 2014 Sportage SX FWD
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 45 Post(s)

Quote:
Originally Posted by Sportage EX View Post
I don't see that number as being listed on Rock Auto for the Iridium plugs. They have 3 different Iridium plugs for the 2.4L engine listed:

3458 Denso Iridium Long Life .044"
5343 Denso Iridium Power .044"
4703 Denso Iridium TT .040"
As far as spark plugs go, If I have my choice between .004" tighter or looser I'll go with tighter every time.
However...
Don't over think a four thou of an inch difference. Just install them with a little bit of anti-seize and you'll be fine.
oldsport is offline  
post #8 of 13 (permalink) Old 03-19-2017, 10:30 AM Thread Starter
Full Member
 
Join Date: Nov 2012
Location: SW Florida
Posts: 132
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)

Thread Starter (Thread Starter)
Quote:
Originally Posted by oldsport View Post
As far as spark plugs go, If I have my choice between .004" tighter or looser I'll go with tighter every time.
However...
Don't over think a four thou of an inch difference. Just install them with a little bit of anti-seize and you'll be fine.
Should I just install them as-is since they are gapped from Denso at .036" not the .040" they say it is supposed to be, therefore making it .008" difference than Kia specs?
Sportage EX is offline  
post #9 of 13 (permalink) Old 03-19-2017, 11:48 AM
Member
 
Join Date: Jul 2016
Location: Vancouver, BC
Posts: 69
Drives: Sportage LX AWD 2014, Forte LX+ 2014
Gallery: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)

Quote:
Originally Posted by Sportage EX View Post
I don't see that number as being listed on Rock Auto for the Iridium plugs. They have 3 different Iridium plugs for the 2.4L engine listed:

3458 Denso Iridium Long Life .044"
5343 Denso Iridium Power .044"
4703 Denso Iridium TT .040"
You are right, sorry, I meant 3458 and 0.044" gap too.
dubber09 is online now  
post #10 of 13 (permalink) Old 03-19-2017, 02:13 PM
Veteran
 
aquanaut20's Avatar
 
Join Date: Jun 2010
Location: Fraser Valley, BC, Canada
Posts: 2,151
Drives: Caribou, Otter, Buffalo
Gallery: 0
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 148 Post(s)

This is the way I would handle the issue..

Install as supplied, then
Run a scope on the coil and get a spark wave form, If it displays good combustion, would leave as is...

But hey! thats just me..

... Philip
aquanaut20 is offline  
Reply

  Kia Forum > KIA Models > Kia Sportage Forum > 3G 2011 - 2016 Sportage



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On