Spark plug change?

Tiny
RIEBE123
  • MEMBER
  • 2011 KIA SORENTO
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
I need to change the spark plugs, I understand the intake needs to be removed to get at the three plugs in the rear of the engine. My question is, how involved is this? How much time should I plan for? How many bolts must be removed? When I replace the gasket what is the gasket for or what set do I order?
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Monday, September 10th, 2018 AT 3:12 PM

20 Replies

Tiny
DL AUTOSHOP
  • MEMBER
Hello, I am Danny.

Yes, you do have to remove the intake manifold to gain access to the rear three spark plugs. It will take you roughly three hours to complete as the book calls for 2.2 hours. The gasket you need to replace is simply called the intake manifold gasket. The intake manifold itself is held on by nine bolts however, a bunch of accessories will need to be removed. If you feel confident in performing this I can attach step-by-step pictures if you like. Hope this helps and thanks for using 2CarPros.
Danny-
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Monday, September 10th, 2018 AT 5:23 PM
Tiny
DAVE1310
  • MEMBER
Thanks for the response. Yes, I know I can change the plugs. Please send me the step by step instructions. I really appreciate your help again, it is my daughters vehicle and I want to help her out.
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Wednesday, September 12th, 2018 AT 12:22 PM
Tiny
DAVE1310
  • MEMBER
Please send me the step by step instructions for the removal/replacement procedure.
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Thursday, September 13th, 2018 AT 2:32 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi and thanks for using 2CarPros. Com.

Here are the directions for removing the intake manifold to access the plugs in the rear. All attached pictures correlate with these directions.

_______________________________

REPAIR PROCEDURES
Removal and Installation

1. Disconnect the battery negative terminal.
2. Remove the engine cover (A).
3. Remove the air duct (B).
4. Remove the air cleaner assembly.
(1)Disconnect the breather hose (A) and the BARO sensor connector (B).
(2)Disconnect the air intake hose and then remove the air cleaner assembly (C).

Tightening torque
Hose clamp bolt:
2.9 - 4.9N.M (0.3 - 0.5kgf.M, 2.2 - 3.6lb-ft)
Air cleaner assembly bolts:
7.8 - 9.8N.M (0.8 - 1.0kgf.M, 5.8 - 7.2lb-ft)
5. Remove the under cover.
6. Loosen the drain plug (A), and drain the coolant. Remove the radiator cap to speed draining.
7. Disconnect the wiring connectors, harness clamps and hoses from the engine.
(1)RH front, rear oxygen sensor connector (A).
(2)VIS connector (B).
(3)RH exhaust camshaft OCV connector (C).
(4)RH ignition coil connector (D).
(5)RH injector connector (E).
(6)VCM connector (F).
(7)Power steering switch connector (G).
(8)LH exhaust camshaft OCV connector (A).
(9)LH/RH intake camshaft OCV connector (B).
(10)Oil pressure switch connector (C).
(11)Knock sensor connector (D).
(12)VPS connector (E).
(13)Condenser connector (F).
(14)Ground (G).
(15)Disconnect LH front oxygen sensor connector (A).
(16)Disconnect alternator connector (A).
(17)LH ignition coil connectors (A).
(18)LH injector connectors (B).
(19)VIS connector (C).
(20)LH intake CMPS connector (D).
(21)MAP sensor connector (A).
(22)PCSV connector (B).
(23)RH intake CMPS connector (A)
(24)Knock sensor connector (B)
(25)OTS connector (C)
(26)ETC connector (D)
(27)RH exhaust CMPS connector (E)
8. Disconnect the PCSV hose (A), fuel hose (B) and throttle body coolant hoses (C).
9. Remove the throttle body mounting bolt (D).

Tightening torque:
18.6 - 23.5N.M (1.9 - 2.4kgf.M, 13.7 - 17.4lb-ft)
10. Disconnect the PCV hose (A) and remove the surge tank stay (B).

Tightening torque :
27.5 - 31.4N.M (2.8 - 3.2kgf.M, 20.3 - 23.1lb-ft)
11. Remove the surge tank (A).

Tightening torque:
9.8 - 11.8N.M (1.0 - 1.2kgf.M, 7.2 - 8.7lb-ft)
12. Remove the delivery pipe & injector assembly (A).
13. Remove the intake the manifold (A).
NOTE:
Cover the inlet of cylinder head with a clean cloth or vinyl cover to prevent foreign materials from entering the engine.

14. Installation is reverse order of removal.
Tighten the intake manifold bolts and nuts, in several passes as below.

Tightening torque
Step 1: 3.9 - 5.9N.M (0.4 - 0.6kgf.M, 2.9 - 4.3lb-ft)
Step 2:Nut- 18.62 - 23.52N.M (1.9 - 2.4kgf.M, 13.74 - 17.36lb-ft)
Bolt -26.5 - 31.4N.M (2.7 - 3.2kgf.M, 19.5 - 23.1lb-ft)
Step 3: Repeat 2nd step twice or more.

A - h : 1st step order
1 - 8 : 2nd step order
_______________________________________
I hope this helps. Let us know if you have other questions.

Take care,
Joe
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Friday, September 14th, 2018 AT 8:48 PM
Tiny
RIEBE123
  • MEMBER
Thanks.
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Saturday, September 15th, 2018 AT 12:31 PM
Tiny
DL AUTOSHOP
  • MEMBER
You are welcome!
Let us know how it goes. Thanks again for using 2CarPros.
Danny-
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Saturday, September 15th, 2018 AT 1:47 PM
Tiny
DAVE1310
  • MEMBER
  • 2011 KIA SORENTO
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
What are the recommended spark plugs for the vehicle listed above, and do I need to replace the intake gasket when I replace the plugs?
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Wednesday, October 14th, 2020 AT 11:52 AM (Merged)
Tiny
STEVE W.
  • EXPERT
OEM are NGK 9723 with a.044 gap. I would replace them while it is off. At 120,000 it has seen a lot of heat cycles. Please let us know if you need anything else to get the problem fixed.
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Wednesday, October 14th, 2020 AT 11:52 AM (Merged)
Tiny
GUILPUL
  • MEMBER
  • 2005 KIA SORENTO
  • 80,000 MILES
I bought this car and did not check it! So don't know when this problem start. It is burning the ignition coils, trying to identify the problem the garage has change about 8 times the ignition coils, a new battery has been fitted, 2 times they have change the complete set of spark plugs, the two position sensors, the drive bell and all its tensors have been replaced.
The high tension cables and the the cables from the Ecu to the coils have been replaces too. Now they are telling me that the ECU is also to be replaced! Please I need your help? Should I change the ECU as well? Mind you it is very expensive over here.
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Wednesday, October 14th, 2020 AT 11:52 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
When first starting a car (key in start position)a full 12 volts goes to the ignition system to help start a cold engine. When you release the key to the run position, the voltage drops so the system last longer. Have them check to see if there is a drop in voltage.
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Wednesday, October 14th, 2020 AT 11:52 AM (Merged)
Tiny
GUILPUL
  • MEMBER
Could a faulty ECU really make the ignition coils burn?
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Wednesday, October 14th, 2020 AT 11:52 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
If it doesn't lower the voltage.
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Wednesday, October 14th, 2020 AT 11:52 AM (Merged)
Tiny
MINDFXAS
  • MEMBER
Hello, I had the same problem, so yes, most cases coils are burning if ecu has a problem, coil has 3 contacts, red wire +12, middle wire-earth, 3rd wire is signal from ecu, if signal incorrect, that will burn the coil, remove the ecu from KIA sorento, it is under passanger footwell, determine which control(i mean 3rd wire to the coil)contact goes to ecu from coil that burns, then find control contacts from last two coils, check the resistance to earth(there is three coils in this KIA, probably you will find out, remove the ecu, take off the main board from there, now you know which 3 pins goes to coils as a control pins, check resistance to earth of each pin, you probably will see that resistance of that pin to earth, which goes to burning coil, will differ from others, if that so write me to xuiniavisokia@gmail. Com, I will give instructions what to do next, I repaired :) :) regards from LITHUANIA
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Wednesday, October 14th, 2020 AT 11:52 AM (Merged)
Tiny
ASHLEY1
  • MEMBER
  • 2004 KIA SORENTO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 55,000 MILES
An engine ight was on. I took it to a chain auto repair shop. I was charged 364. They replaced the #spark plug and the alternator belt. They said they had to remove the intake and test the plug coil/injector. Does this sound correct. It seems an excessive amount for a spark plug and belt?
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Wednesday, October 14th, 2020 AT 11:52 AM (Merged)
Tiny
DAVE H
  • EXPERT
This does seem excessive for what must have took around 2 hours labor at most, plus the cost of parts ??


https://www.2carpros.com/forum/automotive_pictures/266999_AAA2_441.png

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Wednesday, October 14th, 2020 AT 11:53 AM (Merged)
Tiny
VINCE44
  • MEMBER
  • 2003 KIA SORENTO
  • 3.5L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 165,000 MILES
I took my truck to Ace Auto Repair because it was a misfire in cylinder 2 so I had them change the spark plugs and wires they did that and about 3 hours later they call me and tell me my truck ran for 5 minutes and all a sudden my engine blew I never had engine problems always kept my oil changed and all other maintenance done he said it must have been internal that's the explanation he gives me and they still charged me full price my truck was running when I brought it their just had a small miss how does that happen.
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Wednesday, October 14th, 2020 AT 11:53 AM (Merged)
Tiny
WRENCHER1
  • EXPERT
This is a strange coincidence but we have o way to know what went wrong with your engine. It needs to be looked into further but I don't know if these are the people to do that. As far as the bill goes, you stated " I had them change the spark plugs and wires". Does that mean you made the decision that it needed plugs and wires or did they diagnose that as the problem. That would determine who should eat that money.
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Wednesday, October 14th, 2020 AT 11:53 AM (Merged)
Tiny
VINCE44
  • MEMBER
They suggested that I said ok he said it could be a bad plug or bad wire either way he said we can start their and he said if it continues it could be a fuel injector to answer your question I don't know if he put a scan on it or not I had it scanned the day before I told him what was told to me I specifically told them to run more diagnostics I don't know what happened all I know is it was running when I brought it to them now it's knocking like crazy and they didn't try resolve this or nothing even much the invoice doesn't have anything about how my engine blowed up just a bill for a tune-up.
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Wednesday, October 14th, 2020 AT 11:53 AM (Merged)
Tiny
VINCE44
  • MEMBER
It had to be trailered from their shop and I paid for that
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Wednesday, October 14th, 2020 AT 11:53 AM (Merged)
Tiny
WRENCHER1
  • EXPERT
I guess you need to get a second opinion and find out exactly what the problem is and whether they were the cause in any way which I doubt. If they didn't cause the problem, the most they are guilty of is misdiagnosis and even that doesn't seem to be the case after the way you explained the conversation. Just because they weren't aware of internal damage doesn't make them responsible for the problem unless they somehow caused it.
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Wednesday, October 14th, 2020 AT 11:53 AM (Merged)

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