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Interesting mod motor spark plug failure #4508564
09/05/17 10:26 PM
09/05/17 10:26 PM
Joined: Aug 2006
Posts: 9,798
Central Washington
Colt45ws Offline OP
Colt45ws  Offline OP
Joined: Aug 2006
Posts: 9,798
Central Washington
So I blew out another spark plug, but it didnt fully eject. The combustion pressure blew through the threads on a small section then proceeded to Oxy-gasoline torch the spark plug and cylinder head.




Its cut the head so bad it might actually be non-repairable. I dont know how long it was leaking for since I had my radio cranked. Finally I went WOT around a truck and o boy was it loud.
Im glad I already got the ball rolling on getting another engine in it rather than do the timing chains on this engine, since it might need a cylinder head now.


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: Interesting mod motor spark plug failure [Re: Colt45ws] #4508587
09/05/17 10:58 PM
09/05/17 10:58 PM
Joined: Aug 2009
Posts: 1,991
PA
Gasbuggy Offline
Gasbuggy  Offline
Joined: Aug 2009
Posts: 1,991
PA
On the crown vic? Never saw anything like that before on a N/A Ford Mod.


CTS-V+Recaros 5w30 Magnatec
Volvo P1800 5w30 Euro L
Land Rover Series 10w40 VWB
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95 Accord - 386k. Mobil 2 RIP
Re: Interesting mod motor spark plug failure [Re: Colt45ws] #4508595
09/05/17 11:07 PM
09/05/17 11:07 PM
Joined: Dec 2006
Posts: 4,219
Port Orange, Florida
Panzerman Offline
Panzerman  Offline
Joined: Dec 2006
Posts: 4,219
Port Orange, Florida
JB Weld to the rescue!!



2006 Dodge Ram 2500 Hemi 4x4
2016 Dodge Challenger Scat Pack
Re: Interesting mod motor spark plug failure [Re: Colt45ws] #4508598
09/05/17 11:11 PM
09/05/17 11:11 PM
Joined: Nov 2008
Posts: 9,032
Phoenix
dishdude Offline
dishdude  Offline
Joined: Nov 2008
Posts: 9,032
Phoenix
I'm surprised the compression gases - even blowing the spark up would be hot enough to melt the plug.


2018 Challenger SRT
Re: Interesting mod motor spark plug failure [Re: Gasbuggy] #4508604
09/05/17 11:28 PM
09/05/17 11:28 PM
Joined: Aug 2006
Posts: 9,798
Central Washington
Colt45ws Offline OP
Colt45ws  Offline OP
Joined: Aug 2006
Posts: 9,798
Central Washington
Originally Posted By: Gasbuggy
On the crown vic? Never saw anything like that before on a N/A Ford Mod.

Yap


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: Interesting mod motor spark plug failure [Re: Colt45ws] #4508661
09/06/17 02:33 AM
09/06/17 02:33 AM
Joined: Aug 2017
Posts: 209
Cincinnati, USA
Dave9 Offline
Dave9  Offline
Joined: Aug 2017
Posts: 209
Cincinnati, USA
This is abnormal, I suspect a combination of not torquing them enough then cleaning your engine perpetually with water and letting the threads rust out.

Re: Interesting mod motor spark plug failure [Re: Colt45ws] #4508679
09/06/17 04:04 AM
09/06/17 04:04 AM
Joined: Jan 2016
Posts: 315
Cheshire, England
barryh Offline
barryh  Offline
Joined: Jan 2016
Posts: 315
Cheshire, England
Combustion gases not hot enough to do that damage ?

I don't fully understand the mechanism at work but it's more erosion than melting. if you have a gasket failure on a steam pipe and leave it to leak long enough without repair it will cut a groove in a sold steel pipe flange that looks a lot like that spark plug damage.


Barry

1979 BMW R45 (Triple QX 5W40)
2009 Mercedes C180K (Shell Helix Ultra 5W40)
Re: Interesting mod motor spark plug failure [Re: Colt45ws] #4508700
09/06/17 05:54 AM
09/06/17 05:54 AM
Joined: Apr 2008
Posts: 37,093
Ontario, Canada
OVERKILL Online content
OVERKILL  Online Content
Joined: Apr 2008
Posts: 37,093
Ontario, Canada
That's impressive if anything. Do you have a borescope to take a peek at the underside? I agree with you that it may be "unrepairable" as in the head would need to be removed and welded, then worked, then an insert put in.


2018 RAM 1500 Big Horn EcoDiesel
2016 Grand Cherokee SRT
Re: Interesting mod motor spark plug failure [Re: Colt45ws] #4508722
09/06/17 06:43 AM
09/06/17 06:43 AM
Joined: Sep 2004
Posts: 7,514
Marshfield , MA
andyd Offline
andyd  Offline
Joined: Sep 2004
Posts: 7,514
Marshfield , MA
That is a deep reach plug. How does it "blow out" ? There is nearly an inch of thread on the plug. Could somebody s'plain the mode of failure to me? Once again FOMOCO metallurgy fails to impress. Colt45ws isn't at fault here. TIA


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Interesting mod motor spark plug failure [Re: Colt45ws] #4508742
09/06/17 07:09 AM
09/06/17 07:09 AM
Joined: Oct 2005
Posts: 4,337
Kansas
Kruse Offline
Kruse  Offline
Joined: Oct 2005
Posts: 4,337
Kansas
I'd bet it was giving indications of a problem for quite awhile, but like you said, if your stereo was cranked, I guess you didn't hear it.
Which cylinder was this one? Like you probably guess, I bet this one will require a new cylinder head.

Re: Interesting mod motor spark plug failure [Re: Kruse] #4508788
09/06/17 08:28 AM
09/06/17 08:28 AM
Joined: Dec 2015
Posts: 261
Ontario Canada
Canadastang Offline
Canadastang  Offline
Joined: Dec 2015
Posts: 261
Ontario Canada
Is this the generation of 2V's that only had something crazy like 4 threads?

I know in later years they added more threads to prevent this from happening.

Fordtechmakuloco advocates overtorquing the plugs to about 20 ft. lbs, instead of the called for 10ish ft lbs. I did that on my Town Car 6 months ago and no issues.

Did you use a torque wrench on the last plug change?

Re: Interesting mod motor spark plug failure [Re: Colt45ws] #4508803
09/06/17 08:49 AM
09/06/17 08:49 AM
Joined: May 2009
Posts: 12,180
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline
Joined: May 2009
Posts: 12,180
N.H, U.S.A.
Al heads, peanut plugs with no gasket. Nice design.

I do like this engine though for many REAL advancements in mfg that would make Grumpy ole Henry happy.

I Specifically find the assembled camshaft(s) with sintered lobes to be real out of box thinking.


2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter
Re: Interesting mod motor spark plug failure [Re: Colt45ws] #4508805
09/06/17 08:50 AM
09/06/17 08:50 AM
Joined: Jan 2013
Posts: 1,834
Texas
WyrTwister Offline
WyrTwister  Offline
Joined: Jan 2013
Posts: 1,834
Texas
You plan to replace the entire engine , not just the head ? What , salvage yard engine ?

Best luck to you , :-)


Wyr
God bless
Re: Interesting mod motor spark plug failure [Re: WyrTwister] #4508808
09/06/17 08:56 AM
09/06/17 08:56 AM
Joined: Dec 2015
Posts: 261
Ontario Canada
Canadastang Offline
Canadastang  Offline
Joined: Dec 2015
Posts: 261
Ontario Canada
Originally Posted By: WyrTwister
You plan to replace the entire engine , not just the head ? What , salvage yard engine ?

Best luck to you , :-)


Swap in a 5.4 2V from a truck or van and if funds allow, throw on some trick flow heads, port the exhaust manifolds and make some real power!

Re: Interesting mod motor spark plug failure [Re: OVERKILL] #4508842
09/06/17 09:18 AM
09/06/17 09:18 AM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Originally Posted By: OVERKILL
That's impressive if anything.


I have never seen anything like this in my life.

I mean, I have seen spark plug failures (center blows out of steel shell) and spark plug holes fail in numerous ways, but this is COMPLETELY new.

Yes, time for that engine swap we were talking about!


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
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