#1958493 - 01/17/10 09:16 AM
Antifreeze on the spark plugs
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Member
Registered: 08/20/08
Posts: 105
Loc: New Jersey
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I had a misfire on cylinder 5 and 6 so I got new spark plugs and coil on plugs. When I pulled out the coil on plug for cylinder #5 I looked down the little hole where the spark plug sits and I saw theres all this antifreeze in there. I couldn't even see the spark plug.
Does anyone have any idea where this leak is coming from? How is the antifreeze getting in there? I unplugged the battery and changed out the spark plugs and coil on plugs. But when I drove a couple miles the check engine light came back on again because of all the fluid that gets in the spark plug hole.
I also noticed that my car has a plastic intake. I think I read on here that those plastic intakes are known to give problems should I replace it with a metal intake?
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1999 Crown Victoria P71 
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#1958537 - 01/17/10 10:41 AM
Re: Antifreeze on the spark plugs
[Re: TwistedMetalP71]
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Poobah
Registered: 12/12/01
Posts: 8303
Loc: Rochester NY
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i dont know how but you have been here two years and missed all the intake failure posts... your intake is shot
the antifreeze will screw up that new coil also... stop driving and you need to replace the intake. Just do a search.. tons of information
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2006 LX with HPPBlue, Light Camel Interior,Magnaflow Exhaust,PI Zip Tube
Underdrives from ADTR.net
Pioneer AVIC X930BT Nav system, JL xD400/4amp, JL Speakers, Audiovox backup camera
2000 HPP RESURECTION RIP 8/17/2012 died in Dayton OH
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#1958538 - 01/17/10 10:41 AM
Re: Antifreeze on the spark plugs
[Re: TwistedMetalP71]
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Poobah
Registered: 11/30/01
Posts: 5618
Loc: Tucson Az
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If it is #5 and #6, then it can be the plastic crossover is cracked around the thermostat, the classic plastic cracked across the front failure, leaking from the thermostat housing/neck.
Yes, the all plastic intake has more than a few common failures, and many of them are fixed with the revised intake with the aluminum crossover. My 97 Cougar suffered two ruptured plastic coolant crossovers, and my 2000 GM the rear heater nipple was weeping.
There are aftermarket replacements, but they have quite a few negatives against them, I instead bought a used take off one for my 2000 Grand Marquis for 50 bucks, and I put a PI intake on my 97 Cougar.
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00 Grand Marquis LS Premium - 97 Cougar 4.6 Sport - 89 Cougar LS - 63 Falcon 302 - 82 F-150 - 1974 Honda cb400 
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#1958732 - 01/17/10 03:35 PM
Re: Antifreeze on the spark plugs
[Re: Bangster]
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Member
Registered: 01/07/10
Posts: 193
Loc: South Florida
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Sounds like what was happening to me. The intake manifold was leaking and there were stress cracks on the thermostat housing.
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2000 Crown Victoria Police Interceptor -
Future Mods: MagnaFlow Direct-Fit Catalytic Converters
Exhaust/Mufflers (Undecided)
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#1965295 - 01/26/10 01:21 PM
Re: Antifreeze on the spark plugs
[Re: Chase3203]
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Member
Registered: 12/13/09
Posts: 184
Loc: Eastern Minnesota, US
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cracked manifold I would guess, had the same problem. If you buy a new one make sure it has a metal housing and crossover.
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 2000 P71 150K (Former Wyoming Highway Patrol car with glasspack exhaust)
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#1965296 - 01/26/10 01:22 PM
Re: Antifreeze on the spark plugs
[Re: JJackP71]
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Over the Hill
Registered: 09/16/05
Posts: 3428
Loc: Erie, PA
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VERY common problem. You need to replace the manifold. I recommend the OEM, but if you must by the dorman, they also work well.
Edited by Fordiesel69 (01/26/10 01:23 PM)
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 ******Need your heater core replaced? Click Here******-99' Crown Vic Police Interceptor (SAP), 3.55 Trac-Loc(DK), Cloth Interior, Black Honeycomb Grill, Black PI Trunk Bezel, Silverstars, 155K-00' Crown Vic Police Interceptor (SAP), 3.55 (R2), Cloth Interior, Black PI Trunk Bezel, 03+ Full Wheel Covers, Silverstars, 109K-96' Lincoln Town Car - Executive Series, 3.08's, White w/ blue leather interior, 155K-99' Lincoln Town Car - Signature Series, 3.08's, Silver Frost Metallic, 94K
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#1965301 - 01/26/10 01:29 PM
Re: Antifreeze on the spark plugs
[Re: Fordiesel69]
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Over the Hill
Registered: 02/26/06
Posts: 4799
Loc: Long Island, NY
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Yup you got the classic manifold crack. Good luck bro. Your path is clear, your duty awaits.... 
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#1965308 - 01/26/10 01:37 PM
Re: Antifreeze on the spark plugs
[Re: Ask_The_Shack]
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Poobah
Registered: 03/22/03
Posts: 9363
Loc: NW side Chicago
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Good luck, ive done this at least 5 times. even twice when i was 15.
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 Jason G. Replaced 1st intake manifold at 15. haha '03 Marquis: 67K,15.31 @ 91.19, MZT 93 octane tune, P&P Aviator T/B, duals with rear cats missing, 3.27 Trac loc 31 spline rear, sway bars, tints, badgeless grille..blahblah various exterior mods *NEW* Steeda pulleys and Towncar rims '08 F-450
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#1965318 - 01/26/10 01:50 PM
Re: Antifreeze on the spark plugs
[Re: 99_03PantherS]
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Over the Hill
Registered: 09/16/05
Posts: 3428
Loc: Erie, PA
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And on a CV/GM it is very easy. Not so on a town car.
_________________________
******Need your heater core replaced? Click Here******-99' Crown Vic Police Interceptor (SAP), 3.55 Trac-Loc(DK), Cloth Interior, Black Honeycomb Grill, Black PI Trunk Bezel, Silverstars, 155K-00' Crown Vic Police Interceptor (SAP), 3.55 (R2), Cloth Interior, Black PI Trunk Bezel, 03+ Full Wheel Covers, Silverstars, 109K-96' Lincoln Town Car - Executive Series, 3.08's, White w/ blue leather interior, 155K-99' Lincoln Town Car - Signature Series, 3.08's, Silver Frost Metallic, 94K
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Registered: 12/18/06
Posts: 434
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