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#4111344 - 06/01/21 11:10 AM 2000 Grand Marquis OEM Intake Manifold Replacement
jjones1193 Offline
Stranger

Registered: 03/17/21
Posts: 4
Loc: Tennessee
Hello All,

I recently bought a 2000 MGM. The intake manifold needs replacing. I wanted to use OEM parts but I am having a hard time finding the manifold.

The information I found stated that I need PN F8AZ-9424-CB but it is discontinued. I have the 4G alternator.

Tasca parts lists this PN 1W7Z-9424-AB would fit, but this is the only site I found that says this.

Does anyone have any experience with a replacement on the 2000?

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#4111350 - 06/01/21 12:23 PM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: jjones1193]
RF_Overlord Offline

Poobah

Registered: 12/14/02
Posts: 7614
Loc: MA
You have an NPI motor, so you're limited to the Dorman et.al. manifolds, or you can install a Ford Racing PI manifold, but it's a little more involved. Unless you're planning significant mods, the Dorman will be fine. I have one on my 2000.
_________________________
'03 Mercury Marauder (The Blackbird)
Trilogy Motorsports supercharged #61
Too many mods to list / Driveway Queen

'04 Grand Marquis LS Limited Edition (Spruce Green)
Daily Driver (Thanks, Adam!)

'00 Grand Marquis GS (Silver)
Rotted frame and broken transmission crossmember
Being resurrected...slowly.

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#4111354 - 06/01/21 12:36 PM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: jjones1193]
Davidzq Offline
Climber

Registered: 01/19/15
Posts: 512
Loc: Seattle, WA
As RF said, you have an NPI motor. Ford no longer makes the NPI intakes.
Either buy a Dorman intake (which is NPI), or upgrade to the PI, which is pretty easy to do.

1R3Z-9424-AAA is a kit which includes OEM PI intake, OEM gaskets, and the newer style alternator bracket you will need. This is the Mustang kit, but exact same parts, the Vic part number (1W7Z) is out of stock.

3W7Z-18663-BA is the newer style heater return pipe, which shifts it out of the way to make room for the larger PI intake. These pipes rust out, so it's recommended to replace them anyways.

You will need to apply a glob of RTV to the corner of the four coolant passages, as they are slightly different shape.
There are several tutorials on this on YouTube, mostly on the Mustang, but it's identical.
_________________________
David Hensley
Member of Northwest Panthers Car Club

2008 P71, Norsea Blue SAP
-Message Center cluster retrofit
-Towncar Signature L heated power seats
-Long overhead console
-Compustar remote start/security

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#4111364 - 06/01/21 01:17 PM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: jjones1193]
AlleyG Offline
Climber

Registered: 04/28/14
Posts: 575
Loc: Raleigh, NC
I second to go with the Ford parts. The Dorman won't last nearly as long, 5 years if you're lucky, but that's how long parts from Advance Auto last in my experience. I won't go into my usual Advance rant, lol!

I removed a Dorman from my T-Bird, and the integral gaskets looked like they were made from cake icing. I had two leaks, both of them well hidden.

Al
_________________________
2004 CVPI - 85k miles
1997 T-Bird LX - 85k miles
1994 Supra Turbo - 107k miles
Previous Fords:
1988 T-Bird, 1995 T-Bird, 1996 Cougar

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#4111382 - 06/01/21 03:29 PM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: jjones1193]
jjones1193 Offline
Stranger

Registered: 03/17/21
Posts: 4
Loc: Tennessee
I'm going to go with the OEM PI Intake.

Thanks everyone


Edited by jjones1193 (06/01/21 03:29 PM)

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#4111614 - 06/03/21 08:42 PM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: jjones1193]
ironmarinebill64 Offline
n00b

Registered: 01/30/21
Posts: 32
Loc: New York, USA
I'd suggest if you're gonna install a used PI to closely inspect where the aluminum crossover and the underside manifold plastic meet: that's where the plastic corrodes and the small gasket groove deteriorates and breaks off. I've gotten a few miles more out of used ones by taking the crossover off, cleaning up the little rubber gaskets that go in the groove and then putting everything back together with a liberal amount of Super Blue RTV.

And like Davidzq said up above, you have to do the RTV glob on the front bank 1 and rear bank 2 water passages. Be patient and let it cure at least several hours (I've done this job three times now and let it sit overnight each time) before you add coolant.
_________________________
2005 Lincoln Town Car Signature Limited
5.4 liter throttle body; PI oil cooler, intake tube & air box; Mark VIII aluminum driveshaft; Trac-Lok limited slip; Richmond Gear axle shafts; J-Mod with Sonnax valves; Limo rear control arms and a great sounding stereo that won't ever automatically remember my Bluetooth settings

1999 Mercury Grand Marquis (gave that to youngest son, and he's now a converted true believer)

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#4111818 - 06/06/21 01:28 PM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: ironmarinebill64]
jjones1193 Offline
Stranger

Registered: 03/17/21
Posts: 4
Loc: Tennessee
So just an update...
I received the OEM PI Intake kit yesterday, as well as the new heater return pipe.

I saw some information where some people advised changing the heater core hoses as well as the PI coolant nipple.

I wanted to change all that is necessary while doing this job since I don't currently have to drive the vehicle everyday.

I plan on starting the fix next weekend, just wanted to ask for more opinions.

Best regards,

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#4111826 - 06/06/21 06:30 PM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: jjones1193]
ironmarinebill64 Offline
n00b

Registered: 01/30/21
Posts: 32
Loc: New York, USA
I'd agree with others' advice to replace the heater hoses. General rule I'm guessing we all try and follow is "I've gotten this far...might as well while I'm here."

You do have to change the steel heater line under the manifold. the original non-PI one will not work as the PI intake's runners are deeper and will hit the tube. If you have a knock/sound insulator for the PI intake, you'll see that it has a relief molded into the left side to fit the PI heater tube.

If you're replacing the heater nipple behind the water pump, use care as I've heard stories of folks smashing it too hard and breaking the block. If not, I'd suggest the correct o-rings and a liberal amount of sealant.

My practice, now that I've done this job more than a couple times, is to remove the wiper/cowl assembly. It can be done without removing it but for me it just makes everything easier and more accessible, especially the left side crash bracket and the bolt holding it in the back of the block.

I've found that the 20 to 40 minutes added taking that wiper cowl off and putting it back on will save at least an hour to an hour and a half when putting everything together. Plus it makes it so much easier to get to the 4 and 8 plugs if your gonna change them while your at it.

Again good luck
_________________________
2005 Lincoln Town Car Signature Limited
5.4 liter throttle body; PI oil cooler, intake tube & air box; Mark VIII aluminum driveshaft; Trac-Lok limited slip; Richmond Gear axle shafts; J-Mod with Sonnax valves; Limo rear control arms and a great sounding stereo that won't ever automatically remember my Bluetooth settings

1999 Mercury Grand Marquis (gave that to youngest son, and he's now a converted true believer)

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#4111954 - 06/08/21 01:21 PM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: jjones1193]
Danger2manifold Offline
Member

Registered: 02/23/19
Posts: 236
Loc: Little Poland, CT
Hey, this may be a dumb question, but I've always been curious: couldn't you just use heater hose that was the right diameter to replace the NPI heater tube? It always seemed like it would be an easier option that was just as effective as popping in the PI heater tube. I could be wrong, but if it would make this job easier I'm sure all of us NPI folks would appreciate it!
_________________________
Current Panther:
1999 Crown Victoria LX - 69,420 miles (nice) as of 1/27/21, Toreador red, 18x8 Anthracite Torq Thrust M's, AEM Dryflow panel filter, custom 2.25" dual exhaust with H-pipe, Magnaflow XL mufflers, Jones 22" long 4" slash cut tips, Kenwood KMM-BT225U head unit, PPI A600/4 4-channel amplifier, PPI i650.1 monoblock amplifier, Pioneer 6x8 2-way speakers, two 12" JBL subs in sealed enclosures, 2/2019 to present

Past Rides:
2003 Buick Regal GS Joseph Abboud edition - as close to a Grand National as I'll probably get, traded in 2/2019
1996 Lincoln Town Car Signature - 1st car ever bought, dubbed "The Emancipator" by friends, rear ended and totalled in 5/2016
2002 Buick Rendezvous CXL - passed to me by the folks, handed down to younger brother in 2/2015

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#4112000 - 06/08/21 08:36 PM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: jjones1193]
ironmarinebill64 Offline
n00b

Registered: 01/30/21
Posts: 32
Loc: New York, USA
Not a dumb question. I've done it before in a pinch. But basically comes down to the desired longevity of the repair work. You jamb a hose on there with some gear fittings and eventually, with repeated heat cycles, things work loose and leak. And it happens where you can't see what's going on. Also, to do that right, you'd want to make sure you flair the cut ends of the tube so that the repair hose would seal properly.

If knowledge serves me correctly, the original, pre-98 set-up used a custom fitted rubber hose with steel ends. But those often would corrode or degrade from rubbing on the block and cause leaks in the valley. That's why Ford went to a single steel line.
_________________________
2005 Lincoln Town Car Signature Limited
5.4 liter throttle body; PI oil cooler, intake tube & air box; Mark VIII aluminum driveshaft; Trac-Lok limited slip; Richmond Gear axle shafts; J-Mod with Sonnax valves; Limo rear control arms and a great sounding stereo that won't ever automatically remember my Bluetooth settings

1999 Mercury Grand Marquis (gave that to youngest son, and he's now a converted true believer)

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#4112648 - 06/16/21 02:33 PM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: jjones1193]
Texican Offline
Banned
Stranger

Registered: 06/10/21
Posts: 1
Loc: Hondo
Noobie here, some great info here at CVn. This a topic I am going to get familiar with, but it's a 2001 PI engine.

Is there room under the intake to run a top grade soft hose or is the steel line the only way I wonder? I can see there's not a lot of room under there.

I saw somewhere where an effective fix for a failing steel line was using rubber lines and a 90* elbow at that nipple under the alternator and bringing that line out in front of the intake to curve back towards the heater core?
_________________________
Yet another CrystalPistol duplicate account

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#4112652 - 06/16/21 03:27 PM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: jjones1193]
Davidzq Offline
Climber

Registered: 01/19/15
Posts: 512
Loc: Seattle, WA
There isn't much room....an elbow is basically the only way.

But you're better off just sticking with the factory metal line. They last about 200k miles. Would be hard to get that out of a rubber line.
_________________________
David Hensley
Member of Northwest Panthers Car Club

2008 P71, Norsea Blue SAP
-Message Center cluster retrofit
-Towncar Signature L heated power seats
-Long overhead console
-Compustar remote start/security

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#4112674 - 06/16/21 05:48 PM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: Texican]
a_d_a_m Offline

3 Orange Whips
Metroplectic

Registered: 10/25/05
Posts: 27794
Loc: Cleveland, OH
Originally Posted By Texican
Is there room under the intake to run a top grade soft hose or is the steel line the only way I wonder? I can see there's not a lot of room under there.
You should try reading "THE Book", Neanderthal.

Originally Posted By Texican
Noobie here
No you aren't.
_________________________

'91 LTD Country Squire (POTM Mar. '19) | '03 Marauder (POTM Nov. '10, Jul. '20) | 2010 P7B (POTM Feb. '21)
formerly: '02 MGM, '04 MGM, '04 MGM v2.0, '04 MM, '07 P71 (POTM Feb. '18), '04 CVLX (POTM Jun. '19 and the best car ever), '03 SAP P71

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#4112738 - 06/17/21 10:53 AM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: a_d_a_m]
bluejay_32 Offline
Poobah

Registered: 08/28/16
Posts: 9614
Loc: wny
NassauPistol strikes again.
_________________________
2008 Grand Marquis - bought 7/29/16 - 60,210 mi
Inaugural CVNw POTM - December 2018 slug
CVN POTM - February 2019 joy



Originally Posted By Rob Gordon
NOW GET YOUR PATCHOULI STINK - OUTTA MY STORE! MOVE IT, LARD-ASS!

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#4113078 - 06/20/21 11:24 AM Re: 2000 Grand Marquis OEM Intake Manifold Replacement [Re: jjones1193]
KYF350 Offline
Climber

Registered: 09/10/07
Posts: 956
The intake manifold for the MGM in my signature has also been discontinued. My parts man at the counter of the dealership where I buy my parts found a kit on Amazon.com. It was from a Ford Dealer in Texas. If I am not mistaken, there were some on here that said I could use the metal part and bolt it onto the plastic part and it will work. As far as the lines under the manifold, I bought the OEM line and replaced the nipple and the water pump at the same time with OEM parts. On my car the rubber line runs under the manifold; on a 2000 I think it is a metal line with seals. I replaced that manifold a second time and just cut the metal banding and slid a new hose on; I don't think you can do that on your car as it has a complete metal line under the manifold. Good luck with what ever you decide.
_________________________
2005 Ford Excursion Eddie Bauer, 4X4, True Blue/Arizona Beige, 6.0 liter PSD, all bells and whistles, 30mm Ford rear anti-sway bar.
2005 Ford F-350 Superduty, 4X4, 6.0 liter PSD, Red, SC, SRW, Lariat, B&W Turnover hitch, all bells and whistles.
2004 Ford Crown Victoria LX Sport, Dark shadow grey, SOLD.
1996 Mercury Grand Marquis LS, Mocha, HPP, 173A package, traction assist. Mom's car.

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