2000 Mercury Grand Marquis Q&A
2000 Mercury Grand Marquis Question: Intake manifold
the factory one is the one that cracks. the ends are made of plastic and either warp or crack. the new ones are made of metal on the ends so it does not happen again. Roy - mastertech6371
When you say original you mean the front of the intake manifold is plastic not steel correct? If it is plastic and I could afford the repair I would replace it. If you wait till it leaks you could be asking for more trouble than you want. If you have around 100,00 miles on it I would have the V/C gaskets done also. It is much easier to do the V/C gaskets in conjunction with the intake manifold. - backyard tech
Napa has replacement Intake Manifolds http://partimages.genpt.com/largeimages/234953.jpg $284 plus shipping www.napaonline.com - 427Chevy
If yours hasn't had any problems I wouldn't worry about fixing it as long as when/if it cracks it doesn't cause any additional problems...If there is risk of other problems occurring if the manifold cracks then yes I would replace it. - goodguysdiesel
the manifolds usually cracks after 100,000 miles you will see mad amount of antifeeze just don't run it hot and replace with aftermarket intake.i have had 3 intakes go on 3 different grand marquis.i have only really had problems with that and ball joints in 10 yrs iv'e owned grand marquis,Great car though overall!!!! - stealthmode036
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