plastic intake manifold. Lincoln company should pay for it. had to be replaced with metal. plus new park plugs there should have been call back to replace intake manifold. shame on them.

intake manifold cracked - part is plastic

Obviously a design flaw for which there were some recalls, but not for my VIN number of course. How can that be??

The intelligent manufacture used a plastic goose neck which is part of the intake manifold.

Update from Dec 14, 2015: I had to teplace the intake manifold at a cost of $1,000.00

The thermostat housing cracked vertically 3/8" wide top to bottom.In 45 years of working on and and driving i have never had a intake crack open for no reason.Being plastic which usually gets brittle with age it don't surprise me .They can keep their autos with plastic engine parts.Ford has a problems with these manifolds and the engines coils cases cracking.I've talked to other people/mechanics that has seen or repaired these problems.May be last Ford i will own!

Apparently, this issue with the 'cracked manifold' is a common problem and should have been covered by Ford/Lincoln Company. This repair was very costly and I'm still upset!

I was shocked to find out, via the internet, that this was an issue with so many people.

The shop that fixed my car said that he had worked on several 1999 Lincoln Town Car with the same problem.....If there are enough complaints filed.....they might just do a recall of this and we get our money back

I noticed the fuel mileage had decreased dramatically and there was an occasional miss in the engine. Took it into a reliable repair shop. Plastic intake manifold was cracked.

Replaced the manifold with a metal one and replaced the spark plugs. Fuel mileage came back to normal immediately.