I have yet to tear into a motor I have received for a future project but I was just curious on what you guys think.....

99 Crown vic Police Interceptor NPI 4.6 with 17*,*** miles....

I was told when the motor was pulled that it had a slight tick toward the bottom end on start up but went away pretty quick. The motor ran strong when it was pulled.....

I am assuming one of the timing chain tensioners isn't pumping up very quickly and causing the noise....

Either way its gonna get a rebuild anyway but the motor is set to be installed into my 83 hatch for awhile until I get a 32v dropped in.

What do you guys think about it?

 

A lot of 4.6's tend to have piston slap when cold. Is that what they were hearing maybe? My car has that sound for a few seconds after a cold startup.

 

Thats possible.....is piston slap normal after some high milage?

 

My car ticks/slaps like hell always has since I got it 50,000 miles ago. You need to keep in mind that you essentially have a truck power-train + drive-train that was engineered in the 90s that just got dropped into a coupe to make it a GT. There wasnt a whole lot of refinement in the engineering of these systems, they are naturally noisy engines.