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I have been reading a lot about the knocking and timing chain problems on the 4.6. I have also been trying to help a friend troubleshoot the knocking noise in his 98 F150 with the 4.6.
My question is do the newer 4.6 engines have the same problems and if so about how many miles can I expect out of one before it gives trouble. We have a 2010 Mustang with the 4.6 and it has 50,000+ miles and I am wondering how soon we should get rid of it. We like the car but do not need expensive engine repairs.
A 2010 4.6L has little in common with a '98. By '10 pretty much all the 3V problems have been acknowledged as far as I know and they have none of the 2V issues.
Regular and quality oil changes will help the 4.6 run well past 200,000 miles without major issues. A synthetic oil like Amsoil or Mobil 1 and Motorcraft filters is the best combination I've found so far.
The 4.6 is one of the most dependable small V8's ever made. They routinely go 200-500,000 miles in cop cars, taxis, trucks, and vans. Take a look at some used Town Car limos on E-Bay and you will see a lot of them with 200-300k miles on them; I had a buddy who ran a limo business and his mechanics loved the 4.6.
Don't worry about the engine; keep the recommended weight of oil in it and it will last a long time. My '02 E150 has 98k miles on it and the 4.6 in it uses less oil than when it was new. The body on the van will likely turn into a pile of rust before the engine gives me any problems.
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2003 F-350 Lariat CC 4x4 7.3L Auto 148K miles
