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Thanks guys, for the attempts to help me diagnose the engine problem with my Navigator. It turned out that the driver side intake cam chain was broken.
We did a compression test and found very low compression in cyl.s #5 and 7 so we stopped everything and removed the cam cover and found the broken chain. Knowing that that would cause valve damage we started looking for a donor vehicle or a used low(er) mileage engine at a reasonable price. I finally found one about 200 miles away and went to get it, came home and started the R&R process and finally got it all together. The engine I bought came from LKQ in Fredricksburg Va., nice people and good prices and guarantee. We got the engine in and all hooked up then took it for a ride. I must say, I am impressed! The 5.4 DOHC is a very smooth and powerful engine, very strong acceleration and so smooth to drive it feels much like an overgrown Mark VIII.
Anyway guys, I just wanted to let you know that the Navigator engine saga has been concluded. I'm happy and lovin' my Navigator. Can't wait to take a nice trip through the Blue Ridge, on the Parkway, of course. It has 4WD but I have no plans to go off road with it.
We did a compression test and found very low compression in cyl.s #5 and 7 so we stopped everything and removed the cam cover and found the broken chain. Knowing that that would cause valve damage we started looking for a donor vehicle or a used low(er) mileage engine at a reasonable price. I finally found one about 200 miles away and went to get it, came home and started the R&R process and finally got it all together. The engine I bought came from LKQ in Fredricksburg Va., nice people and good prices and guarantee. We got the engine in and all hooked up then took it for a ride. I must say, I am impressed! The 5.4 DOHC is a very smooth and powerful engine, very strong acceleration and so smooth to drive it feels much like an overgrown Mark VIII.
Anyway guys, I just wanted to let you know that the Navigator engine saga has been concluded. I'm happy and lovin' my Navigator. Can't wait to take a nice trip through the Blue Ridge, on the Parkway, of course. It has 4WD but I have no plans to go off road with it.
