Posted by JD Seller on March 10, 2013 at 09:07:12 from (208.126.196.144):
In Reply to: 2002 Ford 4.0 engine posted by rrlund on March 10, 2013 at 08:17:34:
A very good friend just went through this with a 2003 Mercury Mountaineer. It had 82K on it. He only had owned it a little over a year. He bought it from a local Ford dealer. The chain guides filled the oil pan with filings. The front chain is right above the oil pump. So it picks the metal up right away. Then it fills the oil filter up and pushes the metal past the bypass valve in the filter straight into the rest of the motor. His motor was shot.
He drove it home from church and parked in on Sat. night. He went to go to town Monday and it knocked when he started the motor. He had it towed to the Ford dealer he bought it off of (Victory Ford at Dyersville, Iowa) Yes I will name them as they where useless and down right lied to him. They told him they had not heard of any problems with the 4.0 motor. He had me look on the Internet. I found thousands of posts about the timing chain issue. So they just flat out lied to him!!!!!
They wanted him to put in a long block at the cost of $5500. He only gave $9500 for the vehicle. We went and brought it to my shop. I dropped the oil pan and pulled some bearing caps off. The crank was shot. Every journal was damaged. I got about two lbs. of filings out of the oil pan.
We went to a different Ford dealer and they told us right away that Ford had an issue with the 4.0 motor. Ford claims to have fixed it in 2000 or 2001. So they rarely cover any repairs out of warranty on any motor newer than that. There is a recall on certain years that quits at 75K. This dealer contacted Ford with the info on the Mercury Mountaineer. Ford would not do anything on that vehicle.
The timing chain system is a poor design. The make the chains go around a figure eight type of guide. This guide is metal. So they have metal running on metal. Plus the chain has a rough outside so it will cut the guide even with oil on it. Why they just did not have the chain go straight between the crank and cam shaft idler shaft is a mystery to me. It is like they wanted more wrap around on the sprockets. The guides should have been rollers or ploy not metal. Plus there is a chain in the rear of the motor that requires the entire motor or transmission to be removed to replace it.
It is a real problem that has not been fixed on the newer models. You will find a lot of Ford vehicles traded off right at 75K. Many trade after they get the recall letter. Others do it on advice from their mechanics. So BUYER BEWARE!!! I would not by any Ford 4.0 OHV engine regardless of the age or miles. The older 4.0 without overhead cams held up well.
It seems that Ford has trouble designing motors. The 5.4 had head/spark plug issues. The 4.0 with over head cams has this timing chain guide issue. The 6.0 diesel is a total junk. The 6.4 is not much better.
I was really thinking about buying a Ford after the bail out of GM and Chrysler. I am terrified of owning a Ford because of their poor engine history. I know many will claim they get hundreds of thousands of mile without any troubles but there are thousands of people that do not have that luck.
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