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Q: Had the head done after the seats dropped into the motor. on 2002 Ford Escort

The shop went through the head. replaced all the seats. A couple of new valves were replaced. Now that the new head is on the valves are lose. They are torqued to specs. The upper end makes rattle . Can not get it to stop. What is wrong.
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On a slightly older Escort 1.9L engine the valve seats usually #4 cylinder used to fall out, strange problem. I see the engine in your car should be a 2.oL. Check compression is even and do a cylinder leakage test to see valves are sealing well. After that look to see oil is pumping around the head and that debris is not stuck in a passageway in the head restricting oil flow that would allow as Roy said the lifters to properly pump up. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate
Yes it is 2 liter engine. We took apart the lifters and cleaned each one. the #4 cylinder is 75 lbs. and the rest are 150. I have not checked the oil passages in the head. thanks for the in fo. Don
lifters may not be pumping up or they may be bad.

did a shop assemble the motor or did you do it??

a mechanic installed the head on the car. a machine shop replaced all 4 seats and rebuilt the head,
did you return to the mechanic who did the work?? is there a warranty and what were his findings for this issue??

the person who put the head on was a friend. He is a mechanic. But he is at his wits end. He has never saw this problem before. The shop that did the head is a great shop. The valves or rocker arms seem to be lose. The rocker arm never made this sound before. It was only after the head was replaced. The head was gone through and through.
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