Lincoln Repair Questions? Ask a Mechanic for Answers ASAP
I have a 99 Lincoln Navigator 5.4L 32V DOHC. I had to replace the left cylinder head due to secondary timing chain breaking. I had purchased a used one from ebay, and found out after install valves was no good. I had then saved up some money to purchase a remanufactured head, and after assembly, there seems to be a knocking when the vehicle starts and idle. But when turning over no sounds.
I have the OTC tools needed for the timing, all timing marks are aligned according to All data.
I had taken the left valve cover off, and see no signs of anything out of the ordinary. When I conducted a compression check it had showed 120 - 150 psi. which is in range.
The question is what is the knocking noise, and suggestions to correct this problem.