Having problems with your 2004 Lincoln Navigator ?
2004 Navigator 5.4l dohc passenger side lifter tap.
\015 Vehicle sat for one week..started it and it started to tap on pass side. Changed oil..tap went away, came back a couple days later. Marvel mystery oil..tap stopped, came back next day...on and off for a couple days then got loud. Changed passenger side lifters, timing chain tensioner,and guides. Found plastic from guide in oil pan, cleaned oil pump pickup screen. Checked oil pressure with manual gauge...75psi on start up. Is there something that would restrict oil from getting to passenger side head? I have changed everything I thought would cause the problem...I am not familiar with this engine to know about oil restrictors or any problems with this engine.\015
Repair Help & Product Troubleshooting for 2004 Lincoln Navigator
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