timing chain
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New User
Joined: Dec 2004
Posts: 4
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timing chain
First off, just want to comment on what a great site this is. I've learned quite a bit about my truck. My 99 Navigator has 142k well maintained miles, and runs like a dream. By far the best truck I've ever owned. My question is, from what I understand these (5.4) are interference engines. Has anyone had timing chain or tensioner problems? Should I think about having it replaced? I mean, if this thing breaks, it will no doubt wipe out all the valves, and at my mileage, may as well say "goodbye motor". I know that back in the day timing chains were good for 200k, but i'm not looking forward to the price of a new engine if this one breaks. And if anyone has had theirs replaced, what kind of money did it run? Mega bucks? Thanks guys!
Posting Guru
Joined: Sep 2002
Posts: 2,297
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You pose an interesting question: Incur the cost of installing new chains and tensioners on an engine with 142k, buying some time until the engine is too tired to continue, or wait until the engine craps out and replace with a rebuilt? I'm assuming that this is a 2V 5.4, not the later 4V. My greatest fear would be to incur the cost of the chain service, then watch a spark plug launch from the cylinder head.
