Need help with timing chain issue

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05-23-2018, 07:59 PM

Anthony Sellers

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Need help with timing chain issue

I. Have an04 f150xl with a modular 4.6 l I tore it down and found one chain broken and the guides in pieces but no other damage but the timing was off I saw in a post where someone said if your chains aren't on cam/crank don't spin the crank why not

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05-23-2018, 09:08 PM

Roadie

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The pistons could hit the valves.

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05-25-2018, 11:01 AM

Anthony Sellers

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Need advice

My Lhasa timing chain had broken and my guides were gone so I did turn crank a couple of turns , but I put the crank back to tdc on my compression stroke , then set my cam gears and chain then , then rotated by hand about 6times bacteria to tdc

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05-25-2018, 07:41 PM

Roadie

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When the chain broke there is a possibility that the pistons hit the valves and were damaged. After you get it back together, I'd suggest a compression test or probably the best idea is to pull the head and verify whether there was damage. I'm not an expert on that engine but I'm fairly sure it's an interference engine.

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