Short rattle on cold start

[Redbull14]

I recently began noticing a quick “rattle” on cold starts with my SHO. It last about a second and goes away after that. I’m guessing the cam phasers are about ready to need replaced and that the noise is present until oil pressurizes the phasers? Car has 115k with original timing components. Any thoughts? Assuming I commit to a full timing replacement (chains, tensioners, guides, WP) are the phasers basically bolt on/off and plug in or do they require additional cam work and a full retiming? Thanks for any help/info/thoughts.

 

[SM105K]

Yep sounds like you are on the right path of diagnosis.

 

[GotGrip?]

I recently began noticing a quick “rattle” on cold starts with my SHO. It last about a second and goes away after that. I’m guessing the cam phasers are about ready to need replaced and that the noise is present until oil pressurizes the phasers? Car has 115k with original timing components. Any thoughts? Assuming I commit to a full timing replacement (chains, tensioners, guides, WP) are the phasers basically bolt on/off and plug in or do they require additional cam work and a full retiming? Thanks for any help/info/thoughts.

Having timing done right now for this exact reason although mine lasts far longer than 1 sec, chain was a little loosey goosey in there.

 

[luigisho]

Having timing done right now for this exact reason although mine lasts far longer than 1 sec, chain was a little loosey goosey in there.

Does this setup have 1 or 2 tensioners?

 

[SeanDev]

Your going down the right path. Your symptoms are exactly the same issue I went through with my F-150 3.5 Ecoboost when its timing chain stretched. Your doing it right, if your going in there might as well replace everything. One job and done. And if you have a dealership do it, yes its expensive but you get a 3 year 36,000 mile warranty on their work on the pump and chain. My 2013 Taurus water pump went at 150,000 miles, had everything replaced while they where in there.

 

[Bluezone]

I'd have to agree with everyone else. With my car I thought I had a rattle there and it turned out to be my flex pipes. They weren't leaking but something was loose inside them.