maverickfhs
Thread starter
Originally Posted By: UncleDave
Originally Posted By: maverickfhs
Originally Posted By: UncleDave
Chain is almost always lower cost.
Startup rattle is very easy to hear and it occurs during the first cold start of a day when there is chain and tensioner wear and the hydraulically actuated tensioners are bled down and need to come up to pressure to remove slack.
Some better tensioners (like 3.5 ecoboost ones) have a ratchet type mechanism that locks once a tooth is used up that makes chain slap a non issue - until youve used up all the teeth.
Its a very pronounced sound and once you've heard it you'll know it forever and be able to pick it out in any vehicle.
Thanks UD, very clear and helpful explanation. Can you please point me to a youtube video where I can actually hear it? Just for my own learning and knowledge sake.
Thanks again.
https://www.youtube.com/watch?v=SR7tyh5FJu8
Here an ecoboost exhibiting the problem sound - pre fix.
UD
Thanks UD, that's a very very loud and obvious rattling, like something is grinding!
Does it mean tensioner is toast? Chain has skipped or anything else is broken?
Originally Posted By: maverickfhs
Originally Posted By: UncleDave
Chain is almost always lower cost.
Startup rattle is very easy to hear and it occurs during the first cold start of a day when there is chain and tensioner wear and the hydraulically actuated tensioners are bled down and need to come up to pressure to remove slack.
Some better tensioners (like 3.5 ecoboost ones) have a ratchet type mechanism that locks once a tooth is used up that makes chain slap a non issue - until youve used up all the teeth.
Its a very pronounced sound and once you've heard it you'll know it forever and be able to pick it out in any vehicle.
Thanks UD, very clear and helpful explanation. Can you please point me to a youtube video where I can actually hear it? Just for my own learning and knowledge sake.
Thanks again.
https://www.youtube.com/watch?v=SR7tyh5FJu8
Here an ecoboost exhibiting the problem sound - pre fix.
UD
Thanks UD, that's a very very loud and obvious rattling, like something is grinding!
Does it mean tensioner is toast? Chain has skipped or anything else is broken?