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  #16  
Old 02-08-2018, 01:05 AM
99Ranger376 99Ranger376 is offline
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Default Re: 4.0 SOHC Timing Chain Still Rattles

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Originally Posted by beau-tech View Post
After looking at a couple of videos I see what you are describing. My bro must have meant the rear timing chain pieces. I will replace the tensioners when the weather warms up. Thank you for the help


Youíre welcome the one in the back can be access through the passenger side wheel well with a big extension


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  #17  
Old 02-08-2018, 09:15 PM
flyboy12 flyboy12 is offline
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Default Re: 4.0 SOHC Timing Chain Still Rattles

I have one last thought regarding me replacing the tensioners and the start-up rattle remaining- I didnít ďprimeĒ the tensioners when I installed them. I didnít pump them full of oil before putting them in. Could that still be the issue?


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  #18  
Old 02-11-2018, 12:23 AM
99Ranger376 99Ranger376 is offline
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Default Re: 4.0 SOHC Timing Chain Still Rattles

No they would prime quickly


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  #19  
Old 02-11-2018, 09:37 AM
flyboy12 flyboy12 is offline
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Default Re: 4.0 SOHC Timing Chain Still Rattles

Unbelievably, that was the issue. The rear tensioner never self-primed. I pulled it out, pumped it full of oil, put it back inó no rattle. Crazy, but Iím praying I didnít cause too much damage


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  #20  
Old 02-12-2018, 12:47 AM
99Ranger376 99Ranger376 is offline
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Default 4.0 SOHC Timing Chain Still Rattles

Wow thatís crazy, I would think it would prime itself. I hope that takes care of your issue. However, Iím wondering if that tensioner is defective, because it should have filled with oil on its own. Good luck with it.


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'98 Ranger XLT 2WD (sold)
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  #21  
Old 02-13-2018, 10:34 AM
flyboy12 flyboy12 is offline
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Default Re: 4.0 SOHC Timing Chain Still Rattles

After ten starts since, there has been absolutely no rattle. Fired my truck up today at 20 degrees, zero rattle. It is leaking oil a tiny bit, so I need to get my torque wrench and get it down to 45 or so ft-lbs and then go from there. I really think this took care of my issues.

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Originally Posted by 99Ranger376 View Post
Wow thatís crazy, I would think it would prime itself. I hope that takes care of your issue. However, Iím wondering if that tensioner is defective, because it should have filled with oil on its own. Good luck with it.


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  #22  
Old 02-13-2018, 12:07 PM
99Ranger376 99Ranger376 is offline
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Default Re: 4.0 SOHC Timing Chain Still Rattles

You may have to go a little tighter to get a seal because Iím guessing that you had to re-use the washer from the old tensioner since the new one doesnít come with it.


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  #23  
Old 03-01-2018, 09:35 PM
flyboy12 flyboy12 is offline
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Default Re: 4.0 SOHC Timing Chain Still Rattles

Well, update. Rattle slowly but surely came back from the rear timing system. Pulled out that "new" tensioner and it was EMPTY. It had no prime- no oil pressure, just spring pressure. I tried pumping it full of oil, and I could squeeze it all out at once. So I primed the old one up and put it back in because it actually holds a prime. There's still a rattle, but it's honestly not as bad as it was with the "new" tensioner. Just ordered another genuine one from a different supplier on Amazon.... Are the cassettes and the timing system just is messed up, but only allow rattling at start up? Any ideas or thoughts are very, very appreciated.
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  #24  
Old 03-02-2018, 03:52 PM
99Ranger376 99Ranger376 is offline
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Default Re: 4.0 SOHC Timing Chain Still Rattles

The spring gets worn out when the tensioner is not holding oil, and the spring is what holds tension on the cassette on start up until the oil pressure comes up. Hopefully a genuine Ford Tensioner fixes the problem.


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