dbranger94
Well-Known Member
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- #1
So, several months ago I replaced the OPG and crank timing sprocket on my coyote. Everything went well and the car ran great. A few days later I start to hear a chirping noise coming from the drivers side front of the engine. I couldn't find the noise for the life of me. I knew it wasn't a belt or tensioner issue because I could take the belt off and the noise was still present. So, I tore into the cam followers and lash adjusters and also didn't find anything. I spent several months talking to Ford and other people in the industry. Everyone was really helpful but ultimately nothing worked. Here is a crappy video I took of the noise. It's hard to watch, so you can just close your eyes if you need to...
Just by chance I found a TSB from 2011 that described my problem exactly. TSB 11-9-15
https://latemodel.cachefly.net/downloads/tsb05-14/tsb11-09-15.pdf
I had nothing else to lose so I took the front cover back off and inspected the drivers side cam tensioner and found this.
The plunger was riding in the bore at a slight angle and you can see where it was rubbing on one side in the back and the other side in the front. I replaced the tensioner and now the noise is gone. Apparently, if these things aren't perfectly tangent to the chain guide they side load the plunger.
Just by chance I found a TSB from 2011 that described my problem exactly. TSB 11-9-15
https://latemodel.cachefly.net/downloads/tsb05-14/tsb11-09-15.pdf
I had nothing else to lose so I took the front cover back off and inspected the drivers side cam tensioner and found this.
The plunger was riding in the bore at a slight angle and you can see where it was rubbing on one side in the back and the other side in the front. I replaced the tensioner and now the noise is gone. Apparently, if these things aren't perfectly tangent to the chain guide they side load the plunger.
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