A rod knock is is just that, a knocking or a metallic rattling sound. It's often loudest or most noticeable around 30 mph or so. Sometimes you can reduce the sound or even make it go away by disconnecting the spark plug to that cylinder. On older engines with distributors you simply pulled the plug wire to each cylinder until you found the one that reduced the sound. On a modern engine like your Coyote I would simply remove the coil covers if they're still in place and then disconnect the coil pack to the suspect cylinder. Obviously you may have to try more than one cylinder. Don't disconnect more than one at a time. This isn't foolproof, but it can often detect a loose of failed bearing. Again as I suggested earlier a failed or failing bearing will almost always show up in the oil filter media. If you haven't looked here yet, it would pay you to do so.
Ugh. Possible bad rod bearing...
- Thread starter tjcase85
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Just like mentioned above your next step would be to disconnect each coil pack and go from there. It's obviously not a exhaust leak or idler. If you do disconnect a coil pack and it goes away I would then pull your oil filter and cut it open.
I think I read a thread here where someone had the same noise and he did in fact have a failed rod bearing. He ended up just replacing the bearing and everything has been fine since. Keep us updated on what you find out.
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I think I read a thread here where someone had the same noise and he did in fact have a failed rod bearing. He ended up just replacing the bearing and everything has been fine since. Keep us updated on what you find out.
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- Apr 13, 2017
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I had same noise took it to the dealer 3 times they said it was injectors or that's just the way they are or they couldbt hear it 36,000 cylinder 1 locked up now building a motor
Sorry to hear your having some issues, if you end up needing to replace the motor we can supply you an awesome shortblock or do a full build for you! We actually have an engine set up for a blower and for an NA setup in stock ready to ship as soon as tomorrow! Give us a call for any questions or concerns my name is cody and i can be reached at 313-561-5500 extension 104
My number 8 cylinder went out, Prestige Ford told me that they could not warranty it because I had tampered with the software. They gave me a sheet of paper which was there correspondence with Ford and it showed my vehicle information, it spoke of their testing procedures including cylinder bore scope, etc, and then explained that the computer seems to have been modified.
At that point I was on my own. But it's cool because now I can build a coyote engine with my eyes closed. That was my first modular build.
I spun a rod in my 13gt, sounded like rocks rolling around. Drain oil and you will see metallic particles in it if its spun. It ruined everything the block was trash the heads and cams were junk. Being everything is aluminum it scored the cam journals, put deep grooves in every one of them.
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Major bummer for sure. But now I have a MPR built shortblock. Ky wallet was in shock for a while haha!
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Yeah, I took mine off the road for a bit, but it's in the shop now with big changes
It took me about a year and a half before I was back on the road. I did everything but build the shortblock and money held me up a bit. If you hotrod things like this are bound to happen.
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You need to get on it then! JkMine was sitting since 2010.
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I'm on it!
they can see driving cycles. return it to stock and drive it . put gear lube in it lol.
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