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yes…So theoretically speaking, if I disconnect the cold advance from the pump itself, should it sound different?
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yes…So theoretically speaking, if I disconnect the cold advance from the pump itself, should it sound different?
hello. I’m replying to the original post because I’m having a similar problem. After running for months without any problems the engine started to make a knocking noise and spitting out a lot smoke. The video below shows the knocking. This engine was replaced 20 months ago and I only drove from 4500 miles. Any suggestions what to check? From the original post some people mentioned injectors, lifter, change oil, etc.Hello fine individuals, I started hearing some noises today that nobody likes to just start hearing out of the blue.
Basically, I've had this M1043A2 6.5L for almost a month, been getting it fixed up while waiting for the sf97 to come in. Today, I installed a new oil pressure and voltage gauge, as the previous ones had water intrusion. I take it out for a drive, and I'm about 20 minutes in with the engine at full operating temperature. As I'm driving at around 35-40MPH, I start hearing a very audible clacking/smacking sound, very different than anything I've heard from this machine yet.
I pull over and shut it off and then proceed to look around the engine bay for anything loose, the only thing I found was that the crankshaft pulley has a little bit of play in the rubber. I start it again and rev it slowly a few times. The clacking follows the engine RPM, and is 100% not part of the normal diesel clacking sounds you typically encounter.
So far.. I've read that it can be a few things:
1: Bad injector
2: Cracked piston / head
3: Loose pulleys / bad bearings
4: Other fun things
Trying to narrow down what it is, I took a video and the sound is very evident around the 30-40 second mark:
If anyone's heard this before or has any ideas on what I can check, would be appreciated. One thing of note is that my bottom-most injector line on the injection pump is pretty rusted, so there may be a possibility of air getting in the line? But it doesn't seem to be leaking either. I'll probably start by pulling the injector lines one-by-one and seeing if the noise persists.
What color is the smoke? White? Black? Take a video of it.hello. I’m replying to the original post because I’m having a similar problem. After running for months without any problems the engine started to make a knocking noise and spitting out a lot smoke. The video below shows the knocking. This engine was replaced 20 months ago and I only drove from 4500 miles. Any suggestions what to check? From the original post some people mentioned injectors, lifter, change oil, etc.
Appreciate any suggestions.
the smoke is grayish. Not black at all. The video below shows. I have not changed the oil since the issue started. I will change it tomorrow. Last time I used Rotela T6 15w40. Today I’ve added sea foam engine treatment. It should help cleaning the injectors.What color is the smoke? White? Black? Take a video of it.
Go to the front of the engine bay and look at the pulley system. Look at each pulley closely while it’s running, are any of them wobbling? Is the tensioner slapping? The pulleys would likely be unrelated to the smoke however.
If it’s white smoke, you may be burning coolant, either blown head gasket or water is getting in somehow
Black smoke at idle wouldn’t really make sense
The sound is very similar but the smoke in my case is gray/white.
thank you. I have no experience. How difficult is to “crack the injectors lines”?Just listened to the 2nd video and I believe it's a stuck open injector. Explains the sound and the smoke. As suggested crack the injector lines one at a time to isolate. If it is stuck open don't drive it as the poor cylinder is getting washed.
You’ll want a set of injection line wrenches, but nothing to it. Wrench goes in/on, loosen, listen, watch.thank you. I have no experience. How difficult is to “crack the injectors lines”?
Not likely to help, if you added it to the oil guaranteed not to help.the smoke is grayish. Not black at all. The video below shows. I have not changed the oil since the issue started. I will change it tomorrow. Last time I used Rotela T6 15w40. Today I’ve added sea foam engine treatment. It should help cleaning the injectors.
Hmmwv smoke video
View attachment 907578
It is best to have an injector wrench like this one.thank you. I have no experience. How difficult is to “crack the injectors lines”?
did you ever find the fix for this issue? I’m having the same exact problem. Thankshello. I’m replying to the original post because I’m having a similar problem. After running for months without any problems the engine started to make a knocking noise and spitting out a lot smoke. The video below shows the knocking. This engine was replaced 20 months ago and I only drove from 4500 miles. Any suggestions what to check? From the original post some people mentioned injectors, lifter, change oil, etc.
Appreciate any suggestions.
Welcome to the SS forums, a knock can be a bad injector, break each line loose one at a time and then re-tighten until you find the injector causing the knockdid you ever find the fix for this issue? I’m having the same exact problem. Thanks