Bad sounding engine knock on a 1993 7.3 idi with a factory turbo
#1
03-20-2018, 10:21 AM
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Bad sounding engine knock on a 1993 7.3 idi with a factory turbo
I have a 1993 7.3 idi with factory turbo. There is a loud knock type noise that starts after about 5 seconds of starting the truck up. I just put a new IP pump and reman injectors along with new glow plugs. I just got the truck running after 3 years of sitting. It leaks oil out of the oil drain pedestal where it enters the valley pan, i have a new grommet coming for that. There is a mixture of fuel and oil coming out the exhaust of the turbo also. There is no downpipe on the truck currently. Im not sure what the problem is. I checked the drivers sides push rods to make sure they were ok and all of them were pushing oil and sounded fine, i did not check the passenger sides yet though. Any help would be greatly appreciated!
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03-20-2018, 12:48 PM
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#4
03-20-2018, 01:37 PM
Cargo Master
First off, I'm glad you didn't Rick Roll me. 
Second, the audio is clear, there is something really wrong. However, without any light, it's hard to see what is going on. You might just have a loose accessory that is wobbling and making the noise, or it might be something serious on the internals of the engine, but without adequate illumination in the video, it's really just a guess.
Have you tried the "heater-hose-in-the-ear" trick to try and narrow the location?
Second, the audio is clear, there is something really wrong. However, without any light, it's hard to see what is going on. You might just have a loose accessory that is wobbling and making the noise, or it might be something serious on the internals of the engine, but without adequate illumination in the video, it's really just a guess.
Have you tried the "heater-hose-in-the-ear" trick to try and narrow the location?
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03-20-2018, 01:43 PM
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#6
03-20-2018, 01:53 PM
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This one is a little bit better https://youtu.be/8KHONPouQNA. I have not tried the heater hose idea yet. I was told that maybe the pump is off time but im not sure. As far as the turbo pushing oil out the exhaust port on the turbo, i may have to get a new one. I asked the local diesel mechanic and that was his thoughts.
Last edited by 1978FrankenFord; 03-20-2018 at 01:54 PM. Reason: Forgot link
#7
03-20-2018, 02:13 PM
Cargo Master
Try to use the heater hose. Get a section of heater hose about 3-4 ft long. Jam one end in your ear. Then move the other end around the engine bay (careful not to get near the belts and fan), and see if the sound gets louder. This will help you narrow the search.
You probably just need a reseal on the turbo instead of a new turbo. But fix that quick. if that were to leak into the intake part, you would get a run-away diesel and it'll blow your engine.
But first things, let's see if we can figure out that knocking. Did you get a chance to check the pushrods on the other side?
You probably just need a reseal on the turbo instead of a new turbo. But fix that quick. if that were to leak into the intake part, you would get a run-away diesel and it'll blow your engine.
But first things, let's see if we can figure out that knocking. Did you get a chance to check the pushrods on the other side?
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#8
03-20-2018, 02:39 PM
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I wont be able to do anything more with it tonight. I will have time tomorrow and thursday in the morning but that is about it.
what reseal kit should i get for the turbo?
I did not check the push rods on the passenger side because i was trying to post pone it so that way i didnt have to take the turbo off but i seems im going to have to do it anyway. Would the knock be a IP timing issue? It is also pushing fuel along with oil out of the exhaust port on the turbo. And in the 2nd video there was a squeaking noise im not sure what that is either.
what reseal kit should i get for the turbo?
I did not check the push rods on the passenger side because i was trying to post pone it so that way i didnt have to take the turbo off but i seems im going to have to do it anyway. Would the knock be a IP timing issue? It is also pushing fuel along with oil out of the exhaust port on the turbo. And in the 2nd video there was a squeaking noise im not sure what that is either.
#9
03-20-2018, 06:06 PM
#10
03-20-2018, 07:27 PM
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#11
03-20-2018, 09:06 PM
Squeak noise sounds kind of like an accessory. Remove the belts and run it briefly.
I also hear what sounds more like a top end noise than a bottom end noise. What is your oil pressure at idle and at 2000 RPM? Pull the valve covers and check that there's no slop in any of the rockers. Does it sound louder on either side? Metal in oil?
I also hear what sounds more like a top end noise than a bottom end noise. What is your oil pressure at idle and at 2000 RPM? Pull the valve covers and check that there's no slop in any of the rockers. Does it sound louder on either side? Metal in oil?
#12
03-20-2018, 09:11 PM
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I did pull the valve cover on the driver side and 2 of the rockers had a little bit of a wiggle and the the other ones were rock solid. All the pushrods were pumping oil normally. I havent checked the other side yet i will tomorrow. Ive been doing some research and some people say it was just a bad injector or timing was off. I just replaced injectors that dont even have 1 mile on them m, could 1 be bad? It does to me also sound like a top end knock because i have gotten underneath the motor while it was running and it wasnt loud under there.
#13
03-20-2018, 09:13 PM
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#14
03-20-2018, 09:17 PM
From your video you have a fancy new truck. '87 and up came with a pressure switch, I believe set at 7 psi. If you have 7 psi the gauge is above zero, if you have less it reads zero. This is helpful but you really should have a proper oil pressure gauge. If your turbo is hemorrhaging oil this could be bleeding off a lot of pressure and causing other issues.
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03-20-2018, 09:23 PM
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Ya im not sure on the oil pressure on the cluster i guess i havent really looked at the truck. I just got it and my daily driver is a 1978 f250 so its a little different. What other issues could the turbo consuming oil causing? Also the turbo spits out fuel with the oil out of the exhaust port of the turbo. If the oil drain of the turbo is clogged would that cause the trubo to push oil out the exhaust port?