5.9 magnum knock on startup
#1
05-24-2018, 05:11 PM
Join Date: Apr 2018
Location: Carson city nv
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5.9 magnum knock on startup
Hey guys any magnum techs out there?
trying to post a short video of my motor when i start it up. Not sure if its posting. But i have a loud knock on startup for a couple of seconds then goes away and im not sure exactly what it is. It does blow bluish smoke and does burn oil. Could it be valves, plenum, or rods? Any help would be appreciated
trying to post a short video of my motor when i start it up. Not sure if its posting. But i have a loud knock on startup for a couple of seconds then goes away and im not sure exactly what it is. It does blow bluish smoke and does burn oil. Could it be valves, plenum, or rods? Any help would be appreciated
#2
05-24-2018, 06:19 PM
Hey guys any magnum techs out there?
trying to post a short video of my motor when i start it up. Not sure if its posting. But i have a loud knock on startup for a couple of seconds then goes away and im not sure exactly what it is. It does blow bluish smoke and does burn oil. Could it be valves, plenum, or rods? Any help would be appreciated
trying to post a short video of my motor when i start it up. Not sure if its posting. But i have a loud knock on startup for a couple of seconds then goes away and im not sure exactly what it is. It does blow bluish smoke and does burn oil. Could it be valves, plenum, or rods? Any help would be appreciated
#3
05-24-2018, 06:27 PM
Join Date: Apr 2018
Location: Carson city nv
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#4
06-23-2018, 01:44 PM
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I've owned the v10 for about a year.
Initially I had a symptom where at a cold start (24+ hours cold) the oil pressure dash gauge would take about 5 seconds (counting: 1 Mississippi, 2 Miss..etc) to show oil pressure, and the last 2 seconds before pressure came up I would hear a knock. Then it would be gone.
This last oil change I switched to valvoline high mileage synthetic and stp extended life filter (It was a sale at autozone) Now oil pressure comes up at 3 seconds, and no knock.
Previous oil change was 10w/30 oriellys house brand and wix filter. Those are the only 2 changes on the truck (I don't drive much I only change the oil twice a year, fall and spring, before and after towing season).
I wouldn't call this scientific evidence, but it was very consistent before, and has been gone the last 3 weeks since oil change)
Incidentally on a warm start pressure gauge is up within 2 Mississippi count.
ray
99 2500 v10 4x4
Initially I had a symptom where at a cold start (24+ hours cold) the oil pressure dash gauge would take about 5 seconds (counting: 1 Mississippi, 2 Miss..etc) to show oil pressure, and the last 2 seconds before pressure came up I would hear a knock. Then it would be gone.
This last oil change I switched to valvoline high mileage synthetic and stp extended life filter (It was a sale at autozone) Now oil pressure comes up at 3 seconds, and no knock.
Previous oil change was 10w/30 oriellys house brand and wix filter. Those are the only 2 changes on the truck (I don't drive much I only change the oil twice a year, fall and spring, before and after towing season).
I wouldn't call this scientific evidence, but it was very consistent before, and has been gone the last 3 weeks since oil change)
Incidentally on a warm start pressure gauge is up within 2 Mississippi count.
ray
99 2500 v10 4x4
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06-23-2018, 01:55 PM
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06-24-2018, 05:36 PM
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#8
06-26-2018, 07:58 AM
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Well - I didn't want to take away from the OP thread - but they haven't returned.
On my v10 - I'm pretty sure it's a knock, and not lifter noise...My lifters do cackle at times, my perception is that it comes and goes...It's less noticeable at speed, from inside cab. The lifter noise has a pretty good tempo.
The knock is a slower tempo - think johnny cash - and it sounds like a knock, literally like someone is under the hood knocking on something with a pipe. Usually only knocks about 2-3 times before oil pressure is up and sound goes away.
I'll be curious to see if the 5 seconds from cold start oil pressure coming up returns (and the knock), either with time/miles after an oil change, or possibly with cold weather in the fall.
For the moment the oil pressure comes up in 3 seconds, and no knock...and I'll take it!
On my v10 - I'm pretty sure it's a knock, and not lifter noise...My lifters do cackle at times, my perception is that it comes and goes...It's less noticeable at speed, from inside cab. The lifter noise has a pretty good tempo.
The knock is a slower tempo - think johnny cash - and it sounds like a knock, literally like someone is under the hood knocking on something with a pipe. Usually only knocks about 2-3 times before oil pressure is up and sound goes away.
I'll be curious to see if the 5 seconds from cold start oil pressure coming up returns (and the knock), either with time/miles after an oil change, or possibly with cold weather in the fall.
For the moment the oil pressure comes up in 3 seconds, and no knock...and I'll take it!