Engine noise
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Elder User
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Engine noise
Can someone tell me what this noise might be? It sounds like a compression leak,it sounds just like and exh leak. But I wouldn't think it wouldn't be as you can see in the video it doesn't blow the cap off.YouTube - Engine
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Elder User
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Yes the cap is upside down,I'm just keeping my finger there so it doesn't slide off. I would think if it is a compression leak it would blow the cap off.
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Elder User
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Okay guys I forgot to mention with the cap on it sounds normal. I just want to make sure everything is good before pulling the engine. Would a bent push rod cause that? But with a bent push rod the valve would close sooner or not open all the way. It has to be something on the compression stroke. Could compression pass the injectors?
Laughing Gas
Joined: Feb 2004
Posts: 822
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From: Leander Texas
Have you done anything under the valve covers lately? Can you hear that noise through the intake?
You could try unplugging the UVCH connections and see if the noise goes away to determine a side.
If that works, yank the valve cover and unplug each injector individually to determine a cylinder.
Inspect rocker arms and pushrods for damage.
Your probably going to have to yank valve cover regardless, and your problem might be right there staring you in the face.
You could try unplugging the UVCH connections and see if the noise goes away to determine a side.
If that works, yank the valve cover and unplug each injector individually to determine a cylinder.
Inspect rocker arms and pushrods for damage.
Your probably going to have to yank valve cover regardless, and your problem might be right there staring you in the face.
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Have you done anything under the valve covers lately? N0 I have not done anything under the valve cover yet.Can you hear that noise through the intake?No noise through the intake.I have the air filter off too.
You could try unplugging the UVCH connections and see if the noise goes away to determine a side.Is that with the engine running or unplug first then start.
If that works, yank the valve cover and unplug each injector individually to determine a cylinder.Will it run with vc off?
Inspect rocker arms and pushrods for damage.
Your probably going to have to yank valve cover regardless, and your problem might be right there staring you in the face.
You could try unplugging the UVCH connections and see if the noise goes away to determine a side.Is that with the engine running or unplug first then start.
If that works, yank the valve cover and unplug each injector individually to determine a cylinder.Will it run with vc off?
Inspect rocker arms and pushrods for damage.
Your probably going to have to yank valve cover regardless, and your problem might be right there staring you in the face.
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Elder User
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Well I think I found my problem. I pulled the right VC today and found a glow plug wire hanging with out and end. I loked at the glow plug and the top had blownoff. I pulled the GP and found a little hole in it. That could have blown the top off I would guess. But what cold have cause that hole or some what pitted hole. The top of the glow plug are know where to be found. It looks like it has been that way for a while because the wire break dont look fresh.
Is that a bad thing,that it was blowing compression through the glow plug? I'm still going to do a compression as soon my adapter gets in.
Is that a bad thing,that it was blowing compression through the glow plug? I'm still going to do a compression as soon my adapter gets in.
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Fleet Owner
Joined: Jun 2004
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From: Rio Rico, AZ.
I don't think you need to do a compression test unless you just want to.
It won't hurt the engine at all venting the pressure like that.
What I would do if it was my truck is to retorque all the rocker pedastals (20 foot pounds) and injector retainers (120 inch pounds).
Replace the wiring harnesses, make sure that the valve cover gasket connectors are not burned and if so, replace the valve cover gaskets too.
Put it all back together, change the oil and drive it.
It won't hurt the engine at all venting the pressure like that.
What I would do if it was my truck is to retorque all the rocker pedastals (20 foot pounds) and injector retainers (120 inch pounds).
Replace the wiring harnesses, make sure that the valve cover gasket connectors are not burned and if so, replace the valve cover gaskets too.
Put it all back together, change the oil and drive it.
Senior User
Joined: Mar 2003
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Well I think I found my problem. I pulled the right VC today and found a glow plug wire hanging with out and end. I loked at the glow plug and the top had blownoff. I pulled the GP and found a little hole in it. That could have blown the top off I would guess. But what cold have cause that hole or some what pitted hole. The top of the glow plug are know where to be found. It looks like it has been that way for a while because the wire break dont look fresh.
Is that a bad thing,that it was blowing compression through the glow plug? I'm still going to do a compression as soon my adapter gets in.
Is that a bad thing,that it was blowing compression through the glow plug? I'm still going to do a compression as soon my adapter gets in.
I personally don't think it has hurt anything. The compression had a place to go so you are good to go. Replace the glow plug and wire end, button it up and enjoy.
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Elder User
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I don't think you need to do a compression test unless you just want to.
It won't hurt the engine at all venting the pressure like that.
What I would do if it was my truck is to retorque all the rocker pedastals (20 foot pounds) and injector retainers (120 inch pounds).
Replace the wiring harnesses, make sure that the valve cover gasket connectors are not burned and if so, replace the valve cover gaskets too.
Put it all back together, change the oil and drive it.
It won't hurt the engine at all venting the pressure like that.
What I would do if it was my truck is to retorque all the rocker pedastals (20 foot pounds) and injector retainers (120 inch pounds).
Replace the wiring harnesses, make sure that the valve cover gasket connectors are not burned and if so, replace the valve cover gaskets too.
Put it all back together, change the oil and drive it.
Thanks
Lead Driver
Joined: Sep 2005
Posts: 9,399
Likes: 188
From: Norco,CA
Good find. I'm with Dan on this one. The plug could of been cracked when installed and just broke loose after use. Who knowns. If it was runing alright not many of us would of noticed it if the noise was only when the oil cap was removed. good luck, Chet
