98WhiteZ71
OBS Enthusiast
- Joined
- Nov 4, 2015
- Messages
- 68
- Reaction score
- 3
98 5.7 vortec with 220K
So about a week ago truck started to make a noise. sounds like an air pump with the hood open. seems to be coming from the passenger side and towards the front of the engine. truck is still driveable with the noise but the noise is getting louder and louder each day it seems.
No check engine light
no loss in power
no loss in oil pressure
Replaced the passenger side exhaust manifold gasket and didnt fix the issue. While i had the manifold off i took a wire brush to it and could not find any cracks in the manifold
Also removed and reinstalled all the spark plugs on the passenger side head and checked the wires. Still didnt fix the issue.
Took the belt off the engine and started the engine up also and the sound was still there. So a pulley isnt causing the issue.
Also took a piece of house like a stethoscope to try and locate where the sound was coming from and couldnt find it. Tried the valve cover and nothing from there. tried the intake manifold and nothing from there.
http://vid1358.photobucket.com/albums/q776/2000_BLACK_SS/truyck 2_zpsz5z1ro12.mp4
http://vid1358.photobucket.com/albums/q776/2000_BLACK_SS/truck_zpsb6ofsjaj.mp4
at this point i am thinking that is it is something internal and if that is the case i will probably have to replace the engine or just part the truck out for what i can get from it. Just bought the truck last fall and put 10k on it and never had a problem till now. And looking around for used L31 engines they all seem to be in the 1500 range from what i could find unless i was looking in the wrong places. And seeing as i only paid 2K for the truck dont want to put another 1.5K into it.
Any thoughts on what the sound could be or what i could check?
So about a week ago truck started to make a noise. sounds like an air pump with the hood open. seems to be coming from the passenger side and towards the front of the engine. truck is still driveable with the noise but the noise is getting louder and louder each day it seems.
No check engine light
no loss in power
no loss in oil pressure
Replaced the passenger side exhaust manifold gasket and didnt fix the issue. While i had the manifold off i took a wire brush to it and could not find any cracks in the manifold
Also removed and reinstalled all the spark plugs on the passenger side head and checked the wires. Still didnt fix the issue.
Took the belt off the engine and started the engine up also and the sound was still there. So a pulley isnt causing the issue.
Also took a piece of house like a stethoscope to try and locate where the sound was coming from and couldnt find it. Tried the valve cover and nothing from there. tried the intake manifold and nothing from there.
http://vid1358.photobucket.com/albums/q776/2000_BLACK_SS/truyck 2_zpsz5z1ro12.mp4
http://vid1358.photobucket.com/albums/q776/2000_BLACK_SS/truck_zpsb6ofsjaj.mp4
at this point i am thinking that is it is something internal and if that is the case i will probably have to replace the engine or just part the truck out for what i can get from it. Just bought the truck last fall and put 10k on it and never had a problem till now. And looking around for used L31 engines they all seem to be in the 1500 range from what i could find unless i was looking in the wrong places. And seeing as i only paid 2K for the truck dont want to put another 1.5K into it.
Any thoughts on what the sound could be or what i could check?