1hz Knocking Sound (1 Viewer)

Joined
May 26, 2020
Messages
18
Location
Iran
Hello everyone.
It's about a year I hear something like knocking sound from the 5th cylinder of my 1hz.
At the beginning, it wasn't that much but it has been increased smoothly up to now.
Valve clearance has been done and there is nothing wrong with the injection pump but when I take the gasoil nozzles off each cylinders, I hear nothing strange than before except the 5th cylinder.
In addition, I should say that there is no blue smoke comes out from the exhaust.also when I cold start the engine, the sound is louder for almost 15 seconds.
What should be the problem?
Might be from the piston pin?
 
Joined
Jul 21, 2014
Messages
168
Location
Anchorage, Alaska
Hello everyone.
It's about a year I hear something like knocking sound from the 5th cylinder of my 1hz.
At the beginning, it wasn't that much but it has been increased smoothly up to now.
Valve clearance has been done and there is nothing wrong with the injection pump but when I take the gasoil nozzles off each cylinders, I hear nothing strange than before except the 5th cylinder.
In addition, I should say that there is no blue smoke comes out from the exhaust.also when I cold start the engine, the sound is louder for almost 15 seconds.
What should be the problem?
Might be from the piston pin?
Check the connecting rod bearings. The noise maybe coming from connecting rod bearing on cylinder 5. You don't have take the engine out to check the connecting rod on 1HZ. Check this video Connecting rod replacement.
 
Joined
Apr 20, 2002
Messages
1,468
1618715522219.png
 

Users who are viewing this thread

Top Bottom