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Showing results for tags 'engine noise/knock'.
Found 2 results
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Hey guys, I'm just looking for suggestions on what to start checking for this engine noise. Best described as a tap with a squeak happening at about 1/2 of idle speed RPM. I hear it loudest with a stethoscope at the rear top of the engine. Vehicle is completely stock. Never had any engine work done. Oil changes done faithfully and currently using Amsoil SS 0w-20. Yes , i drive a lot and I've had to do just about every repair these vehicles are known for, But never messed with the basic engine. Maybe cam, HP fuel pump?? Thank you. -
6.0 LQ4 Severe Engine noise when starting cold start
Noveske2016 posted a question in Ask the GM Technician
I have a 2000 Yukon XL 6.0, when starting engine cold, engine has a severe engine noise and is getting worse....let idle to warm and noise is there but quieter...take for a test drive )Hard 2-3 miles) noise goes away...no loss of power, no engine codes. I was a service writer for Chev from 99 til 2010 and remember something about the new LS engines at the time with cold start engine knock and piston skirts being to short, I have heard my fair share of them but none have sounded as bad as this is. My next step will be to remove the oil filter and cut it open to look for metal...any other ideas??
