D4K Engine Tappet Noise

I may be very wrong, but 2008 machine would have hyd tappets?

I don't actually know, but the Duramax does NOT have hydraulic lifters. So it's possible it has mechanical lifters.

Parts book shows mechanical lifters.

Ironman 3406 are you still out there maybe you can answer my question about setting the lifters on a Cat D4K machine?

I'm surprised one can hear a tappet over the normal diesel noise. Are you sure it's not coming from combustion, ie timing etc..

I'm surprised one can hear a tappet over the normal diesel noise. Are you sure it's not coming from combustion, ie timing etc..

Are you sure it's not an injector? We bought a D6C cheap once because the engine was knocking real bad, turned out to just be a bad injector and has ran fine since.

Jordan

I guess that is a possibility. I have a D7 17A that had an engine knock because of an injector pump but it was a really deep sounding knock. With this D4K being a higher RPM machine I am not sure what an injector would do in regard to noise? This noise is a high pitch metallic sound. I though it might be a lifter since this machine has mechanical lifters.

If I recall correctly, the mechanic that diagnosed ours just started cracking injector lines listening for a change in noise.