Knocking from cam gear area on c-15

How did you set up the cam idler gear back lash. And are you positive you have it timed correctly????

 

While you have head off pour light oil behind valves and see if any are letting light oil pass thru to be sure you dont have a bent valve?

 

Ditto on checking the cam gear lash. It is adjustable and if you swapped the head it will for sure be different. If too tight it will also take out the front cam bearing in a hurry.

 

What part of alaska?

 

I have seen #1 injector get improperly adjusted, no-no go gauge slipped off the injector and it got adjusted way to tight. Knocked and sounded just like a loose cam gear.

Probably is just adjustable idler as mentioned here. Stethascope will help locate the source of the noise if its still a mystery

 

That doesn't mean they built it right. Alot of quality issues with cat anymore.

 

Is it a fuel knock ? Or a mechanical knock ?

 

Gear lash should be set every time the head is pulled. My first thought when reading this was the gear lash. I always set it between .005 and .008 on mine without a problem. Since you pulled the head off again just double or triple your steps. Did you get the cam seal orings on and cam was aligned right. Cam gear torqued down then injectors and rocker assemblies are all correct. What about valve bridges. Are the oval holes lined up correct and all in the same side. Are all of the valves sitting at the same height before anything was torqued down.