Archived Need help on deciding what way to go first at the shop: Pull the head or the cam?

[Tuesdak]

Need help on deciding what way to go first at the shop: Pull the head or pull the camshaft?

We are dealing with the knock detailed in this thread:

https://www.turbodieselregister.com...dge-5-9-diesel-NV5600-knock-tap-clatter-Ideas

Shop says the knock goes away when they zero out the lash on the #6 exhaust (or intake I forget) with the engine warmed up. Said they did so with the engine running and have added a gal of oil doing so. They can't get a good look at anything lifter wise on the #6 with a boroscope.

Head is painted grey. It's been off for some reason. Valve lash was done at 98,000 as well as: cooling fan, hoses by PO. IMO Something happened at 98,000. It has 118K on it now I got it at 101,000 and it ticked from day 1.

Shop says it's going to be expensive from this point on and they suspect a lifter problem. It sounds like a lifter/valve train noise. Least it isn't fuel injection related! I asked the shop for an estimate/combo to do what it takes - I mean the folks doing the work need to be paid - but we are at exploratory surgery now.

So do I guess bad head work done and pull the head off?

Or do I gamble that the head work didn't fix the problem and go for the camshaft?

While we are there anything we should do? (Freshen up etc.)

 

[Tuesdak]

Bump! Other thread updated.
Head is off. Is this oil we are seeing with the extreme carbon deposits?

Only optional question is sending out and testing injectors.