Any way to know??

[Hammerhead]

(10-21-2017 )JMBT Wrote:  CM 2250 demandated, smokes a bit after I idle to warm up, once I start down the road. It quits smoking entirely once I am cruising down the road. Doesn’t smoke at all after I have idled at a stop light, or anytime after the truck is warmed up and running, even in a hard pull or hard jake.
I have talked to several on the forum about it and the general consensus seems to be, failing valve guide seals.
My question: is there anyway, other then pulling the exhaust manifold, to be sure it is valve guide seals before I fork out $1000 for tools and pull all of the injectors???
Thanks

You could pull the valve rocker shafts and visually inspect the v/g seals with a light and magnifying glass. It's not a "perfect" way to do it, but it will give a fairly good indication.

I don't know what you have for tools, but the valve spring compressor isn't that expensive, and it really is the only special tool really required. A decent pair of water pump or channel lock pliers will remove the old seals. I use deep well sockets to install the new ones.
If you have everything to R&R the injectors, all you really need is the spring compressor, and it's only about $300.00 iirc.