I need to do this job also ...w/ 176K miles on the clock and the glow plug light staying on......

I'm wondering if burning some B100 might have dissolved some of this carbon buildup ??

Back when diesel ran up so high....at one time almost $5.00/gal in CA......I had a good source and .... . bought a couple of 55 gal drums of it and burned it....sometimes straight....sometimes 50/50......until it was gone. Haven't used any bioD in about a year though.

Guess I'll find out when I pull the manifold......been dreading the job and putting it off for several months. Maybe I should burn a couple of tanks before doing the job.

Warren C.