Engine knock after glow plug replacement.

[Can30Diesel]

Thats exactly what my 6.9 sounds like right now.

 

[cheddarbob03]

I just talked with the local injection shop and it's only a few dollars a piece to pop test the injectors. Definitely worth the $40 to narrow things down.

 

[cheddarbob03]

$2 per inj. to pop test. Nothing conclusive. Worn out but not bad. Decide eff it and pull the heads to find the issue. I pull the BRAND NEW GLOW PLUGS out and low and behold the effin new glow plugs tip is gone! Yay! I conclusively found the problem! FML theres a piece of GP embedded in the piston. Dam. Gonna talk to a machine shop in the morning and see what he advises. By the way they were Diesel Dr. GP's. I think the next new set will be zd-9's.

 

[typ4]

$ By the way they were Diesel Dr. GP's. I think the next new set will be zd-9's.

And there you go. Another for the do not buy list.

 

[icanfixall]

Not sure but did you actually pull a head or both heads and found a tip stuck in a piston? Glad you found the noise and its an easy repair. Please post a pic if you can. Your piston may be saveable. Remember they are 560 to 580 thousands thick in the center. And they get substantially thicker out from there.

 

[tbrumm]

While some people have had good luck with the Diesel Rx glowplugs (which are made by Wellman BTW), I did not. I tried them a few years ago and after the first cycle one of the them swelled and burned out. I was barely able to get the plug out. Never again! Beru only!

 

[cheddarbob03]

Yeah I pulled the passenger side head. Found the tip in #5 piston. It's been raining so I haven't messed with much yet but the piston should be fine. I'm going to pull the other side too and clean it all up with new gaskets and stem seals etc.