ahspots

I need help. Last night I ran my truck and went throgh 4 glow plugs. I have a new piston and sleeve installed and broke it in last week. engine temp is around 230-250. I tried 2 #8 and 2 McCoy 59. Running 20% nitro. Air filter is clean. Did I have a run of bad luck or am I missing something. Thanks

Devilmanak

My Feedback: (1)

If it ran fine (or ran) before changing the p/s, then start there. Are all the head shims still in the engine? Why did you change the piston/sleeve? If because dirt got into the engine, then there is likely still dirt in the engine, unless it was flushed well. Also, is your rod bushing worn? If the crank pin or bushing is sloppy, it will make the engine eat plugs.
Better yet, what did the plugs look like after they went bad? Element defomed or even gone? This would indicate either too lean or detonation.

Devilmanak

My Feedback: (1)

Also, I had an S7 that used to eat them, the rod bushings, upper and lower, were disintegrating and killing plugs. Did you damage the upper bushing when changing the piston?

ahspots

I changed the p/s because the motor would die after it warmed up and would not restart. I had 6-7 gallons threw it, and I race it in the sands of Kuwait. The motor was cleaned prior to reasssyembly. The glow plugs looked fine except one snd the element was gone, all the bushings looked fine, I did not mic them or anything. I guess that could be the problem. I will race it this weekend and see what happens. If it gets hungry for glow plugs again I guess Ill buy same new parts. Thanks for thr help

jefx

Was the plug that was missing the element one of the first to go bad? If so, than that's probably the answer. The old element that fell out has probably disintegrated inside the engine, and the metal shavings/dust from that element are probably attaching themselves to the elements of the new plugs and burning out.

ahspots

thanks for the info I hope that was it.