[domwri]

Hello guys,
I'm new to the forums so please bear with me. I have a reaccouring oring on my number 5 injector that keeps blowing. Its the lower fuel oring and it blows after about 300 miles of perfect, no problem starting/driving. There are no symtoms till it accually happens. Both times it has blown I was driving at 70 mph on the hwyway without a load. It blows and then white smoke and it then shutters and dies. Starting it back up is very hard and then it will die becasue of hydrolock and will not turn over again. Apon inspection the lower oring is blown and the cylinder is full of fuel. Last time dealer replaced oring and re torqued to specs. All numbers are good on the CTS monitor. SCT tune was on performance at both times of malfunction. I just had major work performed on my truck, its listed below in the specs. Thanks for any help you may offer I'm stumped and this is getting expensive.

Some specs of my truck
06 F350 CC SB FX4 Lariat; 79K on truck, new in the last 1000 miles: ARP studs; new OEM gaskets; heads redone w/ hardened seats, MBRP turbo back, cat delete exhaust; IPR screen upgrade, Coolant filter; Fumoto valve, Blue FPR spring; BulletProof EGR cooler, OIL cooler and Oil bypass filter, BilletWater Pump, 6.4 Banjo bolt upgrade, new glow plugs, 5w40 rotetilla syn, Sinister coolent bypass, FICM checked 48.5-49v, SCT X3, CTS Edge Monitor, EGT Probe, All new oil/fuel and tranny filters. I may have forgot somethings. Please help!!

 

[domwri]

THanks

Wow thanks for the fast reply. Question? Is the Injector sleeve and the cup the same thing or?? Thanks for the info I really appreciate it. Dom

 

[domwri]

Cup replacement and questions

Injector cups=injector sleeves.

If they are the front 4 cylinders you can do them in cab with the ford installer/remover.

If they are the back 4 cylinders youll need the whittaker cup tool. And its not cheap. I know i have one.

It's the number 5 cylinder so if my math is correct it is passenger side 3rd one back, so it looks like I'm going to need that Whittaker cup tool. Anyone around Mesa, or Phoenix AZ have one we can use. Otherwise I'm going to have to buy it and sell it afterward. THanks for all the feedback guys. Also does ford sell just the one cup or do you have to buy a set of 8. On anothe r note, I'm frustrated becasue I just had these heads redone 1000 miles ago, (valve guides, hardened seats, magnafluxed and straightened) and they never mentioned anything wrong with the cups or their need for replacement. THis was a highly respected place in Phoenix that bulletproof sends their heads too. Is it normal for them not to check the cups. I paid over 1250 for their work on these.

 

[domwri]

Thanks guys this is great. Keep the info coming. This truck is being fixed to go into the oil fields of ND. So it has to be rock solid and work daily for its food.. Thansk again for all the help. I'm going to forward this to my guy doing the work..

 

[domwri]

Just wanted to follow up this post. I had my mechanic take out all the injectors and check them for problems. Turns out another one was also ready to blow (#8). He hired another tech to look at my engine with a fresh set of eyes and the new mechanic told him the torque setting on all the ones he took out were off. Tightest was only at 14 lbs. So all injectors were taken out, cleaned, injectors cups cleaned and bore scoped to verify, new glow plug harness installed and all new orings and hold downs replaced. All oil cleared out of hold down locations and everything put back in and torqued to 26 lbs. SO far!!!!! 1800 miles later everything is good. Just shows you how valuable a good mechanic is and that bad torque setting on these 6.0 can be disastrous.