Don't know what injector replacement cost, mine were done under warranty. I've head the injectors alone are about $400.00.
As far as the injector problem on my truck, everything tested out good, fuel pressure 55, FICM good, etc. Head studs appeared to be improperly torqued and torqued without torqueing lube according to mechanic. Said there was no evidence of lube used when studs were installed by previous mechanic and when replacing a valve cover gasket and I think even a head gasket for an oil leak just prior to the injector problem he had to take the studs all the way out and put them in a vice to remove the nuts from them. I know very little about the proper procedures here reguarding the ARP studs but I do know that a torquing lube is supposed to be used when torquing these nuts on the studs to acheive proper clamping tension. He doesn't know what caused the injectors to fail but thinks it's possible that some coolant got into the oil and caused a problem with the injectors by coolant cantaimination in the oil since the head bolts appeared to be improperly tightened. So, he removed all head studs, reinstalled and torqued with torqueing lube to 250 ft lbs, then changed my oil. Even though the truck is still under warranty that cost me about $300.00 because ARP head studs are not an OEM part which sucked but I understand
. The oil change was kind of a bite because I had just changed the oil less than 300 miles prior to all this happening using my precious Scheaffers 15w-40,but hey that was free because it was warranted
. Everything seems to be fine now. I still have a sample of oil from the last change that I didn't send of to be analyzed but I'm going to do that this week.
I have know way of knowing what any of the mechanics do or don't do or if what they tell me is the truth but I have to place my trust in them. It does make you a little wary when you leave your vehicle with one guy that you trust 100% and then down the road another mechanic that you trust 100% tells you that the last guy you trusted didn't do the job right. Puts you in a position of feeling like you can't believe anyone. One reason I started working on my own toys was because the powersport guys were telling me lies and ripping me off. I just don't see the diesel mechanics I trust doing this but it still leaves me a little uneasy.
Anybody have any thoughts on my experience with improperly torqued head bolts, or coolant in the oil causing injector failure. Any techs input would be great.