Diesel Mechanic Poser
Join Date: Feb 2008
Location: Choctaw Nation
Thanked 2 Times in 2 Posts
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Ive have been looking around about this one too. Ive read several things so far: hot shutdown; overtemp the turbo at any time (sustained high boost over 25psi, or high EGTs); overspeed the turbo at any time; time and number of heat cycles weaken the ‘spring’ in the seal. On a related note, low voltage on the FICM can produce symptoms similar to turbo oil seal failure.
For me, its typically about 90 seconds to cool my EGTs under 350deg when driving in at 600deg – so no coking/varnishing my turbo because of that. Ive got that going for me, which is nice. The overtemp situation may have had some effect on me during my last tow over the hills. I was holding some high boost for a while…but EGT below 1000deg. Now I puff a little for about 10 minutes in the morning. Not sure how to overspeed this thing and don’t know if ‘average’ folks like us can do it without nitrous or other stacked power adder. As for the heat cycling, time stops for no man.
The FICM angle is provocative (and doubly expensive). I read a little about it just last night but don’t understand it well enough to explain just yet – the electro-mechanics of it anyway. The short of it is, if you haven’t heard, many of us 6.0 operators are vulnerable to a random bad/cold soldering job in the FICM that causes a decrease in the necessary 48 system volts (and that Swamps is the place to go get it fixed). I get the impression that a malfunctioning FICM makes black smoke (and possibly white smoke) and the turbo seal failure makes blue smoke. All conditions mentioned tend to improve when the truck gets to operating temp.
diablos30, please post your turbo rebuild parts supplier information and parts numbers if you did the work yourself. NYC F-350, I know you have, but I don’t know if you did the metal oil seal on the turboshaft. Would you mind posting yours too if it wasn’t the 4C4Z-9V424-AA - Turbo cleaning kit? FWIW, I think Im going to get the ScanGauge II with Xgauge capability and not the Insight CTS since it can monitor EOT/ECT/FICMv/ICP/VGT/IPR and other critical things when programmed. The programming code is listed on the Org.
Originally Posted by The Dalai Lama
"With realization of one's own potential and self-confidence in one's ability, one can build a better 6.0"
Last edited by Lumberg; 04-12-2011 at 09:42 AM.
Reason: edited for FICM cause effect