95Z28A4 wrote:
Geordi replaced the rockers on my wife's CRD at 101K miles when he installed the ARP studs. The original rockers were still in great shape. They felt as tight as the new ones. I bought the CRD with 45K miles in 5/2014. It belonged to an elderly couple that towed it behind their motorhome (Blue Ox tow bar bracket still mounted on Jeep.) I loaded the GDE FT ECO tune at 49k miles and removed all the EGR pieces/part at 61k miles. I change oil every 6k miles with Mobil 5W-40 TDT oil.
Personally, I think that disabling the EGR and using good quality 5w-40 turbo diesel oil is what's best for keeping the rockers in good shape.
At 160k miles my rockers were still in good shape.
I never had a GDE tune.
Disabled EGR at about 60k miles.
Always used Shell Rotella 5w-40.
Oil changes typically between 8k and 10k miles.