2003 Durango here with a 4.7. Started the truck on Auto-Rx a few months ago to deal with early morning motor chatter and slight ticking. I am now 150 miles into the rinse phase. The chatter is still there on certain mornings but the tick seems to quieted down quite a bit. Well, last night, after the truck sat for 3 days I started it up and it chattered for about a sec. The oil pressure light stayed on for a second longer than usual and the car actually beeped, drawing my attention to the light. It then abruptly went off almost coincided with the chatter going away it seems.
So my question is, can this be related to the rinse stage or am I looking at an issue with the motor?
Perfectly normal for the rinse phase. Perhaps not uncommon would be a better way to put it. When I did my first Auto-Rx treatment I was trying to get rid of an odd HLA noise that lingered after start up. When I went to the rinse phase I had a few more ticks as some stuff cleaned up faster than other areas.
No. You don't need a new engine. Just hang in there and everything should quickly get back to normal.
-- Edited by geeaea on Monday 21st of June 2010 08:15:29 AM
thanks geeaea. Good to hear. HOw did that clean up go? did the HLAs quiet down? I was also wondering, instead of changing out the filter at 1500 miles, can I do a complete oil change? Aside from the obvious additional expense, can the rinse stage be negatively affected by fresh oil introduced at this point?
I think that outside of the extra expense, that there is no problem changing the rinse oil early. Just make sure to keep with a non-synthetic, non-high mileage for best results. See approved oils list.
The clean up on my engine did quite well That oddball lifter tick is a characteristic one for the 3.0 Mitsubishi of that vintage (92). It would start quiet and then one by one the lifters would start ticking and then one by one stop ..repeat until the oil got cycled through the engine a few time. Nothing worked on it. Not Gunk. Not Marvel Mystery Oil. I finally said "what the heck, give this a try" ..and viola~!
