That sounds like "the tick" from a slipping cylinder sleeve. When it warms up, starts tapping against fire ring of head gasket. As speed increases, the slipping liner cannot stay in sync with the piston reversing, so the up/down travel shrinks and the tapping stops. But it is still moving, just not as far.

I have always wondered if cheap gas / oil residue on the cylinder sleeve might cook it in place for some period of time. That's what we need now, some voodoo chocolate chicken blood to mix in the fuel to glue that slipping sleeve in place.

 

That's what I always thought it was, Savannah (have we discussed this before?)

As long as it's not my oil pump, I don't really care.

Excellent theory about residue - this, we have not discussed before. Might explain a lot since it seems to calm down and reappear for a lot of us.

 

Changed my oil today to 15W-40 Chevron Delo. Hoping it helps. So far it is still ticking just the same, though I have only really driven up the street since the oil change. We'll see.

 

Anyone know where to find Rotella T6 15w-40. I haven't seen it around town. Can I order it online?
Thanks for any help or suggestions

 

Rotella T6 is synthetic 5w-40. Rotella T is dino 15w-40.

There is no T6 15w-40.

 

Thanks a lot.


QUOTE=dr. mordo;430149]Rotella T6 is synthetic 5w-40. Rotella T is dino 15w-40.

There is no T6 15w-40.[/QUOTE]

 

Also sounds like you haven't replaced your t-stat from stock to 180 t-stat. My ticking stopped when I switched out t-stat. I run 20-50 in summer (Castrol or Royal Purple) and then T6 in winter. I'm in Boston where it can get cold which explains the reason for the switch to a less thicker oil for winter use. Incidently, when running 20-50 during the summer months, ticking flared up occasionally; mind you this was pre-180 t-stat. So, there is some merit to using the thicker oil and minimizing the engine tick in the event you choose NOT to trade out your t-stat. And having switched to T6 about a month ago, along with the new t-stat, Tick-b-gone. I change the oil every 5k. Purchased my '03 in Feb 2013 and she had 69k for miles. I'm the second owner and have 82k miles. No off-roading; just every day car hauling kids around and the tail wagers.


FYI
engine temp pre t-stat hovered between 200-225f.
New t-stat range is high 180s (about 80% of the time, to a high of 202.)

 

I live in Idaho and run Rotella 15w-40 year round. It's about $12 a gallon at wallmart and Purolator filters at Amazon are $3.66 ea. Change ever 3k miles.

 

Wow, this is exactly me. Only differences is that I have a 2004 and I am running 15w40 rotella year round.

 

I ran T-6 all summer and the ticking got so bad that I was embarrased to go through drive-throughs. I'm convinced it was the liner issue. After reading several threads on this forum I changed the thermostat (lower temp) and the ticking went away immediately.

Curt '04 Disco