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if you are not towing anything and in city traffic for a few blocks do you need to let the truck idle for a few min. before shutting it off. I am not talking stop light after stop light but a few min. of driving slow.


Tom</TD></TR>
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<DIV id=hotbar_promo></DIV></TD></TR></T></T></TABLE></BLOCKQUOTE>Edited by: bearnc1

I hardly ever drive in conditions where I am going slowly for very long, so I usually don't encounter this. However....

A couple of weekends I went up to Spokane, and had to drive up most of Division Ave. Stop and go, 35 mph speed limit, heavy heavy traffic. Pretty warm for the time of year, outside temp prob in the 70's but with all the traffic and blacktop definatley higher than that at the surface. When I got to my destination, the temp had risen quite a bit, almost to 210. I wasn't too worried but I did let it idle for a couple of minutes to let it cool off.

However, I have pulled horses in hot weather, and always let it idle for quite a while before I shut it down.


Just my .02

Bob

If I am not flogging the truck for the last couple of blocks, my EGT's are about 350-400 with stock exhaust, so I only cool for about 30 seconds. If driving hard, it seems to take about a minute for my EGT's to come down to 300.


Bob

From what I've been told (I'm no expert), 30 seconds to 3 minutes for cool down when coming off of load on the engine, depending on the loading and duration of loading. Usually you get 30 seconds+ just slowing, turning, parking.

Only if you come off a hard pull and stop should you worry about the turbo on the Dmax. It's got water cooled bearings and is a pretty tough unit.

There is no mention (as far as I can remember) about cooling down the turbo in the owners manual.

My new Cummins manual specifically addresses turbo cooldown with a chart and run times. Normal driving without working it needs no real cooldown. Most will say if you come off a highway and drive a mile or more off the highway, that should be cooldown enough.

Hoot howz the dodge? You like it?

Yes I do so far.

The Ford 6.0 specifically says "up to 10 minutes" , depending on load of course. I would guess that since the 6.0 and the LLY have the same turbo, this would apply to the LLY. ?


Personally, I make sure the temp. on the Attitude says less than 350 before I shut down. The thought of oil sitting in the turbo bearings and coking up makes me feel http://www.dieselplace.com/forum/smileys/Confused.gif

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<TD id=HB_Focus_Element vAlign=top width="100%" background="" height=250 UNABLE="off">I have stock guages on this truck and the higest I have seen the transmission temp. is around 170 degrees when towing the 5th wheel.</TD></TR>
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<BLOCKQUOTE id=e5d27626>I only ha</BLOCKQUOTE>

If you engine brake as you come off of the freeway or whatever, your EGT's will drop to less than 200 if you can do it for more than 10 seconds.


Works good in a 6 speed to downshift and let it run down from 3500 rpm...


No braking needed with this method either...