hey yall some guy told me that the quint essentials for my new 04 LLY are another transmission cooler, it already has one, he says double up! and a timer like the big trucks use so that after long spells on the highway I just shut her off and go inside and she'll keep running and cool down for 10-15 minutes then shut off and be all locked up by herself. Is this turkey telling me the right stuff? I mean he does drive a ford powerstroke, but hell maybe he knows what hes sayin'. http://www.dieselplace.com/forum/smileys/Geek.gif

jmg343,


The stock tranny cooler on the Duramax works fine for most folks. However, if you plan on towing BIG loads in a hot climate or you may want to consider a cooler mod. (See Mike L's Building new Ally cooler ( http://dieselplace.com/forum/forum_posts.asp?TID=9159&PN=1) topic in the Allison Forum). Regarding cool down timers, these are good for hardworking diesels that use only oil to lube and cool the turbo bearing. The Duramax uses engine coolant (and oil) to cool the turbo bearing so an extended cool down timer isn't needed. However, it's still a good practice to let the engine idle for a few minutes after a hard run (IMHO).

Just continue reading the forums and enjoy your new ride! http://www.dieselplace.com/forum/smileys/Big Smile.gifEdited by: jbplock

jmg343, I use a pre/post luber on my turbo charged engines. I'm sure several people will say it's not need but the cooling and oil system fail when the engine is off. So here's the decision you have to make; 1) sit and idle the engine to what for the turbo to cool off as well as spin down. Or 2) Invest in a pre/post luber. It pressurizes the engine prior to start to prevent bearing-to-bearing contact during startup and post lubes the turbo during engine shut down for 2 to 5 minutes to provide lubrication which provides the cushion for the turbo to spin down and take away excess heat. The engine is not running as with a cool down timer. If you would like a link on the product I use send me an email.


Edited by: A/Cman

I believe that water is circulated in the turbo to aid warm up(its controlled via a thermostat to close when it gets hot I believe) The water in it may help as a heat sink so to speak but anywho…..I don’t shut my truck off until the EGT guage says its 300degrees. Normally even after flogging it this will only take 2 minutes tops, most of the time if I am driving around town and being nice it will only take 30-60 sec. I bought a “turbo lifesaver” by brand name. I believe letting your truck idel down for a minute or 2 definatly cant hurt. I bought what I did for 2 reasons. First I don’t have to stay in the truck to let it cool down, I can take my keys and leave it all locked and happy and be on my way. Second is I can take my keys out and leave it running for up to 250minutes with the model I have, unlock it, hop back in and stick the keys in the ign and press the brake and be off on my way. One thing that is a weird quirk though is after you get back in and put the keys in it you have to wait a few seconds before you stick it in gear or the Allison gets freaked out for a few seconds and starts in 3rd. Duno what that’s about but if you let it wait a bit its fine. I like being able to go into the quicky mart and leave my truck locked and running. If someone touches the brake with the key out it kills the truck. If my truck will idle for more than 10minuets or so I will shut it off. A luber would be really cool too…maybe even more overkill than a turbo timer but niether one can hurt.

I believe that water is circulated in the turbo to aid warm up(its controlled via a thermostat to close when it gets hot I believe) The water in it may help as a heat sink so to speak but anywho…..I

This works exactly the opposite, the diverter valve located on the metal top radiator hose after the thermostats prevents water from circulating through the turbo during warm-up.