Says lbz right there.
Then why you mention LLY if you knew it was an LBZ?
grid heater delete
- Thread starter Prodiesel23
- Start date
Then why you mention LLY if you knew it was an LBZ?
Because he asked if any harm will be done trying to start/run the truck with no intake heater..so I mentioned the fact that lly's (04.5-05) don't even come with one from the factory.
Why did you bring up "shooting in the dark" when you knew it was in the LBZ section?
It seems to me the LB7s and LBZs warm up faster then the LLY. For sure the LBZ will not only does it have the heater, but the trans will put a load on the engine. When they came out LBZs where burning up the trans in -40* weather due to the load and the fluid being to thick to flow.
You serious, Lb7's are notorious for warming up slow
And fwiw my lb7 does not warm up any slower without the healer coil
Both of my lbz's have the intake heater deleted. They still start just fine at -10 deg and can't tell any difference in warm up time. Only thing I do notice is a slight hazing at idle, but they hazed alittle before. Unless you live in an extremely cold climate I don't think you need it.
Yea if it's cold out and my Lbz is in high idle it loads the engine up. After 5-10 min I have a Trans temp of almost 180 and the coolant temp has barely moved off the 160 mark. Needless to say I don't put it in high idle anymore for fear of burning up a trans
You got something wrong with your truck when you first start your truck and you let it idle for 10-15 minutes your trans temp should barely if at all move my lbz doesnt budge until i drive it a good 30 minutes after leting it warm up for 10-15 minutes in 20° heat or lower
Yea when it builds heat it's in high idle and the trans puts a load on the engine. If it's not in high idle it never gets warm by the time I get to work
I shouldn't say "ice cold". What I meant was it doesn't move the gauge at all until I've driven about 3-4 miles.
It applies certain clutch packs (I think C5 and C4, I could be wrong) to effectively create a "tie up" inside the trans, which stalls the turbine, and then increases engine RPM.
This places load on the engine because it has to overcome the locked turbine in the converter.
Its effectively the same thing as if you were to sit there with the trans in drive, hold your foot on the brake, and increase the revs to 1100rpm. Power-braking it. Uses the stalled converter to both load the engine, and produce heat in the converter, thus warming the trans.
Its a pretty clever idea.
If you listen closely to an 06+ when it goes into high idle, first the engine increases RPM's, then about 5 seconds later, you'll hear the engine change tone a bit and hear something from the transmission....thats the transmission shifting itself from "neutral", where the turbine rotates freely, to locked-turbine/stalled converter.
Ben
There is a "Recall" that will fix the issue. Maybe you have read up on it, but there was lots of discussion on the subject if your interested. I know its cold up there, but I would think you could use HI most of the time.
You could have the recall done.
I don't recall how it loads the trans. I just know it burns up converters due to the fluid being to thick at -40.
Edit: Bens got it I figured that was how it was done, but wasn't sure if you could just ramp the pressure way up to load it.
Last edited:
You can really hear it load the motor without a VVT. Its a very pronounced change in exhaust tone.
Rarely gets cold enough for high idle where I live, it did a couple weeks ago. Started the truck got out to bring the garbage cans to the house and it's quite a sound to hear the truck go through the sequence you describe (while outside the truck), I knew what it was and the truck sounded possessed, it started the procedure about 45 seconds after I started the truck.
Last edited:
my LB7 is not fast at all at warming up. neither before or after the heater was removed.
all i do now is in 40-60* weather and its been outside, start it 15 min before i leave. 30-40* i start it 20min before leaving, 30 and below it gets a full 30 min.
and still, its barely blowing warm air when i hop in the truck lol. greatest thing for that was a remote start and training myself to turn defrost/floor heat on, max blower on before she was parked for the night. made for a better mornings in snowy flagstaff
all i do now is in 40-60* weather and its been outside, start it 15 min before i leave. 30-40* i start it 20min before leaving, 30 and below it gets a full 30 min.
and still, its barely blowing warm air when i hop in the truck lol. greatest thing for that was a remote start and training myself to turn defrost/floor heat on, max blower on before she was parked for the night. made for a better mornings in snowy flagstaff