How long should I let the engine warm up in the mornings?


Currently I let it get to around 180-200 the drive easy for a while.

Do you think it matters? Start it and drive it. The injectors will fail WAY before the engine.

Heck you might even have 3-4 sets of injectors before the engine wears out.

As always your info is so helpful http://www.dieselplace.com/forum/smileys/Confused.gif http://www.dieselplace.com/forum/smileys/Big Smile.gif

And you wonder why you flamed every time you respond. Ive let mine warm up for 20 minutes before and it didnt get warm. So let it warm up lone enough to get the oil flowing 5 to 10 minutes and go.

Mike330R -


Most engine wear occurs at startup when the engine is cold. http://www.dieselplace.com/forum/smileys/Confused.gif


Warm-up time really depends on the ambient air temperature. On a cold day (10 to 50 deg. F), I warm mine up for 10 to 15 minutes. A 10 to 15 minute warm-up also gives me heat in the cab. In warmer weather (60 deg F and above), a 5 minute warm-up works for me. Well circulated oil (warm-up) is most important before loading the engine. Ditto for the Allison's oil supply.

Mike330R-


I'm in San Diego also, we're lucky that temperatures are mild. I just start mine, let it run for about 30 seconds then drive very easy for the first 3 or 4 miles. I don't think you need to let it warm up for 10 to 15 minutes like the folks in the mid west or back east where it gets really cold.

Thanks for the replies (from most of you http://www.dieselplace.com/forum/smileys/Disapprove.gif)

I beleive that it warms up much quicker with a load than idling.


So I give it a minute or two and then drive easy till I see 180 degrees.


Thttp://www.dieselplace.com/forum/smileys/Clown.gifNY

This is probably the only area where I abuse my truck. Mornings are not bad, I leave from an insulated garage where the temps never get below 35-40. I start up and drive away, and have 7-8 miles of 45-55 driving to warm it up slowly before getting on it on the expressway. My cardial sin: when I leave work late afternoon I start it up, let it idle 10-15 seconds, and drive away, no matter what the air temperature. I have one stoplight and just one mile of surface streets then I am on the expressway and cannot really baby it or I'll get run over. I try to keep it under 55 until I see the temp gauge come off the 160 peg, run 70 until the 185 mark halfway between 160/210, after the gauge passes the 185 mark I just drive it.


I have let it idle for 15 minutes or more when starting it up outside at zero degrees and the temperature gauge never did come off the 160 mark.....defroster worked but just barely.....


I run 5W40 synthetic oil which I hope helps my cold-engine lubrication. My oil pressure goes up to 90 and stays there until 160-170 degrees at which point it drops down to 60 or so. This for me is usually the other indicator that the engine is warming up. This can take 4-5 minutes during a cold start in the winter. I've never ran dino oil in the winter so I don't know what pressures you would see on a cold start.


If there was a way for me to plug in at work I would certainly be taking advantage of it. I have also thought about adding a remote starter to give the engine a couple of minutes to warm up. I'm parked over 100 yards from my work building entrance so walking to the truck and starting it up, then going back inside is not real practical.

Mike 330r
"As always your info is so helpful "

My info is accurate and is truthful. I guess you can't handle the truth.

cwolfe

"And you wonder why you flamed every time you respond."

I get flamed because people are negative and have other personal problems.

My post is extremely accurate. If your engine out lasts your injectors you give me a call OK?

It is also not good for our engines to let them sit and idle cold (fuel in oil) for 20 minutes. If you start your truck in cold weather 6 times per day and let it idle for a total of 120 minutes per day thats a wopping 14 hours idle time per week. 56 hours idle time per month. And over 600 hours idle time per year which is equal to about 20,000 miles wasted not to mention fuel costs.

Go ahead and idle your truck at every start up. The fuel alone would have bought you a new engine in 5 years.


What a waste......

Such small minds here.......

Edited by: problemchild

It is also not good for our engines to let them sit and idle cold (fuel in oil) for 20 minutes. If you start your truck in cold weather 6 times per day and let it idle for a total of 120 minutes per day thats a wopping 14 hours idle time per week. 56 hours idle time per month. And over 600 hours idle time per year which is equal to about 20,000 miles wasted not to mention fuel costs.



Who said anything about starting up their truck and letting it idle 20 minutes 6 times a day? Why go through all that calculation work when the original assumption has little to do with reality?Edited by: habanero

Mike 330r
I get flamed because people are negative and have other personal problems.


Such small minds here.......




I mean this as constructive criticism P.C.


It seems you have become more and more negative over the past couple of months. You get flamed because you are always negative. I can't think of a post where you are positive at all. Why don't you just sell your truck and find one that you like? I have a feeling you wouldn't be content with any brand.


And whats with the small minds comment? Not only is that just plain rude, but it would seem to describe you for making that comment. You overlooked one important piece at the begining of this thread. Mike 330r said:


"How long should I let the engine warm up in the mornings?"


He didn't say 6 times a day, you seem to be over exaggerating like you do in most other post/complaints.


Dude, we all have a great truck. Not everyone likes all of the options, some would like some more options. Not everyone of them will be perfect. Some of our service experiences will not be great. That's because it's all done by humans. WE MAKE MISTAKES. Try and look at the glass as half full, we have it better than most other people-we could be driving a dodge!!!-jk

Huh?

Im confused, the above posters suggest multiple minute warm ups. Read the one from dura-mike stating 10-15 minutes warm up. Thats what im talking about in my above post.

My posts over the last several months have all been factual, about parts failing and not working the way the -->FACTORY<-- said they would like UNI fiters.

I have always reported facts.

If you can show me one post where I flamed another individual or bad mouthed another member for no reason then I would like to see it.

I have not done what GENO did and make it a personal vendetta. He posted a thread in the war room that got taken down by the admins and he got spanked about it. He's not even man enough to admit it.

I posted that Uni filters dont filter.
I posted my oil pressure was low from delvac.
I posted my Edge juice broke.
I posted I have bad rock chips from h2 tires.

I really dont see where posting FACTUAL problems are an issue. If you disagree that the Duramax injectors have issues I would like to here about that. If you think the engine wont last 4 times longer then the injectors let me know.

My original post above said dont worry about warming it up because the engine will far outlast the injectors I was correct. Then I got flamed for posting the truth. If you disagree please post your evidence. In the 28 years I have been driving I have never worn out an engine, never. I have never warmed up an engine. I start it and drive it. I put 535,000 miles on a gasser by the same method.



Just look at the posts here from people who attacked me for no reason. I was simply posting the truth. The engine will far outlast the injectors so dont worry about warming it up.


Please cut/paste where I attacked someone negatively for NO reason without being attacked first.

Im waiting........

You gotta admit PC ,all Mike330R was asking was how long to let his truck warm up. A negative response wasn't necessary. I believe a short warm up is beneficial. (5 min.or less)

Mister


What the heck, let him post his problems and look at me and what I got. You have seen this type before all he wants is attention, http://www.dieselplace.com/forum/smileys/Confused.gif


Cuz

Mike


When you see the temp guage start to move is a good time for your area.


Geno

Huh?

Im confused, the above posters suggest multiple minute warm ups. Read the one from dura-mike stating 10-15 minutes warm up. Thats what im talking about in my above post.

My posts over the last several months have all been factual, about parts failing and not working the way the -->FACTORY<-- said they would like UNI fiters.

I have always reported facts.

If you can show me one post where I flamed another individual or bad mouthed another member for no reason then I would like to see it.

I have not done what GENO did and make it a personal vendetta. He posted a thread in the war room that got taken down by the admins and he got spanked about it. He's not even man enough to admit it.

I posted that Uni filters dont filter.
I posted my oil pressure was low from delvac.
I posted my Edge juice broke.
I posted I have bad rock chips from h2 tires.

I really dont see where posting FACTUAL problems are an issue. If you disagree that the Duramax injectors have issues I would like to here about that. If you think the engine wont last 4 times longer then the injectors let me know.

My original post above said dont worry about warming it up because the engine will far outlast the injectors I was correct. Then I got flamed for posting the truth. If you disagree please post your evidence. In the 28 years I have been driving I have never worn out an engine, never. I have never warmed up an engine. I start it and drive it. I put 535,000 miles on a gasser by the same method.



Just look at the posts here from people who attacked me for no reason. I was simply posting the truth. The engine will far outlast the injectors so dont worry about warming it up.


Please cut/paste where I attacked someone negatively for NO reason without being attacked first.

Im waiting........


Dam rite I did and I am not the only one, but one thing for sure I gotta UNI and it works.


Your only problem you like to make a issue out of the problem before contacting the manufactor, blowing it totally out of proportion when it could of been settleted with a few kind words, but you gotta be mister big and make a big deal out of it. Look at me type Duuuuuuuuuh


Geno

I run synthetic. If it's warm, 20 degrees or better I give it approx 5 min at high idle. When it coold down, 0 to 20, I let it run somewhere between 5 and 10 min. Cold, below 0, anywhere from 10 to 15 min. If I waited for it to hit 180 idling, I'd never be able to drive it!


PC, you messed up. Quote from above: My post is extremely accurate. If your engine out lasts your injectors you give me a call OK?


Heat of the moment, you got that last sentence backwards. After what you said in the first sentence there, I'm thinkin you need to get some of that egg off yer face! http://www.dieselplace.com/forum/smileys/Big Smile.gif

Mike330R,


Just watch your volt meter until it jumps above 14v and stays there. That will mean that the intake heater has turned off. Down in San Diego I wouldn't let it idle more than three minutes before leaving. Try to take it easy until the guage shows 170ish and don't worry about it, your conditions are VERY MILD compared to ours up here.


PC,


You were way out of line. The notion that injector problems invalidate other concerns is not only false, it undermines the purpose of this forum.


On the bright side,


I just arrived home from a 5 day snowmachine trip that was absolutely awesome. I drove a total of 10 hours pulling 5 sleds and had 4 passengers and all our gas and gear. Conditions varied from ice on hairpin turns to 85 mph cruising. The truck functioned flawlessly, and EGT never hit 1200f running J/A level 2. I have never been more impressed with a truck. --SShttp://www.dieselplace.com/forum/smileys/Big Smile.gif

5 seconds or so after oil pressure comes up. Easy going until temp shows 1/2 or so.


Maybe 30 seconds of warm up in the winter...(30 absolute low)

Thanks for the replies. I think I got it covered now.


http://www.dieselplace.com/forum/smileys/Big Smile.gif

If you can show me one post where I flamed another individual or bad mouthed another member for no reason then I would like to see it.


Im waiting........


http://dieselplace.com/forum/forum_posts.asp?TID=5942&KW

You know Problemchild I understand your frustration but remember... the squeaky wheel doesn't always get the grease, sometimes it gets replaced. By the way feel free to use my avatar, I think it fits you better.

Mike330r

http://dieselplace.com/forum/forum_posts.asp?TID=5942&KW

That post was white dots I drew on a kennedy filter joking about being able to see sun light through it. Kennedy attacked me. I joked back.

So your response is wrong again.

Still waiting for a negative post I made about any other member here for no reason.


My original post here was not attacking and "way out of line" as some here in this thread have stated falsely.

Your comments are out of line.

My original post here was start it and drive it. The injectors wont last nearly as long as the engine.

It was NOT an attack. It was NOT negative. It was the truth.

Does ANYONE here think the injectors will outlast the engine?

Well????????????

I post a FACT about GM's poor quality and insight into fuel changes in the USA and get attacked personaly by several people here.

Im sorry but I think you are unable to see and understand simple facts. The injectors will fail before the engine, which was my original statement.

Feel free to make another personal attack. The simple minds statement shows true for you.

Hey Geno...you are the only one!

And I will be interested to see your posts 40k from now about your engine burning oil from that sand sucking uni you run.Edited by: problemchild

I have an unusual situation in that it is cold here, and the first 3 miles of almost any trip is all downhill, about 1100 feet. Not much warm up in those 3 miles.


I use 5w-40 Rotella Syn year round. On start up, I let it idle for a minute, then move around the driveway on little or no throttle before I go down the gravel road for the first 1.3 miles at no more than 30 mph.


Going the reverse route up the 3 mile hill always warms up a luke warm engine to full operating temperature!!

Here we go again... Why don't we get a response from Brokers.. I believe he has put well over 400,000 miles with only one or two failed injectors on his DMAX trucks. NO DMAX injectors will last longer than the engine??? Well at 400k-500k miles I don't think there is a problem... Will my injectors out last the engine, don't know, but at 18,000 miles, I haven't had one trip to the dealer since purchase. Maybe I got one of the good ones that slipped by. It is a conspiracy by GM to produce CRAP so we have to buy new trucks every couple of years. This is old, but rather entertaining. Same fight, same people. PC, maybe you otta join the class action lawsuit some other new member is toting on a thread in this forum. You know, 'cause the injectors are crap and all.....


To stay on topic, I let my truck warm up for about a minute, then drive off easily.


Bob

I let mine idle until a minute or two past when the voltmeter comes up to 14V on a cold start. Warm starts, it's 10 sec or less. Edited by: CStone

I read somewhere that it takes 60 seconds for diesel oil to circulate through the engine...


Only 20 seconds for a gasser...


Dunno why... But my rule is never to move the truck unless it has run for a minute......

I mean this as constructive criticism P.C.


It seems you have become more and more negative over the past couple of months. You get flamed because you are always negative. I can't think of a post where you are positive at all. Why don't you just sell your truck and find one that you like? I have a feeling you wouldn't be content with any brand.


And whats with the small minds comment? Not only is that just plain rude, but it would seem to describe you for making that comment. You overlooked one important piece at the begining of this thread. Mike 330r said:


"How long should I let the engine warm up in the mornings?"


He didn't say 6 times a day, you seem to be over exaggerating like you do in most other post/complaints.


Dude, we all have a great truck. Not everyone likes all of the options, some would like some more options. Not everyone of them will be perfect. Some of our service experiences will not be great. That's because it's all done by humans. WE MAKE MISTAKES. Try and look at the glass as half full, we have it better than most other people-we could be driving a dodge!!!-jk





AMEN BROTHER, http://www.dieselplace.com/forum/smileys/Approve.gifhttp://www.dieselplace.com/forum/smileys/Clap.gifhttp://www.dieselplace.com/forum/smileys/Approve.gifhttp://www.dieselplace.com/forum/smileys/Clap.gifhttp://www.dieselplace.com/forum/smileys/Approve.gifhttp://www.dieselplace.com/forum/smileys/Clap.gif


Sounds like a typical left coast liberal. Never can point the finger where the blame really lies. All excuses with almost no evidence to back up his claims. As I said in my posts on the UNI, PC got a bad filter, but that does not mean we all did and if he had approached it better, I guarantee he would have come away satisfied or at the very least, refunded.


On topic, let your truck's volts rise above the 14 (credit to the one who posted this earlier) and make sure the oil pressure has built up, you should be good to go from there. Takes mine about 30 seconds for this to occur.

P.C.


We're all here to enjoy, learn, and help each other...at least thats why I'm here. I'm not really sure why your here.

I let mine idle until a minute or two past when the voltmeter comes up to 14V on a cold start. Warm starts, it's 10 sec or less.


FYI - the manual says that the engine should be run for at least thirty seconds prior to putting it in drive (requirement of Allison Transmission) - I think it says "in order to build adequate pressure". I suppose it depends on how long the motor has been shut down.


- jeffEdited by: dmax lover

I read somewhere that it takes 60 seconds for diesel oil to circulate through the engine...Only 20 seconds for a gasser...Dunno why...


Never heard that one before. I know, you said you dunno why, but I hope someone can explain that. It makes no sense at all. all other things being equal, the time shoul dbe the same for both.

I kinda feel for Problemchild. 8 injectors at 30k and another failing at 50k... makes me not care about warm up time. Really hoping engine will grenade under warranty!!! Older diesels needed warm up because they did not have computer controlled injection systems and would run rough, smoke, shake rattle and roll. In my humble opinion, the ECM adjusts for cold engine conditions so anything beyond the 30 sec allison warmup is not necessary! This is, of course, just my opinion.http://www.dieselplace.com/forum/smileys/Wink.gif

Well, I violated the "Man" rules and read the manual. It says to let it idle for a few minutes to make sure the oil pressure is up. No more long warm up periods for me.

We would really be in trouble if it took several minutes for the oil pressure to come up. Later! (semi old man) Frank

If I recall correctly, long idle times were not the best idea either due to cylinder wash out. Mines in the garage so its warm all the time (AZ!), but I still take off slow and don't get upto freeway speeds until several miles later.