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Are glow plugs used on DI engines?

S

schiker

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I thought glow plugs were indicative of indirect injection. And direct injection used air heaters in intake.

Would a direct injection use a glow plug but only heat the head locally near the combustion chamber like a block heater???

Or are direct injected glow plugs just different design little block heaters or does the tip protrude into the combustion chamber too?
 
The DMAX uses glow plugs AND an intake heater. The glow plugs stick into the combustion chamber and come out right next to the injector tip. If you ever see one, they are LONG compared to those of an IDI 6.5 or equivelant. That is what allows them to stick down all the way into the actual combustion chamber instead of the pre-chamber.
 
Power Stroke Engines use glowplugs and my TDI uses glowplugs and there both direct injection. cummins though uses a grid heater in the engine instead of glowplugs
 
For example here is a cutaway view:
0904dp_03_z+diesel_engines+direct_injection.jpg
 
Woody35 said:
Power Stroke Engines use glowplugs and my TDI uses glowplugs and there both direct injection. cummins though uses a grid heater in the engine instead of glowplugs
Click to expand...

I'm not familiar with a grid heater? How does it work? Better/worse than glow plugs or the same?
 
mattthebrat said:
For example here is a cutaway view:
0904dp_03_z+diesel_engines+direct_injection.jpg
Click to expand...

My, what expensive injectors you have! (kidding of course).

You know, the more advanced and complicated stuff gets, the more I appreciate our "old and outdated" stuff.

Big power numbers aside, -inexpensive gets it done, -regularly if you know how to spin a wrench.

Anyone else with me on that?
 
yup, i'm with you on that.

mostly cause i can't afford a newer diesel, but i really like being able to fix my own stuff.

we have a 2006 F___ 6.0 engine at the farm that we dissasembled for kicks. Had the longest dang glowplugs i ever saw. :eek: but man, did they heat fast
 
same here. The older it is the simpler it is to fix. Hell look at how easy it is to rebuild a carb.

Glow plugs arent exclusive to just the IDI Diesels. Like stated, you can pull them from a DMAX and Powerchoke. Different sizes due to the fact that we also have a pre-combustion chamber vs the newer trucks that are direct inject.
 
Ratman said:
My, what expensive injectors you have! (kidding of course).

You know, the more advanced and complicated stuff gets, the more I appreciate our "old and outdated" stuff.

Big power numbers aside, -inexpensive gets it done, -regularly if you know how to spin a wrench.

Anyone else with me on that?
Click to expand...
I'd venture to say that majority of those that congregate in Jurassic Park here, are of that opinion. I could get a DMAX but why?

Until the wheels on the 6.5 fall off, or I can no longer get parts for it, well then, I'll be wheeling my ole dinosaur Diesel all the way to the bank with $$$ I've not had to spend in higher maintenance costs that the "modern trucks" have.
 
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All the cummins have grid heaters, almost all 18 wheelers also have grid heaters. Seems to be the norm for the bigger Diesel engines.

I agree with the above statements, I have owned a cummins and a duramax and I like my 6.5TD better. If it ever breaks down I can fix it myself!
 
im with you guys on the old truck all my buddies were all in our 20's have bought new yruck and they are making there payments and have no money but iv spent $6707.20 (i keep very good maintance records)on mine and $3950 of that was buying the truck and its all payed for plus i like workin on the old girl
 
Sorry for leading this thread in a direction it wasn't intended, BUT, -as long as we're off the beaten path talking about old school versus new school.....

I thought it was funny when a kid running a newer PSD followed me into the 7-11 parking lot to compliment me on the sound of my truck.

The conversation unfolded like this:

Him: Are you running a duramax in that thing? I saw you pull out back there and heard the exhaust, man, that thing sounds sweet.

Me: "well, no, this is pre-duramax and is based on the old 6.2"

Him: A 6.2? What's that?

Me: Well, let's just say that it's before your time.

Him: Oh, -are you chipped?

Me: No, I don't have a chip, -in fact, I don't even have a computer

Him: What? No computer?

Me: Nope, -wanna have a look?

Him: Sure

Me: (I open the hood and show him that there is only one wire to run my entire injection system)

Him: I don't understand how that works........


And so there ya go. The kids nowadays can't understand anything if it doesn't run on a computer.

I digress....
 
You are correct Ratman, I am 20, and there is only one other kid I know that has any knowledge of older stuff. I hate electronics, and love simplicity. I'm just getting used to all this computer stuff after I bought my '96 Chevy. :D
 
12ga diesel said:
I'm not familiar with a grid heater? How does it work? Better/worse than glow plugs or the same?
Click to expand...

Basically a hair dryer in the intake is what I understand. Shapes and sizes vary. They preheat the air in the intake so the compression stroke will get a head start and make it easier to build enough heat to combust on cold startup.

I am guessing the draw back is once the engine is running they can't really keep up with the air flow to add appreciable heat like afterglow with glowplugs so they are a little cold natured. ???
 
chevyinlinesix said:
You are correct Ratman, I am 20, and there is only one other kid I know that has any knowledge of older stuff. I hate electronics, and love simplicity. I'm just getting used to all this computer stuff after I bought my '96 Chevy. :D
Click to expand...

And I sincerely apologize, I should have chosen my words more carefully. I didn't mean to stereotype all younger-generation guys as being mechanically challenged. I know of many younger generation guys who have come to appreciate where all this stuff started, and want to learn how it works. I guess the majority of guys nowadays, -both young and older, have a tendency to not want to learn how it works, -they just want to flip out a visa and to have it go fast when it's done. I'm too poor to buy go-fast (new truck payment), so I gotta build it, -like the rest of the guys on the 6.5 forums.

Hey, aren't you the guy doing the twins?

If so, I'd like to buy you a drink and shake your hand! :thumbsup:

As far as your crash-course in stanadyne "electronically assisted" mechanical fuel injection systems, -well, -lets just say that we've all been challenged with it. ):h
 
mattthebrat said:
I hate computers...............

I know that is a bad thing for a 19 year old engineering student to say, but it's the truth.
Click to expand...

I don't disagree with ya, -I guess it's all in moderation. The really trick high mpg big power stuff wouldn't be possible without computers, -but it gets to a point where it is overwhelming, -and does not permit anyone to fix or repair anything.

If it breaks, you're screwed unless you got a big wallet.

Not my style :D
 
Ratman said:
And I sincerely apologize, I should have chosen my words more carefully. I didn't mean to stereotype all younger-generation guys as being mechanically challenged. I know of many younger generation guys who have come to appreciate where all this stuff started, and want to learn how it works. I guess the majority of guys nowadays, -both young and older, have a tendency to not want to learn how it works, -they just want to flip out a visa and to have it go fast when it's done. I'm too poor to buy go-fast (new truck payment), so I gotta build it, -like the rest of the guys on the 6.5 forums.

Hey, aren't you the guy doing the twins?

If so, I'd like to buy you a drink and shake your hand! :thumbsup:

As far as your crash-course in stanadyne "electronically assisted" mechanical fuel injection systems, -well, -lets just say that we've all been challenged with it. ):h
Click to expand...

No apology needed, all is well and good. :smile5: I just stopped at a couple body shops to see how much to do the bodywork on my hood, one place didn't even want to do it, the other wanted $1500 to do it, so I guess I'll be doing it myself yet again. :rolleyes5:

And yes, I am the one who is doing the twins. Passenger header done, now working on hood before doing driver's side header. Thank you VERY much for the encouragement, pipe is my specialty, but diesels, headers, turbos, and computers are new to me. :smile5:
 
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