Glow Plugs

[aQUASCAPER08]

Can someone explain the grid system that is in the Cummins as apposed to glow plugs? Thanks

[RedRum]

The grid system is in the intake manifold. It heats the air as it passes through the manifold and is then forced into the cylinders. I'm not totally sure, but I think the glow plugs heat once the air is already in the cylinders. Also, I don't think the grid system runs once the engine is warmed up.

I might be incorrect on this, but this is my understanding.

__________________
07 3500 Big Horn QC, 5.9, 6-Speed, ISSPRO Gauges, AFE Stage 2, Smarty Beta 4.44, Straight Piped, 6" Superlift RockRunner, Bilsteins, dual steering stab. 37x12.50 BFG M/T 466rwhp/874rwtq "I caught that diesel thing, now it stings when I pee"

[smithmilehi]

You need to fill in your sig so we know what truck you have. I only know how my 05 works. The engine has a grid heater on the intake and a fuel heater in the fuel filter canister. Both are operated by two sensors, an ambient air temp sensor and a battery temp sensor. If both those sensors show thats its cold enough then they will heat the air and fuel to start the engine. Since it is known that an inline has always been easier to start than a V8 the Cummins does not need glow plugs. Hope this helps

__________________
05 5.9 3500 long bed single quad cab. Banks high ram and 6 gun, AFE intake, Magna Flow exhaust, BD cool down timer, brake, X-monitor, steering stabilizer, Firestone air bags, Air Dog, Amsoil bypass. Big Thanks to Jbarker www.hollandcourtdieselperformance.com[/url]

[aQUASCAPER08]

Sorry about the incomplete infor. Newbie

I have a 06 2500

[jbarker]

welcome to cummins forum and the Colorado chapter

John

__________________
99, QC short bed running the best of the best and proven to perform. A daily driver that gets 19+MPG and runs a 12.86 @ 104 mph 1/4

Holland Court Diesel

Your one stop Diesel SUPER SHOP 720-542-9104

Give us a call for the best of the best no cheap or budget imitations here just quality brand names with service you can trust all backed by nation wide warranties. Pureflow, Valair, BD power, DDP, HTT, Industrial injection, Dipricol, Quadzilla, S&B, Snow performance, Icebox, Edge, Diamond eye, MBRP, Hamilton cam and more. We install what we sell

[DIESELGUY84]

The Grid heater in our cummins engines is a dual heating element that is sandwiched between the intake horn and the cylinder head, heating the air giong into the engine. it's powered by two large relays on the driver's fender, and is ECM controlled. when the ECM reads 55 deg. F or lower at the intake air temp. sesnsor (IAT) it energizes one or both of these heating elements, depending on how cold it is.

A glow plug system works much the same way only the heating element protrudes into the combustion chamber much like a spark plug.

hope this helps, any more questions don't hesitate to ask.
Eric.

__________________
99 White QC 4X4 sport. 4in open exhaust, FASS95GPH, ADRENALINE, DDP 200hp styx, BD TWINS, ARP head studs, Truetrac rear diff. 5speed W/3850# Valair Dual Disc, Sirius, BD cooldown timer. Very special thanks to John @ www.hollandcourtsales.com 14.2@95MPH

[ynots57]

Originally Posted by DIESELGUY84

The Grid heater in our cummins engines is a dual heating element that is sandwiched between the intake horn and the cylinder head, heating the air giong into the engine. it's powered by two large relays on the driver's fender, and is ECM controlled. when the ECM reads 55 deg. F or lower at the intake air temp. sesnsor (IAT) it energizes one or both of these heating elements, depending on how cold it is.

A glow plug system works much the same way only the heating element protrudes into the combustion chamber much like a spark plug.

hope this helps, any more questions don't hesitate to ask.
Eric.

that about sums it up. my grid will stil cycle with temps in the 60's F. the grid heater will also cycle on and off even after the engine is started, hence the lights dimming and if the heater fans on high you will probably hear it slow down

__________________
2005, 4x4 QC/LB SRW, 48RE, 3:73, Aero 4040, AEM, ring mia, other goodies

[ynots57]

__________________
2005, 4x4 QC/LB SRW, 48RE, 3:73, Aero 4040, AEM, ring mia, other goodies

[lostnwalmart]

welcome and in simplest form is like a toaster in the intake and eric with a glow pulg on most engines i have a precombustion chamber so it not really like a spark plug thats also why there injectos spray with less outward pattern and more downward, god thought u were a diesel mechanic =P

__________________
2001 4x4, airdog 150, Custom nv4500, 8in cat stack, monster 2VP, custom Valair DD, adraline, custom 6 hole injectors, bigstick cam, p&p head, bd special spearco intercoola
Thanks to Dieselnut, Coaltrain, www.hollandcourtsales.com

[DIESELGUY84]

OK Clff, smart @$$.

Yes, alot of engines w/glow plugs have precombustion chambers, but not all. (95 an up 7.3l p'strokes are direct injected w/glow plugs)

__________________
99 White QC 4X4 sport. 4in open exhaust, FASS95GPH, ADRENALINE, DDP 200hp styx, BD TWINS, ARP head studs, Truetrac rear diff. 5speed W/3850# Valair Dual Disc, Sirius, BD cooldown timer. Very special thanks to John @ www.hollandcourtsales.com 14.2@95MPH

[ah64id]

On a 3rd gen the wait to start light illuminates if the ambient temp, coolant temp, and intake air temp are below 66* F. Above that number the wait to start light wont come/stay on but the grid heater still operates if other parameters, can't recall.. but its mainly coolant/intake temp related are met...

Its a much better system than glow plugs. It heats the air being used to start the truck, not the air being forced out of the engine prior to the first combustion event.

__________________

05 3500 QC LB NV5600 4X4 SRW
Pricol Boost and EGT
Amsoil everywhere, BMK-11
GDP MK-2+ w/ Cat 2 mic
Smarty Jr