Grid Heaters

hwcurtice · Jun 6, 2007

crash said:
Pretty close to changing a spark plug :awesomework: But usually harder to get to..

Oh Mr. Mechanic. Now yer gonna have to show me. Although, I think on a CTD, it is a bit easier than on a V-8.

crash2 · Jun 6, 2007

hwcurtice said:
Oh Mr. Mechanic. Now yer gonna have to show me. Although, I think on a CTD, it is a bit easier than on a V-8.

You don't have them :awesomework:

hwcurtice · Jun 6, 2007

crash said:
You don't have them :awesomework:

My diesel engine doesn't have glowplugs? I thought all diesels had glow plugs?
How the heck does it spark the fuel then?
Lesson 101 on CTD Diesel Mechanics coming up.
:corn: :beer: :corn: :beer: :corn: :beer:

skrause · Jun 6, 2007

hwcurtice said:
My diesel engine doesn't have glowplugs? I thought all diesels had glow plugs?
How the heck does it spark the fuel then?
Lesson 101 on CTD Diesel Mechanics coming up.
:corn: :beer: :corn: :beer: :corn: :beer:

Diesel engines don't spark anything, they are spotaneous combustion realized.

The glow plugs and heater grids are there to heat the incoming fuel/air charge so that it will be able to ignite when compressed, cold charge = no bang.

hwcurtice · Jun 6, 2007

skrause said:
Diesel engines don't spark anything, they are spotaneous combustion realized. The glow plugs and heater grids are there to heat the incoming fuel/air charge so that it will be able to ignite when compressed, cold charge = no bang.

So what you're saying is, my CTD has heater grids, instead of glow plugs? And they work based on compression, to ignite the fuel. Are the heater grids 'hot' all the time, or only when the piston is TDC on the ignition cycle?

skrause · Jun 6, 2007

hwcurtice said:
So what you're saying is, my CTD has heater grids, instead of glow plugs? And they work based on compression, to ignite the fuel. Are the heater grids 'hot' all the time, or only when the piston is TDC on the ignition cycle?

Read, absorb, learn. :corn:

Compressing any gas raises its temperature, the method by which fuel is ignited in diesel engines. Air is drawn into the cylinders and is compressed by the pistons at compression ratios as high as 25:1, much higher than used for spark-ignite engines. Near the end of the compression stroke, diesel fuel is injected into the combustion chamber through an injector (or atomizer). The fuel ignites from contact with the air that, due to compression, has been heated to a temperature of about 700

82toyomud · Jun 6, 2007

hwcurtice said:
So what you're saying is, my CTD has heater grids, instead of glow plugs? And they work based on compression, to ignite the fuel. Are the heater grids 'hot' all the time, or only when the piston is TDC on the ignition cycle?

The heater grids are only on during initial start-up or when the intake air temps are "low" enough. If you ever start up your truck when its cold out, and your sitting in it, you'll see all the interior lights dim, that's heater grids kicking on:masturbanana[1]:

Lucky Jeff · Jun 6, 2007

first gens are a lot worse since they only have one battery to pull from. You can watch my volt gauge and it won't budge with the grid heaters. But it'll drop quite a bit on a first gen.

I told my brother to find the spark plugs on a cummins one time.. Man did that take a while..

hwcurtice · Jun 7, 2007

Lucky Jeff said:
first gens are a lot worse since they only have one battery to pull from. You can watch my volt gauge and it won't budge with the grid heaters. But it'll drop quite a bit on a first gen.

I told my brother to find the spark plugs on a cummins one time.. Man did that take a while..

LOL. Did you see the battery Karl (Not KarlVP) put in the truck? That thing is HUGE!

Anyway, do the Grid heaters ever burn out?

Jay W · Jun 8, 2007

Lucky Jeff said:
first gens are a lot worse since they only have one battery to pull from. You can watch my volt gauge and it won't budge with the grid heaters. But it'll drop quite a bit on a first gen.

That's what I was expecting when went from a 1st to 3rd gen, but the new truck acts very similar at cold startups. Lights dim etc.