I was lookin through a thread on how to keep egts down and i came across this site http://www.dieselinjection.net/BRUCE...eginning.html, i was wondering if someone could hook me up w/ an article like that for Caterpillar engines(3406ABCD).

 

The same rules apply to all diesel engines concerning keeping EGTs down and proper driving habits.

This was taken from my article in the tech facts section.

Higher exhaust temperatures are the result of these basic causes:
1. Excessive fueling which is usually caused by a heavy foot or a faulty fuel system. Electronic engines can have problems, which show up first on the pyro. Note: The overfueling temperature increase is five degrees per pound of excess fuel burned.
2. A high intake ambient air temperature. Note: For every on degree increase in the external temperature there is a three-degree increase in exhaust temperature.
3. Restricted air caused by: 1) Dirty air cleaners (intake air restriction). For every ten inches vacuum there is a thirty-degree increase in exhaust temperature. 2) High altitude. Note: There is a twenty five-degree increase per 1,000 foot increase in altitude.
4. Headwinds/wind resistance
5. Lugging the engine, caused by improper throttle use or shifting.

Excessive heat is one enemy of the turbocharger. The maximum input temperature of a turbocharger is approximately 1,400*F. Temperatures above this will deteriorate the turbo housings, crack them and foul the compressor wheels. Intake and exhaust manifolds as well as cylinders will crack.

Excessive Fueling will cause overspeeding or excessive revs resulting in high fuel consumption. Wasteful overspeeding and excessive heat damage the engine and turbo. Overspeeding will result in pistons striking and breaking valves. Prints of valves on the piston heads is an indication that the engine has been over revved. Injectors may stick as a result of overspeeding when a vehicle is going down grade and pushes the engine above governed speed. The governor shuts of all fuel to the injectors and deprives them of lubrication. Most diesels are protected against overspeeding by governors, which should be correctly adjusted. Increasing the RPM's by changing the governor or allowing a vehicle to push the engine beyond its rated RPM will lead to engine damage.

Incomplete Fueling can also cause many problems. It is usually caused by restricted air supply. It results in a loss of horsepower and fuel is wasted. The unburned fuel will wash the lubricating oil off of the cylinder walls. This can cause seized, burned or scored pistons and rings. Unburned fuel may also dilute and contaminate the lubricating oil. The injector cup spray holes may become carboned resulting in faulty injectors, which help to create an even more unreliable fuel/air mixture.

Another situation to watch is when a hill is being crested. The engine must be cooled by shifting down and backing out of the throttle because the engine will cool down fast. It is not good to let an engine cool down too much at the bottom of the hill before starting up again. When the engine is not being operated in the most efficient range, fuel is being wasted and engine damage will occur if the proper procedure is not followed.

 

I'm sorry. Just couldn't resist. Everything you wanted to know about Caterpillars!

 

My girlfriend likes the knobbly ones..... oops wrong topic

 

What's a 3406D? That's a new one on me.

 

Was the "D" for the 450??

3406A 350HP
3406B 400HP
3406C 425??
3406D 450??

Then it was electronic and up to 15L I think..

You can go to CAT.com to get some specs.

J-eh

 

3406A and B are old old 3 series. 3406E would be the newer HEUI style cats. Mostly before the metric motors. (C- series)

The engine codes read like

3116E =

3 Series

1.1 liter per cyl displacement

6 cyls

Electronic

3208 would be a 3 series, 2.0 LPC, V8

 

doesn't always work with that code...

punch that codeing in for the 3406, and you'd have a 24 liter engine, when it actually is in the range of 12-13 liter

 

Come on man!!!! I had high hopes of learning about some CATERPILLAR powerplants! That was wrong. -Jake

 

sorry about the abcd thing my dad told me to see if i could get info on cats i dont know much about them my self he drives a truck

 

but thanks for the info.


PS i can take critisism as a positive thing

 

We have a 3612 at work, Schweeet. 4800 HP.

 

superduty ;;; 3406e is NOT a huei engine. the only 3400 series that are huei are the 3408 and 3412. otherwise the 3126, 3126b, 3126e and c-7, are the huei engines. as far as the 3406d- there is not one.

 

You are right on this engine. The 3116s were also built with mechanical fuel injection systems.

Not true. That would make it a 16L engine. It has a 636CID Roughly 10.3L. A 3306 (I-6) has a 638CID.

A 3406 is 14.6L, almost 900CID.

 

Aren't the first two numbers the engine series, and the last two the # of cylinders?

3406 - What ever the 34 means in the series, 6 cylinder
3408 - " " " , 8 cylinder
3412 - " " ", 12 Cyl

BUT, the 3116's were 7.2L weren't they? Like 442 ci?

That how I think it works, anyway.
Chris