Survey...... "oil line of death 3116" (governor oil feed line)

[Ronmar]

The issue with these teflon hoses is their bend radius. Take a plastic drinking straw and try and bend it. The thin wall teflon liner behaves a lot like this and will want to collapse. The braided sheath helps to prevent this but it has limitations to about a 2” radius...

because of the spacing between the ports, I found that with a 45 fitting pointing upwards out of the head, and a 90 at the governor port, a 9” line will scribe a circle pretty close to 2” radius...

JIC-4-Male-x-SAE-6-Male-90-Degree-Elbow

JIC-4-Male-x-SAE-6-Male-45-Degree-Elbow

Allstar Performance ALL46400-9: Braided Steel Line #4 Line - JEGS High Performance

Buy Allstar Performance ALL46400-9 at JEGS: Allstar Performance Braided Steel Line #4 Line. Guaranteed lowest price!

www.jegs.com

 

[frank8003]

You guys are doing good.
If I was to save an an engine I would not use anything but ................
No, not brake hose, no, not chinese knockoffs, No not all that other stuff that is out there.
Only get one engine, protect it.

 

[ramdough]

Is there a hose of death on the 3126? I looked and could not find one.


Sent from my iPhone using Tapatalk

 

[Ronmar]

Is there a hose of death on the 3126? I looked and could not find one.


Sent from my iPhone using Tapatalk

I don’t think it is fatal, as when it fails you loose HEUI pressure pretty quickly and the engine quits running

 

[Crazyls2]

3116 Engine year 1998
. Engine serial number. 7AG08024
. approx. position of the union (photo below) on the block
. has yours broke. Yes, dumped 5 gallons of oil on highway.
. is yours leaky presently

Driving back from Texas I noticed a significant amount of smoke so I pulled off at the next exit. The oil pressure dropped almost all the way down so I shifted to neutral and shut down the engine. Mechanic identified the broken line. Cat had the part for less than $60.00

 

[Mullaney]

3116 Engine year 1998
. Engine serial number. 7AG08024
. approx. position of the union (photo below) on the block
. has yours broke. Yes, dumped 5 gallons of oil on highway.
. is yours leaky presently

Driving back from Texas I noticed a significant amount of smoke so I pulled off at the next exit. The oil pressure dropped almost all the way down so I shifted to neutral and shut down the engine. Mechanic identified the broken line. Cat had the part for less than $60.00

.
Good for you!

Amazing how a good driver (not a steering wheel holder) can look out the mirror regularly and see something going wrong before everything goes straight to "heck". No texting and driving, no jamming out on the radio to drown out the motor noises! You definitely did good! Saved yourself a bucket full of money too!

 

[Ronmar]

3116 Engine year 1998
. Engine serial number. 7AG08024
. approx. position of the union (photo below) on the block
. has yours broke. Yes, dumped 5 gallons of oil on highway.
. is yours leaky presently

Driving back from Texas I noticed a significant amount of smoke so I pulled off at the next exit. The oil pressure dropped almost all the way down so I shifted to neutral and shut down the engine. Mechanic identified the broken line. Cat had the part for less than $60.00

Cool, keep an eye out for it though, we had one guy break one, replaced it with the cat part and turned right around and had that one fail not too long after. it is an overhung part without support and will tend to oscillate if any vibration is put into it… like a diving board…

 

[frank8003]

"Survey...... "oil line of death 3116" (governor oil feed line)"


I been watching the loss of entire engine, really quick, of this story, for a long time.
Really bad stories.

My comments were to just use Swagelok fittings and hoses but never got a comment.
Swagelok is power plant proven, helicopter and tank proven and does not fail.

This would be at the very top of my list if I were running one of these motors with this
known fault.

In any case I study race cars, all flavors, and they are nothing if not the highest vibration
and beat things out there. Maybe, a city bus, or the trash trucks around here but they
don't get the metal fatigue failures. They are heavy freakin duty trucks and busses.
Race cars all flavors need to have everything lightest and the very best.

In any case, if others want to see a minor collection of hoses and fittins available to all
then look at the pictures.

 

[Awesomeness]

My comments were to just use Swagelok fittings and hoses but never got a comment.
Swagelok is power plant proven, helicopter and tank proven and does not fail.

This would be at the very top of my list if I were running one of these motors with this
known fault.

The problem with a flexible line isn't the likelihood of the connector failing, it's that flexible lines don't flow as well as a solid line so you have to oversize it. People usually don't know that, or forget to consider it.

For a mass-production application, the hard line is an appropriate choice. It's the best flowing, longest lasting, and cheapest solution. If you're making a one-off, it just might not be as cheap, because you'll spend time and money bending the line.

I still argue that this isn't really a "known fault". Many of my 25 year old flexible lines (e.g. air, fuel) are failing too. I haven't had my oil line fail, but I did have the big transmission cooler hard line crack (likely as part of the driveline vibration that wrecked other stuff on my truck). If you are worried about this oil line, I recommend just replacing it with a fresh hard line from CAT.

 

[frank8003]

The problem with a flexible line isn't the likelihood of the connector failing, it's that flexible lines don't flow as well as a solid line so you have to oversize it. People usually don't know that, or forget to consider it.

For a mass-production application, the hard line is an appropriate choice. It's the best flowing, longest lasting, and cheapest solution. If you're making a one-off, it just might not be as cheap, because you'll spend time and money bending the line.

I still argue that this isn't really a "known fault". Many of my 25 year old flexible lines (e.g. air, fuel) are failing too. I haven't had my oil line fail, but I did have the big transmission cooler hard line crack (likely as part of the driveline vibration that wrecked other stuff on my truck). If you are worried about this oil line,

I recommend just replacing it with a fresh hard line from CAT.

see post #87

 

[Awesomeness]

see post #87

If you haven't fixed your other problems, of course you're going to continue to break stuff. Had he not broke the oil line again, he would have cracked the front aluminum housing next.

 

[Ohiobenz]

The problem with a flexible line isn't the likelihood of the connector failing, it's that flexible lines don't flow as well as a solid line so you have to oversize it. People usually don't know that, or forget to consider it.

For a mass-production application, the hard line is an appropriate choice. It's the best flowing, longest lasting, and cheapest solution. If you're making a one-off, it just might not be as cheap, because you'll spend time and money bending the line.

I still argue that this isn't really a "known fault". Many of my 25 year old flexible lines (e.g. air, fuel) are failing too. I haven't had my oil line fail, but I did have the big transmission cooler hard line crack (likely as part of the driveline vibration that wrecked other stuff on my truck). If you are worried about this oil line, I recommend just replacing it with a fresh hard line from CAT.

No oil line will flow more than the smallest internal diameter of any associated fitting....

 

[Awesomeness]

No oil line will flow more than the smallest internal diameter of any associated fitting....

While that is true, they can flow less. Soft lines flow significantly less, even when straight and round, but then are generally bent. This leads them to be deformed and even more restrictive than hard lines also. This is why all the military soft lines are oversized for the fitting (e.g. 1" fitting with 1.125" soft line on it).

The military fittings that use the oversized line are uncommon/expensive, or you have to pay/do more to drill them out yourself.

The replacement hard line is the least expensive and best option.

 

[frank8003]

Hey, whatever one does use...............

Is there a way to shut OFF the motor when this line looses pressure?

That would be scrumptious.

Maybe just a tee with a pressure switch?

save and engine

 

[Third From Texas]

Easier and cheaper to just slap a flex hose on there.

I mean *could* create a way to shut your engine off if the pressure fails for *any* reason. A simple dummy light/audio alarm connected to a pressure sensor and a way to kill the engine when it trips.

IMO, you're more likely to have your compressor bracket rip off and puke your oil than you are the 'line of death" but ymmv...

 

[Mullaney]

Easier and cheaper to just slap a flex hose on there.

I mean *could* create a way to shut your engine off if the pressure fails for *any* reason. A simple dummy light/audio alarm connected to a pressure sensor and a way to kill the engine when it trips.

IMO, you're more likely to have your compressor bracket rip off and puke your oil than you are the 'line of death" but ymmv...

.
At one point in time, MOROSO components was the top of the line when it came to oil in a pan - or a lack of oil. Just looked a few minutes ago @ Summit Racing. They sell their line and I found a low pressure switch. Looks like an electric oil sending unit. The one I perused had 3 wire connectors on the back. Wiring diagram is included. 15# low oil shutoff. Cost about $50 bucks. Quick web search found more and less expensive and even pressure adjustable.

In days gone by, I remember that diesels installed in the M4's in our fleet had a button that had to be pushed to override low pressure to start the motor. Once it started running, low oil would kill fuel for immediate shutdown. That was a feature on digger derricks too. The idea was to protect the expensive parts.

Could be a cheap way to protect your CAT or anything else that needs oil...

 

[Awesomeness]

.
At one point in time, MOROSO components was the top of the line when it came to oil in a pan - or a lack of oil. Just looked a few minutes ago @ Summit Racing. They sell their line and I found a low pressure switch. Looks like an electric oil sending unit. The one I perused had 3 wire connectors on the back. Wiring diagram is included. 15# low oil shutoff. Cost about $50 bucks. Quick web search found more and less expensive and even pressure adjustable.

In days gone by, I remember that diesels installed in the M4's in our fleet had a button that had to be pushed to override low pressure to start the motor. Once it started running, low oil would kill fuel for immediate shutdown. That was a feature on digger derricks too. The idea was to protect the expensive parts.

Could be a cheap way to protect your CAT or anything else that needs oil...

There is already an oil pressure switch on the engine.

 

[Mullaney]

There is already an oil pressure switch on the engine.

.
Okay, so why are people losing engines to a catastrophic loss of oil?
Pressure switch, OFF and Done is how it works in fast cars...

 

[Awesomeness]

.
Okay, so why are people losing engines to a catastrophic loss of oil?
Pressure switch, OFF and Done is how it works in fast cars...

I don't think it controls anything like that now. I believe it just signals the alternator when the engine has made pressure and the alternator can start charging. But if you wanted it to shut down, you could tap off it.

 

[coachgeo]

I don't think it controls anything like that now. I believe it just signals the alternator when the engine has made pressure and the alternator can start charging. But if you wanted it to shut down, you could tap off it.

from previous discussions..... based on location of the oil pressure switch...... by the time that switch reads low oil pressure..... your engine is already toast. Oil line of death just pumps the oil out way to fast.

Issue also is....... automatic shut off...... while saves your engine..... it likely kills person(s) on the highway behind you as your truck suddenly out of the blue in the middle lane loses all power, resulting in cars, trucks behind you eating your ass in a pile up. Driver of FMTV does not want to brake (so no brake lights show), they want/need power to safely steer it off the road but can't cause engine was auto shut down.... that is a lose lose situation.

So comes down too.... save your engine vs pile up accidents behind you that kills one or more.