4th Tubocharger on its way out

[Bob4x4]

If the crank case pressure exceeds the oil pressure the engine would be one massive oil leak

 

[TCDiesel]

If the crank case pressure exceeds the oil pressure the engine would be one massive oil leak

In Books Terms Yes, In Practical Terms No, It is Possible to blow oil out the Vent Tube if the Brake malfunctions, the PRXB has a bypass hole that may become adhere to the primary butterfly this will create excessive back pressure. This is extreme Unlikely... The man is on his 4th Charger??? We're the greatest amount of pressure Going to be, In the Crank case (Out side of the cylinders). Lack of lube is the Only reason for 3 chargers to go bad ( I can come up with). I would run the New charger with the PRXB disable for 10k.

 

[DCreed]

it does not take much pressure in the crankcase to blow oil seals out of the turbos. all it really takes is more than boost and when the brake is on there is no boost. in the case of twins the turbos boost enough to blow the seals on the primary (low boost) charger. there is a simple test by removing the oil filler cap. if the engine has positive crank pressure it will blow out of the filler cap. that brake may simply have too much holding pressure for the Cummins and need a small hole drilled in the butterfly to allow slightly more bypass.

 

[AH64ID]

The Dealer has done a Oil Pressure Test and they said that they checked the Drain. They say that there are no Problems with Oil flow.

The Pac Brake uses a air cylinder and a remote mounted electric air compressor for Brake operation and it doubles as an onboard air source for airing up tires or other things a small reservoir of compressed air would be good for. It has come in handy several times.

As for Crank Case Back Pressure that is a new theory that is worth exploring.

You said you have an exhaust back pressure gauge. What kind of back pressure do you see at idle? The OE Brake is about 20psi at idle and 30psi at fast idle.

 

[JCarlisle]

The Back Pressure at Idle is between 15 to 30 psi The guage Flutters between 15 and 30 at idle. Dodge Service manager told me today that he had the approval today to replace 1 more turbo as long as the Pac Brake is not on the engine and he would give me a price break on a Jacobs Brake and install it for me. He is also going to send the current turbo to have a failure analysis done on it.

I sure like all the features of the Pac Brake but I like the Idea of 2 more years of warranty better. So I will be having the new turbo and brake installed in a couple of weeks. I will keep you posted if there is another problem as it should show up with the new setup and it will all be under warranty.

Thanks for all of the Good Information.

 

[JCarlisle]

I just had a new Jacobs Brake Installed by the Dealer and Turbo number 5 I will be installing a pressure guage on the Brake to see what kind of back pressure it creates. I am not fond of the noisy vacuum pump and the brake sure doesn't work like the Pac Brake did. I have to use the brakes more often.

I will be towing a load through mountain Grades this weekend and will have a better feel for the Brake then.

 

[AH64ID]

I just had a new Jacobs Brake Installed by the Dealer and Turbo number 5 I will be installing a pressure guage on the Brake to see what kind of back pressure it creates. I am not fond of the noisy vacuum pump and the brake sure doesn't work like the Pac Brake did. I have to use the brakes more often.
I will be towing a load through mountain Grades this weekend and will have a better feel for the Brake then.

I like my pressure gauge on my EB. . but its all plugged up with soot right now and doesn't react very fast. . time for a cleaning.

What noise do you hear from the vacuum pump? The only noise mine makes it the air going around the butterfly valve when closed.

 

[SRadke]

A severe restriction in the in the intake will cause leakage on the compressor side.

-Scott

 

[AABEN]

Dodge has all of my failed Turbos but the one on the truck now that is starting to leak I would love to have it analized if I knew where to send it

You can call Blackstone lab 260=744-2380 have them send you there sample bottle to srnd your sample in. Ask for the TBN test also == Good luck

 

[JCarlisle]

The Vacuum Pump makes a low hissing or ticking sound that varies with acceleration and deceleration the Brake is not engaged or on I noticed the new sound when I pulled out of the Dealer Drive Where it was installed.

 

[AH64ID]

The Vacuum Pump makes a low hissing or ticking sound that varies with acceleration and deceleration the Brake is not engaged or on I noticed the new sound when I pulled out of the Dealer Drive Where it was installed.

Interesting never heard/noticed that on either mine or my dads trucks.

 

[JCarlisle]

I towed a load of Hay up to The Ranch this weekend (22,000 GVW) and used the Brake extensively I am not impressed at all with the Jake Brake the Pac Brake was a much better Brake. The Shifter Mounted Switch for the Jacobs Brake makes an annoying noise when the Truck is under Load and the Vacuum pump is still buzzing away. I will be installing a pressure Guage on the Brake this week

 

[RVTRKN]

I towed a load of Hay up to The Ranch this weekend (22,000 GVW) and used the Brake extensively I am not impressed at all with the Jake Brake the Pac Brake was a much better Brake. The Shifter Mounted Switch for the Jacobs Brake makes an annoying noise when the Truck is under Load and the Vacuum pump is still buzzing away. I will be installing a pressure Guage on the Brake this week

If your turbo problem goes away, then the Pac brake was maybe closing off the exhaust completely giving you better braking, but was causing extreme back pressure blowing out the turbo seals. If thats the case, then you might want to check out the difference with someone that has the Pac Brake without blowing up turbo's very 5K miles and see if the brake performs as good as yours. I know that the EB closes off the exhaust but maybe it was completely closing when it shouldn't. Did you ever have a certified Pac Brake technician adjust it or at the very least look at it. I'm not talking about a self proclaimed expert, but an actual Pac Brake certified tech. Even though I'm a Jacob Brake fan, (because its factory authorized) I can't imagine that Pac Brake would make any money, or lose large sums, if there EB did this to every turbo diesel.

 

[JCarlisle]

I will be sending the Brake assembly to PAC Brake this week and they are going to test the Brake. I had a Guage on the PAC and it never went above 60psi.

I will be installing a guage on the Jake as soon as I can pick up another guage the old one broke.

 

[JCarlisle]

I have about 1000 miles on the Truck since the new Jake Brake I am not to fond of it. The PRXB PAC Brake was a much stronger brake through out the rpm range. But the interesting part now is that the Turbocharger that is on the Truck now is starting to weep oil in the same place as all of the others So This proves to Dodge that the Brakes are not the issue here there is something else wrong. I talked with the Service manager today and he is calling Dodge and asking them to send out a technical expert now.

This will be turbo number 5 and the truck has 60k miles on it

 

[brods]

Here is a good article on turbo failure which includes several operator controllable conditions that lead to turbo failure as well as the mechanical issues. http://www2.zhome.com:81/ZCMnL/PICS/turboChargerBasics/turboChargerBasics.html



Another article about turbo oil leaks. Turbocharger oil leaks: Causes and Cures



Hope it gets solved this time around, keep us posted.

 

[amsoilman]

One of the reasons I use a High Quality 100% Synthetic Engine oil is the fact it will handle much more heat, therfore reducing oil coking problems in the turbo bearings.



Wayne

 

[thomasrmmr]

hi which brand and type oil filter are you using ? and weight and brand oil ?

 

[amsoilman]

hi which brand and type oil filter are you using ? and weight and brand oil ?

I use the Amsoil brand 15W-40 API CI-4+ Heavy Duty Diesel & Marine Engine oil with an Amsoil Full-Flow filter and an Amsoil By-Pass filter as well.



Wayne

 

[JCarlisle]

I was using the amsoil synthetic media filter and amsoil 15/40 Diesel and Marine running a 10k change interval and doing a sample every oil change. The Samples were always good except the copper level started to go up about the time the first turbo failed. ( I run Identical intervals and oil filter in my 2000 2500 cummins with no problems)

The Dealer started doing the oil changes at the specified intervals and other engine maintenance when the failure frequency was detected to maintain the warranty