ERG cooler info

[selby68]

I’m new to this site and to forums so please excuse any mistakes. I have a ’04 Excursion 6.0PSD (my first diesel) I am making a few mods such as a diesel power package consisting of an MBRP 4" 409SS Turbo Back, an Custom Programmed SCT X3 and a BD outlook monitor. (Left the intake stock) Later date I’d like to hook up and run LP as I tow a 30’ travel trailer. I read somewhere that a simple block-off plate that fits inside the exhaust up-pipe eliminates the heat-flashing of the coolant by stopping exhaust flow from entering the EGR cooler. 1.) What exactly is “heat-flashing” 2.) What are the advantages and disadvantages of blocking/disabling the exhaust flow.

[Evil Eye]

Heat flashing is when your exhaust causes the coolant in your EGR cooler to boil and pukes out your degas (coolant reservoir) bottle. It's fairly common on tuned 6.0L's. The block off plate should eliminate 90% of the problems with the EGR cooler and since you don't have the scoop in your up-pipe, you only need a block off plate or a freeze plug.

Advantages-no coolant puking; won't have to worry about blowing up your EGR cooler and won't have to worry about leaking coolant into your heads possibly hydro locking your engine

Disadvantages - None that I can think of, cost and/or labor to install it maybe.

[mschn99]

i totally agree with Shawn...except for one point...

the disadvantages are this. If you dont have an SCT that has custom tunes....the engine will be looking for EGR flow when there is none and it will set a check engine light.......probably a P0401......other than that....i totally agree with shawn...

[Evil Eye]

Good point, Marc. I forgot about turning the EGR off with the SCT.

[20046.0PSDX]

One thing to add. Repeated heat flashing can cause the silver solder in the EGR cooler to rupture causing catastrophic failure of the EGR cooler (coolant entering the "air" side) which will then send coolant into your EGR valve and on into the intake manifold and on out to poach your VGT. Signs of this include the loss of power, temp guage shooting to the moon, and it will look like someone is pulling a white linen sheet out of your exhaust tip.

Cure the problem while its just puking a little and it'll save you much heartache (and money).

Amp

[720Deere]

Originally Posted by 20046.0PSDX

Signs of this include the loss of power, temp guage shooting to the moon, and it will look like someone is pulling a white linen sheet out of your exhaust tip.

Cure the problem while its just puking a little and it'll save you much heartache (and money).

Amp

I think I remember seeing this happen once to an Excursion! Do you still have your EGR cooler in place or did it go bye-bye?

[20046.0PSDX]

I think I remember seeing this happen once to an Excursion! Do you still have your EGR cooler in place or did it go bye-bye?

Actually, what you witnessed at SSS was a Hypermax wire-ring gasket failure on cylinder #5. Pushed it through the water jacket! That was what had us perplexed. The EGR wasn't connected at the up-pipe anymore and we thought that maybe the high boost in combination w/ me tuning it back to stock a couple of times had caused the EGR to stick open allowing heat/boost to get in from that side??? Couldn't figure it out until tear-down. Just didn't think the wire-ring would fail...oh well, needless to say I won't be going back w/ those.

The EGR totally popped about 20 miles from Myrtle Beach (on the way, fully loaded for a week of vacation) in July/August of 2006. I was running a SuperChips 1704 tuner at the time and naturally forgot to bring it w/ me...my first experience of NO warranty!

Amp