"indicated overheating"

JL Rockies · **Posted:** Thu May 21, 2009 2:56 am

I am installing one of those coolers with the fan built in. The primary location will be behind the passenger headlight where the OEM intake tube used to be. If I cant get 'er in there (pretty sure I can), I plan to place it just above the belly skid of my ARB bumper. It will get good airflow there too but I would have to place it horizontally. The cooler I want will not fit in the traditional location due to the fan.

0311_DoC · **Posted:** Thu May 21, 2009 3:20 am

JL Rockies wrote:

I am installing one of those coolers with the fan built in. The primary location will be behind the passenger headlight where the OEM intake tube used to be. If I cant get 'er in there (pretty sure I can), I plan to place it just above the belly skid of my ARB bumper. It will get good airflow there too but I would have to place it horizontally. The cooler I want will not fit in the traditional location due to the fan.

Take pics and give us some part numbers.......

linewarbr · **Posted:** Thu May 21, 2009 8:55 am

CRDMiller wrote:

linewarbr asks about 'additional cooling load due to fcv removal and egr plate' I dont know how i could experience anything but reduced thermal load, because there is no egr to be cooled, there is no heat injection in to the cooling system at that point. The fcv simply can no longer divert (choke fresh air) in hopes that egr will flow in (it's blocked). Am i missing something?

I was talking about the coolant flow into/ out of the EGR valve assembly as noted in the link. When you installed the plate, did you remove the EGR completely, or just block it from flowing into the intake? If you removed the valve completely, how did you re-route the cooling lines on the valve? If you left the valve in, could this be a source of heat soak into your cooling system when the engine is under load?

I never realized that our EGR valve had coolant inflow/ outflow until I happened across that link. Since you are one of the only ones on the forum I've noticed that has installed an EGR block plate rather than just doing the ORM or SEGR, it came to mind as a possibility.

I am no guru as far as it goes, it was only an idea. The highest elevation in Louisiana is about 535 feet, so driving on grades is not a part of my normal driving experience. . .

loric · **Joined:** Tue Jun 03, 2008 10:17 pm **Posts:** 44

gmctd wrote:

Put an SGII on it, monitor the actual ECT as the ECM sees it, compare that to the Temp Guage indication - that can be done in PARK, sitting still

As I understand it though, the SGII will read the temp signal that's outputted from the BCM (to the instrument cluster). If the calibration is wrong, the SGII will show what the instrument panel gauge says.

I know for a fact that prior to the TSB, the red zone on the gauge read say 101C, and after the TSB that same temp on the SGII would only show as 3/4 on the gauge.

Or have i misunderstood your intention?

For the prior Q, measure the air temp directly in front of the viscous hub. I.e. between the fan and the intercooler.
My shroud came ready to go with a 5mm hole right in the top in the middle. Just be sure the thermocouple probe doesn't hit the fan!

I've noticed a def. increase in airflow with the new hub... i reckon that could be your prob. Check out KeighJeigh's posts about his temp probs.

UFO · **Posted:** Thu May 21, 2009 10:56 am

That's exactly how my CRD behaves. I have no idea whether I've have the gauge "update", but SEGR or not makes no difference. But turning off the OD will bring the temps down, presumably by reducing the boost level.

tjkj2002 · **Posted:** Thu May 21, 2009 2:00 pm

Right from the FSM on the temp gauge,if your gauge is reading correctly you have other issues.

Quote:

² Engine Temperature Normal Message - Each
time the cluster receives a message from the PCM
indicating the engine coolant temperature is within
the normal operating range [up to about 124° C (255°
F) for gasoline engines, or about 110° C (230° F) for
diesel engines], the gauge needle is moved to the
actual relative temperature position on the gauge
scale.
² Engine Temperature High Message - Each
time the cluster receives a message from the PCM
indicating the engine coolant temperature is high
[above about 127° C (260° F) for gasoline engines, or
112° C (233° F) for diesel engines], the gauge needle
is moved into the center of the red warning zone on
the gauge scale.
² Engine Temperature Critical Message -
Each time the cluster receives a message from the
PCM indicating the engine coolant temperature is
critical [above about 132° C (269° F) for gasoline
engines, or 115° C (239° F) for diesel engines], the
gauge needle is moved to the high end of the red
warning zone on the gauge scale.

UFO · **Posted:** Thu May 21, 2009 2:51 pm

linewarbr wrote:

CRDMiller wrote:

linewarbr asks about 'additional cooling load due to fcv removal and egr plate' I dont know how i could experience anything but reduced thermal load, because there is no egr to be cooled, there is no heat injection in to the cooling system at that point. The fcv simply can no longer divert (choke fresh air) in hopes that egr will flow in (it's blocked). Am i missing something?

I was talking about the coolant flow into/ out of the EGR valve assembly as noted in the link. When you installed the plate, did you remove the EGR completely, or just block it from flowing into the intake? If you removed the valve completely, how did you re-route the cooling lines on the valve? If you left the valve in, could this be a source of heat soak into your cooling system when the engine is under load?

I never realized that our EGR valve had coolant inflow/ outflow until I happened across that link. Since you are one of the only ones on the forum I've noticed that has installed an EGR block plate rather than just doing the ORM or SEGR, it came to mind as a possibility.

I am no guru as far as it goes, it was only an idea. The highest elevation in Louisiana is about 535 feet, so driving on grades is not a part of my normal driving experience. . .

If there is no EGR flow, it doesn't matter whether there is a plate or not, you will not have a heat exchange. Only if you enable the EGR will you get exhaust heating the coolant.

"indicated overheating"

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