Ecodiesel power derating as temps rise?

[Samfamaz]

Under normal driving I'm seeing oil temp around 220. Towing flat in the AZ heat i was seeing 235ish. Towing up grade I was 250+ and derating. So I'm hoping that a 220 sensor (I really wanted a 230 to keep from short cycling the fan) on the return side will kick the fan on early enough to cut off the temps getting high. Plus with bypassing the coolant at the heat exchanger and making the radiator solely responsible for coolant will keep from going over 250. Samfamaz said he was seeing about a 10* drop and that's without bypassing the coolant.

I said I was seeing 10 at normal driving conditions. I see more of a reduction when my temps are under load. The highest I've seen since the cooler was 240 and I was trying to get it hot pulling my trailer. I've yet to pull my trailer up a step grade with the cooler. All this is in AZ with outside temps over 100.

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[Samfamaz]

I said I was seeing 10 at normal driving conditions. I see more of a reduction when my temps are under load. The highest I've seen since the cooler was 240 and I was trying to get it hot pulling my trailer. I've yet to pull my trailer up a step grade with the cooler. All this is in AZ with outside temps over 100.

I've considered pinching off the coolant line without bypassing it just to see what all the temps do. I'm not ready to bypass the factory cooler. To me that just screams voided warranty.

 

[pmpmstrb]

Just received an email that the oil filter housing has shipped. USPS says I'll have it Monday.

 

[pmpmstrb]

Got the oil filter housing today. Short version is that things look great. Best we can deduce is that the middle port on the right side is the feed from the engine into the housing. From there it goes thru the filter and to the oblong port on the left. It splits in that port and goes back into the engine and into the heat exchanger. After the exchanger the oil enters back into the engine thru the bottom right port. We're pretty sure that black circle is a tstat for the oil to allow the oil to get to temp. The top right port is for the oil to drain out of the filter cup when you remove the filter. We believe the sensor that came with the housing is the temp sensor and it's installed in the oil flow coming from the engine before it enters the filter and the exchanger. So when you're under the Jeep the rear port would be the feed and the front port would be the return. I don't see any benefit to making a block off plate like the 2nd gen had. Plus it would be an absolute PITA to get all the bolts out to install it. The coolant does not pass into the engine like the 2nd gen, it just goes in and out of the exchanger.

 

[Samfamaz]

So it looks like the two plugs on the bottom go to the same place as the in and out for the oil filter?

 

[Rusty PW]

Question. Is the temp sensor before or after the heat exchanger?

If the black do hicky is a tstat. Wonder what the temp setting is?

So......we can use the 2 plugs on the bottom to plum in the cooler without issues. And they are 18mm. And this has been verified.

 

[pmpmstrb]

Question. Is the temp sensor before or after the heat exchanger?

If the black do hicky is a tstat. Wonder what the temp setting is?

So......we can use the 2 plugs on the bottom to plum in the cooler without issues. And they are 18mm. And this has been verified.

If the oil travels how we think then the sensor is before the filter and before the exchanger. So basically it reads the hottest oil possible. I believe the plugs are 22mm not 18. Haven't gotten that far yet, but yes it appears using the plugs does the exact same thing as the NOECO delete plate did for the 2nd gen motors.

 

[pmpmstrb]

So it looks like the two plugs on the bottom go to the same place as the in and out for the oil filter?

Not exactly. The filter supplies the engine and the exchanger and the exchanger has its own return port.

 

[@californiajeeping]

Got the oil filter housing today. Short version is that things look great. Best we can deduce is that the middle port on the right side is the feed from the engine into the housing. From there it goes thru the filter and to the oblong port on the left. It splits in that port and goes back into the engine and into the heat exchanger. After the exchanger the oil enters back into the engine thru the bottom right port. We're pretty sure that black circle is a tstat for the oil to allow the oil to get to temp. The top right port is for the oil to drain out of the filter cup when you remove the filter. We believe the sensor that came with the housing is the temp sensor and it's installed in the oil flow coming from the engine before it enters the filter and the exchanger. So when you're under the Jeep the rear port would be the feed and the front port would be the return. I don't see any benefit to making a block off plate like the 2nd gen had. Plus it would be an absolute PITA to get all the bolts out to install it. The coolant does not pass into the engine like the 2nd gen, it just goes in and out of the exchanger.

Ok maybe someone with engineering/fluid dynamics exp can help me here. If you use the ports to run to a cooler in paralell with the current exchanger.... Do we get a x volume flow through our cooler? Or does oil not push through the additional resistance and continues to flow through the factory exchanger?

It is full flow and return so there should be no major issues with that. But only X will flow through the new cooler and the rest is still being heated/cooled by the coolant run heat exchanger.

Any ideas how that will work?

 

[Rusty PW]

Ok maybe someone with engineering/fluid dynamics exp can help me here. If you use the ports to run to a cooler in paralell with the current exchanger.... Do we get a x volume flow through our cooler? Or does oil not push through the additional resistance and continues to flow through the factory exchanger?

It is full flow and return so there should be no major issues with that. But only X will flow through the new cooler and the rest is still being heated/cooled by the coolant run heat exchanger.

Any ideas how that will work?

Looking at this picture. You have the 2 plugs and the heat exchanger passages. Oil will take the path of least resistance. Think most of it will flow out of the plugs. And you will still get flow through the heat exchanger. The percentages, I don't know. For full flow through the plugs. You would need a block off plate.

 

[pmpmstrb]

Looking at this picture. You have the 2 plugs and the heat exchanger passages. Oil will take the path of least resistance. Think most of it will flow out of the plugs. And you will still get flow through the heat exchanger. The percentages, I don't know. For full flow through the plugs. You would need a block off plate.

I agree with you. With the positive results that @Samfamaz has seen I don't think the benefits outweigh the work involved with removing and blocking off the exchanger. You would have to remove the AC compressor to get to one of the bolts and I haven't even looked to see what has to be done to remove the AC compressor. That being said I will still be taking measurements for a block off plate just in case it does come to that, but I don't think it will.

 

[Samfamaz]

Just add an oil pump to the external cooler if you want/need more flow.

 

[Glad_he_ate]

When I get time I’m going to build a closed loop cooling system for the pan. Oil out of pan through pump through spin on filter through cooler return to pan. Seems easy enough. Pans easy to remove. Drill a couple holes for pickup and return braze in some bulkheads run some lines.. just need to find the time

 

[pmpmstrb]

I put in an oil cooler to help with temps. I would say I get an average 10ish degree drop. I just used the bungs that are already on the motor next to the factory oil cooler. I didn't use a pump but I've considered it. I think the bigger problem is EGTs.
Didn't get a lot of pictures. Will try to get some next time I'm under there

Do you have an aftermarket filter back exhaust?

 

[Samfamaz]

Do you have an aftermarket filter back exhaust?

No, just a muffler delete for more room underneath and a tip that is tucked up high and clear from smashing.

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