Inline Thermostat mod
#1
Inline Thermostat mod
Engine temps got too high when towing a small trailer last week. It was only a 5x8 enclosed and well under the max tow weight. Speed was kept around 65 on the highway and at 0 miles into the trip and my highest reading was 205. Too high for me so we turned back and redid our load plan.
I am thinking of going to the inline thermostat mod and run a conventional 160 degree thermostat and retry What I'm looking for in this thread is a comprehensive bill of materials for doing the mod. I've read a bunch of threads and seen several pictures but there really hasn't been a step by step using which part.
For the housing I'm looking at using either the Jegs Housing (p/n 53260)or the Meziere Inline housing (p/n WN0072) . What I am missing are good part numbers for the hoses and the routing of the hoses down below where the old T/S will be removed.
I know most all are custom builds so I'm sure there'll be some trial and error. I just don't want to waste money buying an cutting hoses that don't fit
I am thinking of going to the inline thermostat mod and run a conventional 160 degree thermostat and retry What I'm looking for in this thread is a comprehensive bill of materials for doing the mod. I've read a bunch of threads and seen several pictures but there really hasn't been a step by step using which part.
For the housing I'm looking at using either the Jegs Housing (p/n 53260)or the Meziere Inline housing (p/n WN0072) . What I am missing are good part numbers for the hoses and the routing of the hoses down below where the old T/S will be removed.
I know most all are custom builds so I'm sure there'll be some trial and error. I just don't want to waste money buying an cutting hoses that don't fit
#2
For the top you can use the stock hose and just cut an inch and a half section out so you can fit the thermostat housing. Closer to the engine is better.
I would recommend a new radiator at the same time if yours has not been replaced.
I would recommend against a 160 thermostat. I would not go lower than a 180. The ECU will constantly be making the engine run rich at 160 because it will think it is still during the warm up cycle. A 160 thermostat will also not bring down your peak temp any more than a 180 will.
I have used both the Mez housing and the Keys housing. I like the look of the Mez housing, but I like using the Jegs housing better. I'd go Jegs.
Here is a link to the cooling system I did. Unfortunately it is very difficult to retain AC with this method. I removed it on all three I have done. You would, again, be best served with a new factory rad if you want to retain your AC. Most do. What you can gain from this is the lower hose routing. You will need a hose that I listed and an aluminum tee.
https://landroverforums.com/forum/discovery-ii-18/ultimate-cooling-system%3B-complete-system-upgrade-87611/
I would recommend a new radiator at the same time if yours has not been replaced.
I would recommend against a 160 thermostat. I would not go lower than a 180. The ECU will constantly be making the engine run rich at 160 because it will think it is still during the warm up cycle. A 160 thermostat will also not bring down your peak temp any more than a 180 will.
I have used both the Mez housing and the Keys housing. I like the look of the Mez housing, but I like using the Jegs housing better. I'd go Jegs.
Here is a link to the cooling system I did. Unfortunately it is very difficult to retain AC with this method. I removed it on all three I have done. You would, again, be best served with a new factory rad if you want to retain your AC. Most do. What you can gain from this is the lower hose routing. You will need a hose that I listed and an aluminum tee.
https://landroverforums.com/forum/discovery-ii-18/ultimate-cooling-system%3B-complete-system-upgrade-87611/
#6
Kit uses all factory hoses, so nothing custom. You can use any thermostat you want, 99-02 will throw a code if you use one less than 170, 03-04 with throw a code if you use less than 180. Send me your email and I can send you complete instructions in a PDF. Even if you don't use my kit, I still highly recommend the inline thermostat mod.
The following 5 users liked this post by Extinct:
CollieRover (07-12-2020),
hajamac (05-28-2021),
jastutte (07-13-2020),
mollusc (07-13-2020),
oilrag (01-19-2021)
#7
I currently have excellent temps with the OE 180 thermostat, but I can see how the inline would flow better and makes it way easier if you have a need to replace a thermostat in a pinch.
@Extinct , does the inline mod drop temps significantly over the OEM 180 if everything else is working properly in the cooling system? From what I have read it seems like the coolant is able to flow better with the inline mod. Also you can use an off the shelf thermostat. Are there any other benefits I am missing?
Max temp I ever see is 197, runs 185-194 99% of the time. I am not interested in a kit right now, but when I eventually need to service the cooling system again I would like to more heavily consider the inline modification.
@Extinct , does the inline mod drop temps significantly over the OEM 180 if everything else is working properly in the cooling system? From what I have read it seems like the coolant is able to flow better with the inline mod. Also you can use an off the shelf thermostat. Are there any other benefits I am missing?
Max temp I ever see is 197, runs 185-194 99% of the time. I am not interested in a kit right now, but when I eventually need to service the cooling system again I would like to more heavily consider the inline modification.
#8
I currently have excellent temps with the OE 180 thermostat, but I can see how the inline would flow better and makes it way easier if you have a need to replace a thermostat in a pinch.
@Extinct , does the inline mod drop temps significantly over the OEM 180 if everything else is working properly in the cooling system? From what I have read it seems like the coolant is able to flow better with the inline mod. Also you can use an off the shelf thermostat. Are there any other benefits I am missing?
Max temp I ever see is 197, runs 185-194 99% of the time. I am not interested in a kit right now, but when I eventually need to service the cooling system again I would like to more heavily consider the inline modification.
@Extinct , does the inline mod drop temps significantly over the OEM 180 if everything else is working properly in the cooling system? From what I have read it seems like the coolant is able to flow better with the inline mod. Also you can use an off the shelf thermostat. Are there any other benefits I am missing?
Max temp I ever see is 197, runs 185-194 99% of the time. I am not interested in a kit right now, but when I eventually need to service the cooling system again I would like to more heavily consider the inline modification.
#9
It does seem to hold the temperatures more consistently around 185 with less variation, my daily with a safari grill runs 188 on the highway with ambient at 90 degrees. The other advantage is you can run different temp thermostats, I run 170's in my older trucks. You can actually run a 170 in the 03-04's in the summer without throwing a code if you live in the south, as even though it technically with throw a code if it does not see enough temperature, in the summer that situation never occurs. I actually leave the house in the morning with my AC on here in VA. You can change the thermostat without losing more than a cup of coolant, and if needed for testing you can easily run without a thermostat installed.
The following users liked this post:
arains44 (07-12-2020)
#10
Kit uses all factory hoses, so nothing custom. You can use any thermostat you want, 99-02 will throw a code if you use one less than 170, 03-04 with throw a code if you use less than 180. Send me your email and I can send you complete instructions in a PDF. Even if you don't use my kit, I still highly recommend the inline thermostat mod.
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