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Si6 Coolant Crossover Pipe Question

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Old Apr 6, 2025 | 08:21 PM
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ponderosajack's Avatar
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Default Si6 Coolant Crossover Pipe Question

I tried to search for this but was unsuccessful.
For 2017 Si6:
Can someone please point me to the discussion that gave the original LR crossover pipe part numbers and the aftermarket aluminum ones that they used?
I'm thinking of doing this now and would like to research it a bit.
Thanks
 
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Old Apr 7, 2025 | 08:21 AM
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I've attached the OEM plastic part numbers below, but apparently now OEM crossover pipes are all metal for the supercharged V6 and V8 engines. The NA V8 still uses plastic parts. If you put these parts on JLR of Palm Beach's parts department website, you should be able to get the superseded part numbers.



 
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Old Apr 7, 2025 | 09:04 AM
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Thank you for that parts list. I did see it in my search but I thought it was for the V8 engine (LR3).
 
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Old Apr 7, 2025 | 11:20 AM
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Originally Posted by ponderosajack
Thank you for that parts list. I did see it in my search but I thought it was for the V8 engine (LR3).
That parts list is from my invoice from when I had the crossover pipes replaced on my D5. As far as I know, these have all been superseded with metal pipes on the supercharged engines only. The LR3 had the 4.4 V8 and doesn't have the coolant pipe problems. You're probably thinking of the LR4, which had the 5.0 NA V8 and the supercharged V6.
 
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Old Apr 7, 2025 | 02:55 PM
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https://landroverforums.com/forum/ne...-pipes-123695/

Have not found the rear crossover pipe available in aluminum from LR but there are some aftermarket options
 
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Old Apr 7, 2025 | 08:25 PM
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Thank you all. I am checking it out this week.
 
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Old Apr 7, 2025 | 08:50 PM
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From what I have found so far both of the supposedly new aluminum numbers LR186859 and LR186917 are both called Coolant Outlet Flange which is not what the cross over pipes are called.
The Coolant Outlet Flange appears to be part number LR122710 and doesn't look like the upper or lower (or front or rear) cross over pipe. And then one website had a picture of this which looked like a small flange, completely different than a C shaped tubing assemble shown in other pictures.

I will stop by my local dealer and try and pull the parts up on their computer and then get them to show me the part and I will take pictures.

The other photo that was just posted separately for the aluminum numbers LR186859 and LR186917 appear to be at least one of the two crossover pipes but I couldn't tell well enough from the pictures which was which and if they were the right ones. Didn't see clarification on Palm Beach JLR website either.

To be continued....
 
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Old Apr 10, 2025 | 12:03 PM
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Originally Posted by ponderosajack
From what I have found so far both of the supposedly new aluminum numbers LR186859 and LR186917 are both called Coolant Outlet Flange which is not what the cross over pipes are called.
The Coolant Outlet Flange appears to be part number LR122710 and doesn't look like the upper or lower (or front or rear) cross over pipe. And then one website had a picture of this which looked like a small flange, completely different than a C shaped tubing assemble shown in other pictures.

I will stop by my local dealer and try and pull the parts up on their computer and then get them to show me the part and I will take pictures.

The other photo that was just posted separately for the aluminum numbers LR186859 and LR186917 appear to be at least one of the two crossover pipes but I couldn't tell well enough from the pictures which was which and if they were the right ones. Didn't see clarification on Palm Beach JLR website either.

To be continued....
LR122710 is the plastic rear crossover pipe.
 
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Old Apr 10, 2025 | 11:28 PM
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Thank you. It will be next week before I can sort this out with my dealer.
 
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Old Apr 11, 2025 | 08:10 AM
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Originally Posted by ponderosajack
Thank you. It will be next week before I can sort this out with my dealer.
I'm hosting a cars & coffee event at my dealer tomorrow. I can ask my parts guy for a diagram if you want.
 
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