V8 Coolant Manifold / Crossover & Maintenance Parts List

richg

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Does anyone have a complete recommended parts list for replacing the coolant manifold / crossover pipes on a 2012 V8 LR4? I found this list in one of the threads, but no confirmation as to if this was accurate.

LR018275 - Tube Water Outlet
LR109402 - Heater Manifold Tube
LR011038 - Bleeder Cap
LR032135 - Thermostat
LR049989 - Thermostat to Engine Cooling Hose
LR045238 - Throttle Coolant Hose
LR010881 - Intake manifold gaskets
LR048165 - Throttle gaskets

Also, I'm hitting 90K, haven't had to do much in the way of maintenance other than brakes, oil changes, and some odd electrical bits since we purchased with ~30K on it. Any other specific recommended PM items and what are all of the additional parts I need to do them?

I am aware of all of the items listed in the maintenance schedule (https://congletonservice.com/service-schedule/LR4.pdf), thinking more about the items NOT listed there (eg, water pump, but what other parts are needed to be purchased if you are going to change the water pump?).
 

richg

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I finished this up yesterday. Along with both plastic coolant crossover pipes, I did the water pump, thermostat, and both belts. Here is the parts list I used:

LR018275 - Tube Water Outlet
LR109402 - Heater Manifold Tube
LR011038 - Bleeder Cap
LR032135 - Thermostat
LR064185 - Serpentine Belt
LR012663 - Accessory drive (fan) belt
LR028136 - Oil cooler line
LR030593 - Oil cooler line o-ring
LR097165 - Water pump

I ordered and replaced these parts also, but they aren't really needed for the job:

LR049989 - Thermostat to Engine Cooling Hose -- Original was in good condition, this new part is re-designed though and must be used with 45238
LR045238 - Throttle Coolant Hose -- Original was in good condition, this new part is re-designed though and must be used with 49989
LR010881 - Intake manifold gaskets -- originals were fine, wasn't needed
LR048165 - Throttle gaskets -- original was fine, wasn't needed

I was lucky and replaced the parts before I had a failure. Once I unbolted the front crossover tube and started to try to remove it from the engine, it simply disintegrated at the two ports. I had to pick the broken bits out of the block.

E6C55BC0-FB46-4AF8-AB38-E23CB996ED53.jpeg
7939A8CD-1888-499B-A132-91B8C29680C3.jpeg
F12A2B84-0FC3-4392-A866-81789E966198.jpeg
 

ktm525

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Nice summary and an even nicer shop in the background. Is that a lathe?

Did you remove the belts just for replacement purposes?

Also did you remove the clutch fan?
 

richg

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Nah, just a metal cutting bandsaw.

I wanted to replace the belts simply as PM since the truck is a 2012 and has 90K miles on it. It was a good thing I did as the serpentine was cracked. The fan belt looked great, but you have to remove it to get the serpentine belt off (there is no adjustment to it, it is a stretch belt).

For the clutch fan, yes. I just borrowed the fan clutch tool kit from advance auto (https://shop.advanceautoparts.com/p...an-clutch-wrench-set-4-piece-648746/9150044-P). It has the right size 36mm wrench, but the one for holding the pulley bolts wasn't great but did the job.
 

ktm525

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Fan did not have to come off if it was just a cross over replacement though correct?
 

richg

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Correct, removed it for doing the water pump and belts.
 

Al Pizzica

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This is a great thread, thank you for adding this to the collective.
 

fireangel1313

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@ 125k miles...
Just did mine this past weekend and thanks for the part numbers! Only had to purchase a new fan, water pump, front crossover tube, rear oil cooling tube, 2 gallons of coolant, and thermostat. I didn't have to replace any tubing or manifold gaskets, everything was in decent shape. I replaced my cooling fan only bc it was making that stupid ticking sound. I didn't have to remove the fan belt at all to get the new serpentine belt back on, just cut the old one off and thread the new one back behind the fan over that pulley that is so hard to get to (thanks LR!).
I found the same issue pictured above, that both tubes into the block had disintegrated and my water pump may have been leaking as well. There was a bunch of dried up coolant built up under the pump. Be careful when reattaching the water pump since the oil cooler tube has a gasket that can get twisted and pinched. ADVICE...install the water pump while the air manifold is up/off so that you can line everything up. When I removed the old water pump I found that the oil cooler gasket was twisted and had apparently been installed incorrectly! This may have also been a source of leakage. So now I'm wondering if this had all been done before and by whom? It wasn't on the maintenance history.
I also had some air in the system afterwards but after driving it a little bit and topping off the system it was all good! No leaks so far!

Good luck!
 

ryanjl

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At 125k miles, I'd be surprised if your water pump was not already done at least once.

Mine was done sometime before I bought it (I bought at 42k miles), and again under my stewardship at 80k miles when I brought it into the dealership for my "last hurrah" under my CPO warranty.
 

fireangel1313

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I think you are right...after getting in there and seeing some things I think it had been done before. I think I’ll be doing it again at 180k ish. Not too hard of a task.


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