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I developed a substantial coolant leak that was pooling under the back right tire. I am assuming this is the dreaded "rear coolant crossover pipe". I intend to do the job myself and clean up the intake valves from direct injection, upgrade the supercharger pully, service the supercharger, as well as replace spark plugs and possibly coils. Are these easier to do while doing this service?
What I'm looking for is the following:
Supercharger oil - best place to buy, type, etc.
Supercharger service, what other parts should I replace? Are there any performance mods to do while its out?
Are spark plugs easier to access with the supercharger and ancillary parts off? or are these still a pain in the ***?
Best coilpacks - I know from my other cars there are preferred coilpacks. Is there a strong recommendation from the forum?
Any other maintenance items "while in there"?
Picture of my car (blackpack)
I have found the following threads and information as resources.
Disconnect battery Lift car up Take off both under panels Loosen the radiator cap Drain radiator from drain **** using nickle coin in vice grips Remove the big 17mm allen nut from left side of engine to drain Remove wiper arms Remove main cowl Remove the cross bar Remove the secondary cowl Remove the fuel line cross Undo the connector for vacuum line on the right side of engine Remove the fat hose above engine from the air filter box Remove the air filter covers, remove the lower air filter box Remove the elbow for the intake in the front of radiator Remove the intake cross in the throttle body Remove the throttle body but leave the hose Remove the 10 screws for the intake manifold Pull intake forward and remove the electrical connector, then remove from car Remove the header tank Remove the hose in the lower radiator Remove the upper radiator hose Disconnect the hose going to the right side metal Remove the hose into the transmission cooler Remove the 4 screws holding on the thermostat and crossover plastic Remove everything else connected to the water lines Pull out the thermostat and all the hoses Remove the water pump Remove the plastic crossover for water pump Remove the rear crossover Remove the electrical and both water hoses from crossover Clean the intake valves Clean the throttle body and the maf sensors Remove and replace the idler, tensioner, and belt Replace all the plastic and hoses and reassemble
Vic, I will be following with interest. I'm waiting for my 2010 to spring it's coolant. I like the idea of taking care of everything while the supercharger is off. I encourage you to document and share your experiences. Your post prompted me to sign up. All the best!
I just had the rear coolant heater pipe changed. I could smell coolant. I think the pipe was weeping for a while. It’s quite a lot of effort to remove and replace one plastic pipe.
The mechanic said the intake valves were very clean. He was quite surprised. I’ve used the CRC GDI Intake Valve cleaner twice since I’ve had this car. Maybe it works well.
Definitely do the plugs since you’ll have a lot moved out of the way. Do the supercharger coupler also. I went with the solid coupler upgrade. And you can use the supercharger oil from zzp performance.
Last edited by Oxidizer2k; Jun 3, 2021 at 11:17 PM.
What other parts did members replace while in there? Lots of conflicting info on what parts to replace and I've wasted hours trying to sort through parts list and diagrams.
@Oxidizer2k What sold coupler did you go with? I would like to avoid ZZP from past experiences, is there a brand, weight/viscosity you recommend?
@prolepsis Good to know on the CRC cleaner, thanks!
What other parts did members replace while in there? Lots of conflicting info on what parts to replace and I've wasted hours trying to sort through parts list and diagrams.
@Oxidizer2k What sold coupler did you go with? I would like to avoid ZZP from past experiences, is there a brand, weight/viscosity you recommend?
@prolepsis Good to know on the CRC cleaner, thanks!
lol then you’re going to hate this.. I went with the zzp coupler from eBay. The fluid itself isn’t a zzp brand, but a GM fluid. You can look for that on Amazon.
I just bought a 2015 XF a month ago, 3.0 S/C with 63,000 miles on it, and now have a coolant leak. I can't drive more than 15 miles without the Low Coolant warning coming on. I can smell coolant, but it's not leaking onto the ground and I don't notice much smoke or burnoff coming from the engine compartment. It seemed to happen pretty suddenly. I have a service appointment next week to have it looked at. After only having the car for a month, I'm pretty frustrated and upset.
Most likely you need a water pump and a number of plastic cooling parts changed out. Very common and just age related. Can you DIY the repairs?
We have several very good threads on how to repair/replace all of this stuff.
Yes I would replace the thermostat while your in there but DO NOT just replace the thermostat. You have a number of other failure prone items that should all be changed at the same time.
Otherwise you will just be back at it again in a short time.
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.
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Most likely you need a water pump and a number of plastic cooling parts changed out. Very common and just age related. Can you DIY the repairs?
We have several very good threads on how to repair/replace all of this stuff.
Yes I would replace the thermostat while your in there but DO NOT just replace the thermostat. You have a number of other failure prone items that should all be changed at the same time.
Otherwise you will just be back at it again in a short time.
.
.
.
I have a service appointment early next week but wanted to try and tackle the thermostat housing myself beforehand. I'm hoping that will solve my immediate issue, then have the car looked over at the dealership. Maybe that's the wrong way to go about it, but I'm a DIY'er and just want to get it road-ready again ASAP.
You need to find where it's leaking first. Otherwise you're just throwing money at parts. Borrow / rent a cooling system pressure tester and track down the leak. As mentioned could be more than one. Some are hard to find but with pressure tester, some mirrors and patience you will find it.
Then when you are in there repairing it, fix other known wear parts at the same time (lots of plastic in modern cooling systems)
And please don't drive it!! If the pipe/leak gets worse and it dumps the coolant it will overheat before you know it. And these aluminum block engines warp and are destroyed in literally 30s of overheating. It's not worth the risk
If you can't tackle it yourself I'd strongly encourage you to flatbed it to dealer
Search on here for the posts that start "I thought I could drive it the 2 miles home..." or similar.
You need to find where it's leaking first. Otherwise you're just throwing money at parts. Borrow / rent a cooling system pressure tester and track down the leak. As mentioned could be more than one. Some are hard to find but with pressure tester, some mirrors and patience you will find it.
Then when you are in there repairing it, fix other known wear parts at the same time (lots of plastic in modern cooling systems)
And please don't drive it!! If the pipe/leak gets worse and it dumps the coolant it will overheat before you know it. And these aluminum block engines warp and are destroyed in literally 30s of overheating. It's not worth the risk
If you can't tackle it yourself I'd strongly encourage you to flatbed it to dealer
Search on here for the posts that start "I thought I could drive it the 2 miles home..." or similar.
I appreciate the advice! I'm having it flat-bedded to a Jaguar dealership tomorrow morning. I'd rather leave it to the pros, and the dealership is 35 miles away and don't want to drive it that far.
Good luck and hope it's nothing too serious. Do tell them while they have it drained down you are open to replacing other plastic parts that regularly fail. Much easier to do when you are there already!
I developed a substantial coolant leak that was pooling under the back right tire. I am assuming this is the dreaded "rear coolant crossover pipe".
Coolant under the back rear tire? Does no-one else think that is a little strange? Are you sure it's coolant? How does it get from the engine to under the back tire? Sounds more like exhaust condensation dripping to me.
OK, here's the $1700 diagnosis on my 2015 XF coolant leak.
The coolant only leaks when the thermostat opens, after which point it burns thru the entire reservoir at idle in about 15 minutes. Had my car towed about 35 miles and came up with the following.
-The dealership I bought the car from had replaced a "coolant tube" and didn't use the right clamps, resulting in a small leak
-The crossover tube under the supercharger is cracked and needs replaced. That is where the majority of the leak was coming from. It leaks down the front of the motor, making it seem like it might be the water pump.
-I had replaced the thermostat housing myself, hoping that was the issue...it was not. Bought the part from Rock Auto so only lost $40 and a bloody knuckle or 2.
The dealership doing the repairs charges $130/hr in labor. Could I do the repairs myself now that I know the issue? Yes, but....sometimes I would just rather leave it to the pro's. Gameplan is to send the invoice to the dealership I bought it from a month ago and have them help cover some of the chargers. They already alluded to "helping me out".
I just want my car back. I've only had it a month, traveled for 2 weeks due to work, and now this. I feel like I haven't even enjoyed it yet!
Well I have GREAT news! The selling dealer has agreed to cover all expenses for the repair, $1750. They were extremely understand about the entire situation and felt horrible that it all happened. There were also a few other parts that the service techs found that needed replaced, a plus for me.
Massive Coolant Leak - 2011 XFR - Planning Plastic Cooling System Overhaul
