10-30-2023, 02:25 PM | #1 |
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GodD@mn Coolant Leak- 2018 x1 X-Drive
Of course I had to jinx myself after replying to another post where someone asked how reliable the X1 may or may not be... WTF?
So I came out Sunday afternoon (after last driving the X1 Saturday morning) and opened the garage door to find a puddle of coolant at the front of our X1. Moved it over to our lift bay and cleaned up the mess. Didn't seem like alot but the felt aero shield seems to have absorbed quite a bit as it kept dripping overnight. Today is Monday I've been disassembly things, removed the intake manifold to verify it's not a leak from above. It's a slow drip that literally looks like it's coming from between the oil pan and block right where the oil filter housing is. I found pictures of the housing which is part of the oil cooler. Can anyone confirm if coolant runs through the cooler? I suspect this whole assembly which is partially plastic has cracked or a seal has failed but want to verify coolant actually runs through this piece. |
10-31-2023, 08:39 AM | #2 | |
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10-31-2023, 09:00 AM | #3 | |
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10-31-2023, 10:37 AM | #4 | |
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Most likely, it comes from the water pump or some of the hoses around (RealOEM). When was the last time you replaced it?
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10-31-2023, 11:19 AM | #5 | |
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11-03-2023, 11:06 AM | #7 |
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Updating this.
So I ordered the aluminum assembly from ECS and am waiting for that. I figured I'd post a picture for anyone else wondering how the coolant runs are into the oil filter housing/cooler assembly. Not too bad if you disconnect coolant hoses (or just let the leak continue while the car is sitting). I was concerned about cross contamination but the way the coolant runs are situated getting coolant into the oil runs is unlikely. Real pain and I will post a complaint to the NHTSA website. This is unacceptable considering this seems to be a problem stemming back to other models BMW has produced previously. |
11-11-2023, 02:26 PM | #8 |
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I think sooner or later, everyone will have the same problem. BMW engineering fail. Is it difficult to remove the oil filter assembly? There are some aluminum replacement on sale on Amazon. I will get that when the time comes.
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11-12-2023, 07:10 PM | #9 |
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It is actually not that difficult of a job, mostly just time consuming and messy (coolant and oil spillage). The thing to be careful with is all of the plastic parts, making sure you don't break anything. The intake manifold bothers me the most as you have to remove this to get access to the filter housing.
Finished up the job today finally. Have put roughly 60 miles on the X1 and no issues. The bleed procedure with the electric water pump never worked for me so I just did it the old fashioned way. Let the vehicle warm up and topped off as required. Picture of the aluminum filter housing. I picked up the one from ECS with lifetime warranty. Something to be aware of is the OEM filter housing plug and OEM filter with not fit directly. I swapped over the OEM filter housing and have to modify the OEM filter to get it to fit in the new aluminum housing. |
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04-12-2024, 05:57 PM | #10 |
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Doing this next weekend, same update as you. How long did it take you to do the entire job, end to end? Any hoses I might consider replacing at the same time?
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04-12-2024, 09:59 PM | #11 |
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I guesstimate it takes about 10-14 hours from start to finish for someone who hasn't done it before. I think it took us about 6 hours but the car sat for two weeks or so while I figured things out and waited for parts to arrive.
The only part you will need to replace is a plastic pipe that sits above the filter housing assembly. You have to remove this to get the housing out and I couldn't find just the o-ring for it. I bought the whole assembly with o-ring at ECS also. |
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04-15-2024, 06:04 AM | #12 |
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Hi, could you tell me where I can buy that piece?
I changed it in the shop 3 months ago and they confirmed that it was not made of metal. If someone can give me the information to make the purchase. Since the mechanic tells me that in 5-6 years it will happen again... thank you |
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04-15-2024, 11:32 AM | #13 | |
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05-06-2024, 03:16 PM | #14 |
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My wife's X1 has been suffering from the mystery coolant leak recently... it was really bad at one point that I took it over to a friends garage and up on the lift. We can't see anywhere obvious that it could be coming from. After squeezing some coolant hoses and doing an oil change the leak has gone back to barely anything.. still there but minor.
Everything I've read narrows it down to one of three possible failure points. A plastic coolant connector that mounts on the engine block. The oil filter housing. Or the water pump. So now I guess I'm gonna chase this PITA starting with the plastic coolant connector. If that doesn't stop it, it'll be on to the oil filter housing. If that doesn't work, I'll trade this turd in for something newer that doesn't have these stupid, Mini transverse mounted pieces of crap. Unfortunate that this is plaquing this car as my wife loves it... just the perfect size, good gas mileage and handles like a BMW. |
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05-06-2024, 04:19 PM | #15 | |
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Yea it's likely this cooler. A new car won't help, they all have plastic pieces where they shouldn't be and WILL fail after numerous thermal cycles. We moved onto an electric and are keeping our 23 y/o Volvo's that are always reliable. (now I really sound like an old guy!) |
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05-06-2024, 10:22 PM | #16 |
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Achievement unlocked! Also changed the stubby plastic connector pipe to block and some hoses.
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05-07-2024, 09:10 AM | #17 | |
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I'll follow up on my progress as I fall into the rabbit hole! lol |
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05-07-2024, 11:52 AM | #18 |
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05-07-2024, 11:57 AM | #19 | |
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Yes, the X1 was the kid hauler and I couldn't stand thinking the family getting stranded somewhere. I fixed the oil cooler then fixed the vent valve then traded it away. We still love our X1 and miss it but we don't miss the possibility of something else breaking on a six year old car. |
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05-09-2024, 02:22 PM | #20 |
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05-11-2024, 08:31 AM | #21 | |
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Can you provide a part number for the plastic pipe? Is it 11118511205, or the #7 in this picture? Last edited by Old_Ranger; 05-11-2024 at 08:53 AM.. |
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05-11-2024, 12:46 PM | #22 |
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