03-04-2018, 08:58 PM | #23 | |
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After that spark plug coils failed outside warranty, then valve cover gaskets started leaking outside warranty as did several hoses and an coolant expansion tank for a total of $2.5K and counting. They don't call it Break My Wallet (BMW) for nothing!! Good thing I brought the 7 yr 70K warranty. I am at 80K now and drooling over the 3rd Gen X3 M40i but wallet says not a chance yet! |
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03-04-2018, 09:01 PM | #24 | |
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Drives: 22 X3 M40i
Join Date: Jan 2009
Location: Albany, GA
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Garage List 1991 Toyota Pickup ... [0.00]
1997 Nissan 200SX S ... [0.00] 2006 Mitsubishi Lan ... [0.00] 2009 BMW 335i [0.00] 2015 BMW X3 M Sport [0.00] |
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03-05-2018, 03:32 PM | #26 | |
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N/a engines have different injectors and the OCI seems to be OK at 7,000 miles or so. The oil in turbo engines start getting black even after 2k miles or so. Not sure if this is a "cause" or not, but I started to change the oil in the N54 a tad sooner. Concerning cooling (WP & T-stat) I think both the small 4banger and the 6 turbo run hotter than the i6 n/a, plus the i6 n/a has the aluminum case WP as opposed to plastic housing on the turbo 6. Not sure what material the 4 turbo has. The 6 turbo, if the sparks are left too long - where 60 k miles is BMW change interval for 6 turbo - it will take down the injectors. On my N54 the injectors were gone right after I changed the plugs at 61k miles - that's when I purchased the car. So I think even 60 k might be a stretch. Last year I purchased my X3 with the i6 (N52) and I changed the plugs right after the purchase - car had around 60k miles as well. The original plugs had only a small stubble left - that's how bad they were. Car was not misfiring, but after the plug change, fuel consumption improved. Again, next time I will change them sooner. VCG and OFHG go faster on the turbo cars as well, plus the gazillion rubber vacuum tubes - all changed with silicon titanium laced hoses. Plus a few other minor "improvements like the aluminium nipple on the return water hose on both engines (N54 & N52) - on my daughter's X3 that nipple literally crumbled in my hands and the O-ring came out like 2 sizes bigger.
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e92is f25 N52 e83 N52 e46ci M54B25 (e53 N62 - sold, R.I.P. e39 M54B30) |
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03-10-2018, 09:12 AM | #27 |
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Mine died at 77k. At least it gave me a notice by the radiator fan kicking on full blast even when it’s below freezing temps. Not the easiest job. The good thing about our x3’s or N55 is the three bolts are steel and not aluminum.
Last edited by E90705; 03-10-2018 at 10:10 AM.. |
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