Assuming that you’re keen on buying an S55 fueled M2, M3, or M4 unwavering quality is a significant angle to consider. As M vehicles, they’re positively not the modest direct front.
In this article, we will cover a couple of normal issues and specifications with the BMW S55 motor. Notwithstanding, if it’s not too much trouble, remember – this is not the slightest bit a comprehensive rundown of every single likely issue. All vehicles and motors will have issues eventually.
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Table of Contents
BMW S55 Common Problems
- Crank HubÂ
- Valve Cover and Valve Cover Gasket Leaks
- Oil Pan Gasket Leaks
- Oil Filter Housing Gasket Leaks
We’ll give extra knowledge and examination on these S55 issues underneath. In any case, we should note – this post might be a piece untimely and a portion of these normal S55 issues are hypotheses.
For instance, the S55 oil channel lodging and gasket are precisely the same parts as utilized on the N54 and N55. It’s notable they are normal issues with those motors. Nonetheless, the issues normally don’t spring up until 80,000+ miles.
In all honesty, there aren’t enough S55 motors with this sort of mileage so it may not be a typical issue yet.
However, it’s reasonable and probably correct in the event that a similar plan is flawed on more established motors, these issues will probably become normal on the S55 as it ages.
1. BMW S55 Crank Hub Issues
We should move this first. We disdain to call this a typical issue for a long time. For one’s purposes, it’s truly not a generally expected issue.
This issue has been totally made a huge deal about. In any case, there are an adequate number of conversations with respect to flawed S55 wrench center points that it merits plunging into a piece further.
We do concur – it’s a disgrace the S55 didn’t get a keyed wrench center from the industrial facility. Notwithstanding, the S55 has similar wrench center point parts as the N55 motor (a significant number of those parts are likewise imparted to the N54).
Prepare to be blown away. Indeed, the N54 and N55 can encounter turned wrench centers. In any case, the issues are exceptionally segregated and remarkable.
Presently, the S55 makes 600+whp significantly simpler than the N54 and N55. The straightforwardness of making 600whp on the S55 might assume a part in why this has been promoted as a more normal issue on the S55.
Regardless, we wouldn’t pause our breathing even at those power levels. Comprehended turned wrench centers can be an issue on the S55.
Notwithstanding, don’t anticipate that the issue should occur (except if you’re essentially one inclined to horrible karma). Indeed, even on higher torque, modded vehicles, turned wrench center points appear to happen on under 1% of S55 fueled M2, M3, and M4s.
Furthermore, it’s anything but an issue that warrants a lot of worry to the point preventive updates are vital. For the most part, when the wrench’s center point turns it will lose motor planning.
You’ll essentially have to address the circumstance and supplant the wrench center point. In very uncommon cases, a turned wrench center might cause extra interior motor issues.
Once more, that is incredibly uncommon and will probably possibly happen to assume you keep driving and beating on the S55 with a generally turned wrench center point.
2. BMW S55 Valve Cover and Valve Cover Gasket Oil Leaks Â
Likewise with the N54 and N55 – and most other current BMW motors – the S55 valve cover and gasket are inclined to break and spill oil.
The elastic valve cover gasket is inclined to corrupt with age and mileage. Elastic gaskets exposed to high temperatures and steady warming/cooling cycles by and large don’t hold up well.
Ultimately, the elastic gasket breaks which brings about oil spills. The S55 valve cover gasket is precisely the same part as found on the N55.
The plastic valve covers themselves are known to break, too. It’s surely doubtful that the gasket spilling oil.
Notwithstanding, we enthusiastically suggest supplanting the valve cover alongside the gasket.
That might be over the top excess from the get-go, yet as S55 motors start approaching 100,000 miles it could be really smart to supplant the valve cover assuming the gasket is spilling in any case.
There have as of now been a lot of instances of spilling valve cover gaskets on the S55. It’s not incomprehensible for the valve cover to start spilling before 60,000 miles.
Two of our N54’s created valve cover gasket spills as soon as ~7 years old and ~75,000 miles. Be that as it may, these oil spills are generally normal around 80,000-100,000+ miles.
We suspect before long we’ll know about increasingly more valve cover region leaks.2. BMW S55 Valve Cover and Valve Cover Gasket Oil Leaks.Â
Reliability of BMW S55
In general, BMW’s S55 motor is really a great execution motor with strong dependability. Large numbers of the issues we’ve talked about all through the post aren’t really “normal issues” at this point.
In any case, the three oil spills – valve cover gasket, oil skillet gasket, and oil channel lodging gasket – are altogether normal parts with the N54 or potentially N55. It’s reasonable to guess the S55 will also share those normal issues.
In any case, large numbers of oil spills create following 5-7 years and 80,000+ miles. There basically isn’t enough S55s with that mileage to say how normal these issues will be.
Regardless, assuming that you’re on the lookout for a drawn-out S55 keep these issues in your sub-conscience.
It’s conceivable you’ll run into somewhere around a couple of these oil spills before 100,000 miles.
Luckily, all of the above oil spills are modest gaskets. For the DIY swarm, they are somewhat simple fixes.
Notwithstanding, they’re tedious so you ought to either go through a day or end of the week in the carport or dish out a good lump of cash for work. In any case, the BMW S55 motor is looking magnificent so far dependability astute.
The reality of the situation will become obvious eventually if and when some other normal issues spring up on the S55 stage.
In any case, at the present time, the S55 seems as though one amazing motor that can make 600+whp with essential bolt-ons and do as such with good dependability.
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