NHC MOTORS · SERVICE RECORD
2012 BMW M3 E92 — Comprehensive Maintenance to Keep the Naturally Aspirated V8 for the Long Run
What does it take to keep a naturally aspirated V8 M3 in good condition? This 2012 E92 M3 received work on its upper engine, cooling system, DCT and suspension at 115,828 km, followed by wheel alignment.
Vehicle: 2012 BMW M3 E92 (naturally aspirated 4.0 V8, 115,828 km). Comprehensive maintenance for long-term ownership, carried out 2024-03-07 to 2024-03-21
Findings: previous maintenance had left the owner unsatisfied, so previously serviced items were re-inspected. Pre-adjustment alignment showed large deviations, including 9.2 mm of toe on one rear wheel
Work: valve cover gasket, ignition inspection, intake cleaning, water pump and thermostat, Evans coolant conversion with PrepFluid residual-water removal, engine oil with BG EPR/MOA, CHF11S power steering fluid, differential oil, DCT pan filter with TITAN FFL4, air and cabin filters, on-car disc resurfacing, Hofmann wheel balancing, OHLINS suspension kit with bushings and links, alignment
Result/care: final toe front 0.1/-0.1 mm, rear 0.1/0.2 mm, thrust angle -0.01 degrees. After the Evans conversion, never top up with water or conventional coolant
01 / NHC MOTORS
Why It Came In — Maintenance for Long-Term Ownership
Some aspects of the previous work remained unsatisfactory, so the car was assessed more broadly and the required work undertaken. These records span March 7–21, 2024.
Cooling, transmission and suspension condition matter alongside the engine. The aim is to identify the work this car needs, with records of the products, parts and results.
02 / NHC MOTORS
Top of the Engine — Valve Cover Gaskets, Ignition Check, Intake Cleaning
We removed the valve covers, replaced the gaskets and prepared the covers and mating surfaces.
The spark plugs and ignition coils were removed for inspection, and deposits in the intake passages were cleaned.
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Cooling System — Water Pump, Thermostat, and Evans Coolant Conversion
The water pump and thermostat were replaced, with attention to connections and coolant service as part of the cooling-system work.
The coolant was converted to Evans. PrepFluid and removal of residual conventional coolant and water formed part of the conversion; the recorded work includes clearing the lines.
The coolant type should be checked before later top-ups or repairs. Keeping the conversion in the service history helps avoid unintended mixing.
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Oils and Consumables — Engine Oil, Power Steering, Differential, Filters
We changed the engine oil and filter, using BG EPR and MOA as part of the service. EPR is a product for cleaning the inside of the engine, and MOA is an additive that reinforces the protective performance of the fresh oil. With over 110,000 km on a high-revving engine, we went one step beyond a simple oil change.
The power steering fluid was replaced with Fuchs CHF11S. Hydraulic steering fluid is an interval that is easy to overlook, and neglecting it puts strain on the pump and rack. We also serviced the differential oil — on a car like the M3, where the differential works hard, it belongs on the regular maintenance list.
The air filter and cabin filter were also replaced. Their service age and condition can be checked again at the next inspection.
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DCT — Pan Filter Replacement and the TITAN FFL4 Level Procedure
We replaced the DCT pan/filter and filled it with Fuchs TITAN FFL4.
The oil level was then adjusted at the specified fluid-temperature condition. The final level matters alongside the quantity added.
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Brakes and Wheels — On-Car Disc Resurfacing, Hofmann Balancing
We machined the brake discs on the car, working with each disc mounted to its hub.
The wheels were balanced on the Hofmann balancer alongside the suspension work.
07 / NHC MOTORS
Suspension — OHLINS Kit with Bushings and Links
The existing suspension was removed and an OHLINS height-adjustable suspension kit fitted. The photographs show the DFV dampers and assembled springs.
Bushing and link work was carried out alongside it. Surrounding connections matter as well as the new dampers when restoring the way the chassis responds.
Ride height and wheel alignment were checked after the suspension work, followed by alignment adjustment.
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Alignment — Before and After
Measured before adjustment, toe was 1.3 mm / -0.6 mm at the front and 0.7 mm / 9.2 mm at the rear. A rear wheel at 9.2 mm is a very large deviation — driving in that state affects tire wear and straight-line stability. The thrust angle was -0.34 degrees, meaning the rear axle was pointed away from the car's direction of travel.
After adjustment, the final figures were toe front 0.1 mm / -0.1 mm, rear 0.1 mm / 0.2 mm, with a thrust angle of -0.01 degrees. In practical terms, the rear axle is now aligned almost exactly with the direction the car travels.
Camber was adjusted from -1.60 / -1.58 degrees to -1.69 / -1.45 degrees at the front, and from -1.95 / -1.40 degrees to -1.97 / -1.78 degrees at the rear. At the rear in particular, the left-right difference narrowed from 0.55 degrees to 0.19 degrees, so both rear wheels now meet the road under much more even conditions. Setting the alignment on the newly built chassis completed this service.
Wheel alignment: before and after
Before adjustment
Toe readings (mm)
After adjustment
Toe readings (mm)
| Wheel | Before (mm) | After (mm) |
|---|---|---|
| Front left | 1.3 | 0.1 |
| Front right | -0.6 | -0.1 |
| Rear left | 0.7 | 0.1 |
| Rear right | 9.2 | 0.2 |
Questions about this work
Why redo items that had already been serviced elsewhere?
The owner was not satisfied with the results of previous maintenance, so we agreed to inspect previously serviced items ourselves and redo whatever was necessary. For a car being kept long term, knowing its true current condition and establishing a baseline is the starting point for all future care.
Why is PrepFluid needed when converting to Evans waterless coolant?
Waterless coolant loses its intended properties if old coolant or water remains in the lines. That is why we ran Evans PrepFluid through the system to remove residual water before the conversion. After converting, the system must never be topped up with water or conventional antifreeze.
How is on-car disc resurfacing different from replacement?
On-car resurfacing machines the disc surface while it is mounted on the vehicle, so runout can be corrected relative to the hub as assembled. It is an option instead of replacement when the disc thickness is still within usable range, and on this car the discs were resurfaced.
Related guides and work
Comprehensive Maintenance for the E92 M3 and High-Revving NA Engines
If you are considering a comprehensive inspection for an M3 of this generation or another high-performance car you plan to keep, bring a summary of the symptoms you are noticing and the car's service history to your consultation. We will separate what has already been done from what your car actually needs now, and quote accordingly.
We explain the scope of any repairs and the estimate before proceeding with your approval.
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