Uncategorized

Porsche Boxster, Cayman & 718 Service & Repair in Fort Collins, CO

Same Mid-Engine Formula. Very Different Generations.

The Porsche Boxster and Cayman are among the purest modern Porsche sports cars.

Their mid-engine layout gives them:

Excellent balance
Precise steering
Strong traction
Compact packaging
Distinctive handling

But mechanically, the nameplate covers several very different generations.

A 986 Boxster may involve:

M96 engine architecture
IMS-bearing concerns
Air-oil separator issues
Manual or Tiptronic transmission

A later 987 may add:

M97 engine architecture
Bore-scoring concerns on certain 3.4L cars
PDK on later models
Direct injection on later engines

A 981 may use:

Naturally aspirated direct-injected flat-six engines
PDK
PASM
More advanced chassis electronics

And the 718 generation may bring:

Turbocharged flat-four engines
Naturally aspirated 4.0L flat-six engines
PDK
Advanced PASM
GT4 RS / Spyder RS hardware

At A&B Import Auto, we’ve serviced European vehicles in Fort Collins since 1982.

Our first question is not:

“What’s wrong with Boxsters?”

It’s:

“Which Boxster, Cayman or 718 is this?”

Porsche Boxster / Cayman Generations

We service many modern Boxster and Cayman applications, including:

986 Boxster
987 Boxster
987 Cayman
981 Boxster
981 Cayman
718 Boxster
718 Cayman
Boxster S
Cayman S
GTS
GTS 4.0
Cayman GT4
Cayman GT4 RS
Spyder
Spyder RS

Porsche renamed the Boxster and Cayman family 718 Boxster and 718 Cayman beginning with the 2016 model transition. The new 718 range launched with turbocharged four-cylinder flat engines.

That naming change marks a real technical transition, not just a badge update.

Porsche 986 Boxster Service

The 986 was the original production Boxster generation.

It uses early water-cooled flat-six architecture and brought many of the same M96 engine concepts later associated with the 996-generation 911.

Relevant service topics can include:

IMS bearing
Air-oil separator
Rear main seal
Oil leaks
Cooling system
Manual transmission
Tiptronic
Suspension wear

The 986 is now old enough that:

Age
Maintenance history
Previous repairs

can matter just as much as mileage.

Porsche 986 IMS Bearing

IMS-bearing relevance depends on the model year and engine.

Specialist documentation from LN Engineering describes:

1997–1999 cars as generally using dual-row IMS bearings
2000–2005 cars as generally using the smaller single-row design
2006–2008 M96/M97 engines as using a larger single-row bearing that is not externally serviceable without engine disassembly

That means:

“It has an IMS bearing”

is not enough information.

The design matters.

Earlier vs. Later IMS Risk

The smaller single-row bearing used in many 2000–2005 cars is the design most associated with historical IMS failures.

That does not mean:

every early Boxster needs immediate engine work.

The right discussion includes:

Exact year
Engine history
Whether the IMS has already been addressed
What replacement system was installed
Current mileage
Clutch condition

Preventive planning should be based on the actual vehicle.

Clutch Work & IMS Opportunity

On applicable manual-transmission cars, clutch replacement already involves transmission removal.

That can create a logical opportunity to:

Inspect the rear main seal
Evaluate IMS history
Address a serviceable IMS bearing where appropriate

This is an example of using labor overlap intelligently.

It does not mean every nearby part automatically needs replacement.

Porsche 987 Boxster & Cayman

The 987 generation expanded the mid-engine Porsche family and introduced the Cayman coupe.

Depending on year and engine, 987 service may involve:

M96/M97 engine architecture
IMS concerns
Bore scoring
AOS
Oil leaks
Cooling
PDK
Manual transmission
PASM

The 987 generation also spans a major engine transition.

That makes early and late cars mechanically different.

987.1 vs. 987.2

This distinction matters.

987.1

Earlier cars commonly use M96/M97-family engines.

Relevant topics may include:

IMS
AOS
Bore scoring on certain engines
Rear main seal

987.2

Later cars moved to newer MA1 / 9A1-family architecture with direct fuel injection.

That changes:

IMS relevance
Fuel-system design
Engine-management strategy

So:

“987 Cayman”

is not specific enough for a meaningful diagnostic discussion.

Cayman S / Boxster S Bore Scoring

Bore scoring is especially relevant to certain 3.4L M97 Cayman S and later Boxster S engines.

LN Engineering identifies M97.21/M97.22 3.4L engines among the Boxster/Cayman engines it most commonly receives for bore-scoring repair.

That does not mean every 3.4L car is damaged.

It means those engines deserve informed inspection when:

Symptoms are present
Oil consumption is high
The car is being purchased
Engine condition materially affects the decision

Smaller Boxster / Cayman Engines & Bore Scoring

Not all M96/M97 Boxster and Cayman engines have the same bore-scoring risk.

LN Engineering notes that:

2.5L
2.7L
3.2L

Boxster-family engines are much less commonly associated with classic bore scoring than the 3.4L S engines.

That is a good example of why broad statements like:

“All old Boxsters score bores”

are not useful.

Engine family matters.

Bore Scoring Symptoms

Possible clues may include:

Cold-start ticking
Oil consumption
Smoke
Sooty exhaust
Metallic wear material

But none of those symptoms alone proves scoring.

A proper evaluation may involve:

Borescope inspection
Oil/filter inspection
Supporting mechanical tests

before major repair decisions are made.

Borescope Technique Matters

On M96/M97 engines, simply looking through the spark-plug hole may not be enough to identify early scoring.

Specialist guidance recommends attention to the lower thrust side of the cylinders, where scoring may begin.

A quick look is not necessarily a complete inspection.

Porsche 981 Boxster & Cayman

The 981 generation moved the Boxster and Cayman farther into the modern Porsche era.

Depending on model, it may use:

Naturally aspirated flat-six engines
Direct injection
PDK
Manual transmission
PASM
Sport Chrono
More advanced chassis electronics

The classic serviceable IMS-bearing concern does not apply to the 981 in the same way it does to M96/M97 cars.

That changes the list of likely problems significantly.

Porsche 718 Boxster & Cayman

The 718 generation introduced turbocharged four-cylinder engines to the regular Boxster and Cayman range.

Porsche announced the 718 family as a new model series beginning with the 2016 transition.

Depending on variant, 718 service may involve:

Turbocharged flat-four
Naturally aspirated 4.0L flat-six
PDK
Manual transmission
Turbo boost control
Direct injection
PASM
Advanced chassis electronics

The 718 badge alone still does not tell us which engine is installed.

Porsche 718 Turbocharged Flat-Four

Many standard 718 Boxster and Cayman models use turbocharged four-cylinder engines.

Possible areas of diagnosis may include:

Turbocharger
Wastegate
Charge-air system
Boost sensors
Direct injection
Cooling
Ignition

A low-boost fault does not automatically mean:

bad turbocharger.

A charge-air leak, actuator or sensor issue may produce the same symptom.

718 Bore Scoring

Later 718 four-cylinder engines use different cylinder technology from M96/M97-era engines.

LN Engineering notes that 991.2 and 718 four-cylinder SUMEbore engines are less commonly associated with classic bore scoring than the older M96/M97 engines.

That means applying early Cayman S bore-scoring assumptions to every 718 is inappropriate.

718 GTS 4.0

The 718 GTS 4.0 uses a naturally aspirated flat-six rather than the turbocharged four-cylinder found in many other 718 models.

That changes the diagnostic picture.

Possible service areas can include:

Direct injection
Ignition
Cooling
PDK or manual transmission
PASM
Exhaust/emissions systems

Again:

same body family, very different engine architecture.

Cayman GT4 / GT4 RS / Spyder

GT-oriented Boxster and Cayman variants use more specialized hardware.

Depending on the car, this may include:

Naturally aspirated flat-six engines
High-performance cooling
Specialized suspension
Larger brakes
GT-specific aero
Performance-oriented transmission calibration

These vehicles should not be treated as ordinary base Boxster/Cayman applications.

Current 718 Model Family

Porsche’s current model information includes:

718 Cayman
718 Boxster
Cayman S
Boxster S
GTS 4.0
Cayman GT4 RS
Spyder RS

That breadth is another reason one generic “718 repair” list is insufficient.

Porsche Boxster / Cayman Air-Oil Separator

M96/M97-era cars use an air-oil separator as part of crankcase ventilation.

A failed AOS can create:

Heavy smoke
Oil consumption
Rough idle
Lean faults
Misfires
Abnormal crankcase vacuum

Those symptoms can overlap with more serious engine problems.

That makes AOS testing important before jumping immediately to conclusions about:

Rings
Bore scoring
Internal engine failure

Smoke Does Not Automatically Mean Bore Scoring

A smoking Boxster or Cayman may have:

AOS failure
Oil overfill
Internal engine wear
Other oil-ingestion issue

A cloud of smoke can look dramatic.

The severity of the symptom does not automatically tell us the severity of the repair.

Porsche Boxster / Cayman Oil Leaks

Possible leak sources depend on the generation.

On older M96/M97 cars, possible areas may include:

Cam covers
Rear main seal
IMS flange
Oil pan
Other sealing surfaces

Later cars can develop leaks from different:

Covers
Housings
Oil pans
Filters/coolers

The rule stays the same:

Find where the oil starts.

Rear Main Seal vs. IMS

These are different components.

Rear Main Seal

Seals the crankshaft near the transmission.

IMS Bearing

Supports the intermediate shaft on applicable engines.

A leak at the back of the engine does not mean the IMS bearing is failing.

And an IMS concern does not automatically mean the rear main seal is leaking.

Mid-Engine Cooling Systems

Boxster and Cayman models place the engine behind the passenger compartment while major radiators sit toward the front of the car.

That means coolant travels through long circuits.

Possible cooling-system concerns can include:

Water pump
Thermostat
Front radiators
Coolant tank
Pipes
Fans
Air trapped after repairs

Leak location may be far from the engine itself.

Water Pump Problems

Possible symptoms include:

Coolant leak
Noise
Overheating
Temperature warning
Poor circulation

But an overheating Boxster or Cayman does not automatically need a water pump.

Other possibilities include:

Thermostat
Radiator
Fan
Coolant loss
Air pocket

The system needs to be tested.

Older 986 / 996 Water Pump Campaign

Porsche later issued a workshop campaign for certain older 986 Boxster and 996 911 cars involving coolant-pump impeller failure.

That underscores that pump problems can involve:

Leakage
Mechanical failure
Broken impeller material

and not just an external drip.

Front Radiators & Debris

The front radiator area can accumulate:

Leaves
Road debris
Dirt

which can reduce airflow and trap moisture.

A front bumper opening may look clear while debris remains packed farther inside.

Periodic inspection is useful, especially on regularly driven cars.

Correct Cooling-System Bleeding

Mid-engine layout makes cooling-system filling important.

Air pockets can create:

Temperature fluctuation
Poor heater output
Circulation problems

Proper filling and bleeding after cooling-system repairs matters.

Porsche Boxster / Cayman PDK

Later Boxster and Cayman models may use PDK dual-clutch transmissions.

Possible complaints include:

Harsh shifts
Delayed engagement
Shudder
Warning messages
Limp mode

Potential causes may involve:

Clutch behavior
Fluid
Adaptation
Mechatronics
Sensors
Software
Internal mechanical wear

A PDK warning does not automatically mean:

complete transmission replacement.

Manual Transmission

Many Boxster and Cayman owners specifically seek out manual cars.

Possible concerns include:

Clutch wear
Difficult shifting
Hydraulic clutch problems
Linkage
Synchronizer wear
Transmission noise

A hard shift may be caused by a clutch that is not releasing fully rather than internal transmission failure.

Clutch Wear

Possible symptoms include:

Slipping
High engagement point
Chatter
Difficult gear selection
Burning smell

On applicable early cars, clutch work may also be a logical time to inspect:

RMS
IMS area

because of labor overlap.

Direct Injection

Later Boxster, Cayman and 718 engines use direct fuel injection.

Fuel-system diagnosis can involve:

Low-pressure pump
High-pressure pump
Fuel rail
Pressure sensor
Direct injectors

A low rail-pressure fault tells us:

the target was not achieved.

It does not automatically identify the failed component.

Misfire Diagnosis

A misfire can be caused by:

Spark plug
Coil
Injector
Fuel pressure
Intake leak
AOS/PCV
Boost issue
Mechanical engine condition

The cylinder number tells us where combustion failed.

It does not tell us why.

718 Turbo / Boost Diagnosis

Turbocharged 718 models add:

Wastegate control
Turbo actuators
Charge-air plumbing
Intercooling
Boost sensors

Possible symptoms include:

Low boost
Reduced power
Overboost
Hissing
Limp mode

We compare:

requested boost vs. actual boost

and identify why they differ.

PASM

Depending on configuration, Boxster/Cayman/718 models may use Porsche Active Suspension Management.

PASM controls:

Damper force

It does not replace ordinary suspension components.

A PASM-equipped car can still have worn:

Control arms
Bushings
Ball joints
Wheel bearings

Electronic suspension and mechanical wear can coexist.

Suspension Wear

Possible symptoms include:

Clunks
Steering looseness
Uneven tire wear
Poor alignment stability
Vibration

An alignment cannot fix:

Loose joint
Worn bushing
Failed wheel bearing

Mechanical condition comes first.

Tires Matter on a Mid-Engine Porsche

The Boxster/Cayman platform depends heavily on tire condition for:

Steering precision
Braking
Balance
Traction

We look at:

Correct size
Matching tires
Pressure
Tread depth
Age
Damage

A healthy chassis can feel terrible on poor tires.

Porsche Boxster / Cayman Brakes

Depending on model, braking systems may range from:

Standard iron brakes
Larger S/GTS brakes
PCCB ceramic brakes on high-performance variants

Possible concerns include:

Pad wear
Rotor wear
Brake-fluid age
Pulsation
Noise

Track-oriented cars deserve particularly close inspection.

Track Use

Boxster and Cayman models are popular track cars because of their balance.

Track use increases demand on:

Brakes
Engine oil
Cooling
Tires
Wheel bearings
Suspension
PDK/manual transmission

A track-used car may need a different maintenance strategy than a weekend street car.

Colorado Mountain Driving

Mountain driving creates sustained load on:

Cooling
Brakes
Engine
PDK/manual transmission

A marginal system may work normally in Fort Collins and show its weakness climbing into the mountains.

Where the symptom occurs is useful information.

Used Boxster / Cayman Pre-Purchase Inspection

These cars can be excellent used-Porsche purchases.

But the inspection should be generation-specific.

Useful checks may include:

Complete diagnostic scan
Maintenance records
Oil leaks
Cooling system
IMS history where applicable
Bore scoring where appropriate
AOS
PDK or manual transmission
Clutch
PASM
Suspension
Brakes
Tires

A generic sports-car inspection can miss expensive Porsche-specific concerns.

Buying a 986 Boxster

A 986 inspection may deserve attention to:

IMS history
AOS
Oil leaks
Cooling system
Clutch/transmission
Suspension age

But overall condition matters more than one famous issue.

Buying a 987 Cayman S / Boxster S

On applicable 3.4L M97 cars, bore-scoring evaluation becomes more relevant.

Specialist data specifically identifies the 3.4L M97.21/M97.22 engines as more susceptible than smaller 2.5/2.7/3.2 engines.

That makes a generation- and engine-specific PPI particularly valuable.

Buying a 981

A 981 inspection shifts attention toward:

DFI engine condition
PDK/manual
PASM
Cooling
Suspension
Electrical systems

rather than classic serviceable IMS concerns.

Buying a 718

A 718 inspection may include:

Turbo/boost system on four-cylinder models
Fuel system
PDK/manual
Cooling
PASM
Brakes
Evidence of track use

GTS 4.0, GT4 RS and Spyder RS models deserve a different inspection from a base 718.

How We Diagnose a Boxster / Cayman / 718

1. Identify the Generation

986?

987?

981?

718?

2. Identify the Engine

M96?

M97?

MA1 / 9A1?

Turbocharged four-cylinder?

4.0L flat-six?

3. Identify the Transmission

Manual
Tiptronic
PDK

4. Identify the Chassis Equipment

Standard dampers
PASM
GT equipment

5. Understand the Complaint

When does it occur?

Cold?
Hot?
Under boost?
Turning?
Braking?
After sitting?

6. Scan the Vehicle

We review the relevant:

Engine
PDK
Chassis
Electrical

systems.

7. Perform Physical Testing

Depending on the complaint:

Borescope
Crankcase-vacuum test
Cooling pressure test
Smoke test
Boost test
Mechanical inspection

8. Repair the Actual Failure

The generation tells us what systems exist.

Testing tells us which one failed.

Why We Don’t Diagnose These Cars From Reputation

Consider three mid-engine Porsches:

2002 Boxster

IMS and M96/AOS concerns may be relevant.

2007 Cayman S

M97 architecture and 3.4L bore-scoring risk move higher on the list.

2021 718 Cayman S

Turbocharging, modern DFI and boost control become much more relevant.

All three are mid-engine Porsche sports cars.

They are not the same car underneath.

That is why:

generation → engine → drivetrain → evidence

matters.

More Than 40 Years of European Experience

A&B Import Auto has serviced European vehicles in Fort Collins since 1982.

During that time, Porsche’s mid-engine sports cars have evolved from:

M96 naturally aspirated engines
Early manual/Tiptronic drivetrains

to:

Direct injection
PDK
Turbocharging
Advanced PASM
GT-focused 4.0L engines

The cars changed.

The diagnostic principle did not:

Known problems tell us where to look. Evidence tells us what is actually wrong.

Why Choose A&B Import Auto for Porsche Boxster, Cayman & 718 Service?

European Specialists Since 1982

We’ve spent more than four decades working with European vehicles.

Diagnosis Before Parts

We use Porsche failure patterns as diagnostic guidance—not as an excuse to guess.

Porsche-Capable Diagnostics

We diagnose:

Engine
PDK
Boost
Fuel
Cooling
PASM
Electrical systems

using appropriate diagnostic equipment and physical testing.

Quality Parts

Depending on the repair, we use:

Genuine Porsche
OEM
Carefully selected high-quality aftermarket components

Open Seven Days a Week

A&B Import Auto is available weekdays and weekends.

Convenience

Depending on availability, we offer:

Courtesy loaner vehicles
Local shuttle service
Vehicle pickup and delivery

5-Year / 50,000-Mile Warranty

Qualifying repairs are backed by our 5-year / 50,000-mile parts and labor warranty.

Porsche Boxster / Cayman / 718 Service in Fort Collins

If your Porsche needs:

Scheduled maintenance
Oil service
IMS evaluation
Bore-scoring inspection
AOS diagnosis
Oil-leak repair
Cooling-system repair
Water-pump diagnosis
Direct-injection diagnosis
Turbo / boost diagnosis
PDK service
Manual transmission / clutch service
PASM / suspension repair
Brake service
Electrical diagnosis
Pre-purchase inspection

A&B Import Auto can evaluate the car according to its actual generation and equipment.

Our Fort Collins shop is open seven days a week.

Schedule Porsche Boxster, Cayman or 718 Service

Call A&B Import Auto at 970-221-4700 or schedule your Porsche appointment online.

Frequently Asked Questions About Porsche Boxster, Cayman & 718 Service

What Boxster and Cayman generations does A&B service?

We service many 986, 987, 981 and 718-generation vehicles, including base, S, GTS and various GT-oriented models depending on the requested work.

What is the difference between Boxster/Cayman and 718?

Porsche renamed the model family 718 Boxster and 718 Cayman beginning with the 2016 transition, initially pairing the new designation with turbocharged four-cylinder flat engines.

Do all Boxsters have IMS-bearing concerns?

No. IMS relevance depends on engine architecture and generation. M96/M97-era cars use the classic IMS-bearing arrangement, while later engine families differ.

Which Boxster IMS bearings are considered higher risk?

Specialist documentation identifies the smaller single-row bearing used broadly in 2000–2005 M96 applications as the most problematic factory design historically.

Does the Cayman have an IMS bearing?

Early M97-powered Cayman models do use an intermediate shaft with a factory IMS bearing. Later MA1/9A1 engines use different architecture.

Are all Cayman S models prone to bore scoring?

No. The concern is especially relevant to certain 3.4L M97 Cayman S engines. Risk varies substantially by engine family.

Are smaller Boxster engines commonly affected by bore scoring?

The 2.5L, 2.7L and 3.2L engines are much less commonly associated with classic bore scoring than the 3.4L M97 S engines.

Do all 718 models have four-cylinder engines?

No. Many 718 models use turbocharged four-cylinder engines, while GTS 4.0 and high-performance GT/RS variants use naturally aspirated flat-six engines.

Does the 718 use PDK?

Many 718 models are available with PDK, while manual transmissions are also used on various models and performance variants.

Can a smoking Boxster simply have a bad AOS?

Yes. AOS failure can produce dramatic smoke, oil consumption and mixture problems on applicable engines. Smoke alone does not prove bore scoring or internal engine failure.

Why are Boxster/Cayman cooling systems unusual?

The engine is mid-mounted while major radiators are located at the front, requiring long coolant circuits through the vehicle.

Does A&B inspect Boxsters and Caymans for bore scoring?

Yes. Where the specific engine and circumstances make bore scoring relevant, borescope inspection and supporting tests can be incorporated into diagnosis or a pre-purchase inspection.

Does A&B service PDK transmissions?

Yes. We diagnose and service PDK systems according to the specific transmission and complaint.

Does A&B offer a warranty?

Qualifying repairs are backed by our 5-year / 50,000-mile parts and labor warranty.