Porsche Engines Have a Short, Well-Known List of Weak Points

Every Porsche generation has its reputation, and knowing it tells us where to look first. The water-cooled flat-sixes in the 996, the early 997 and the first Boxsters carry the intermediate shaft bearing — the IMS — that owners worry about for good reason. Rear main seals on the same family weep oil onto the clutch housing. The air-oil separator fails and sends white smoke out the tailpipe on start-up, which looks far worse than it is.

Cayenne V8s have their own problem: plastic coolant pipes under the intake that crack with age. Coolant smell, a dropping reservoir, then overheating. That one isn’t optional.

About the IMS. Most engines never suffer the failure, but the ones that do usually fail without warning and take the engine with them, which is why so many owners replace the bearing preventively while the transmission is already out for a clutch. Your call. We’ll give you the facts.

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Porsche Brakes Wear Faster Than Owners Expect

Porsche brakes are among the best on the road, and they’re sized and priced accordingly. Big rotors, multi-piston calipers, pad-wear sensors that trigger a dash warning. Driven hard on Mt. Tam’s descents, pads and rotors go quickly. Driven gently, they can glaze and squeal instead. Both need attention.

A proper Porsche brake job measures rotor thickness, checks the calipers and uses the pad compound the car was designed around. Brake fluid matters as much as the hardware on a car like this, because fluid that has absorbed moisture boils sooner and gives you a long pedal right when you need a firm one. A squeal on a cold morning can be normal with some pad compounds. Grinding never is.

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Chassis Parts Take a Beating on Marin’s Broken Pavement

Worn bushings, ball joints and dampers are typical Porsche chassis wear, and San Rafael’s patched streets speed it up. Stiff suspension and big wheels transmit every crack. A knock over speed bumps or a wandering feel at freeway speed usually lives in the front suspension, and a Macan or Cayenne with air suspension adds struts and a compressor to the list.

Alignment matters here more than on most cars. A Porsche slightly out of spec eats the inside edge of expensive tires fast.

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A Gas Porsche’s First Service Comes at One Year or 10,000 Miles

According to Porsche Cars North America, the first included service on a gasoline Porsche comes at one year or 10,000 miles, and later services keep roughly the same yearly or 10,000-mile rhythm. That cadence suits a car driven regularly.

A garage queen needs a different plan. A 911 that covers a few hundred miles a year still ages its oil, fluids, battery and tires, so the calendar matters more than the odometer. The schedule should fit how you actually drive, including which recommended items can wait. That call takes someone who knows these cars; our lead technician holds certificates in Porsche diagnosis and repair.

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Porsche Owners From Larkspur, Ross and Belvedere

Larkspur and Greenbrae sit just south of the shop on 101, and Ross and Kentfield drivers take Sir Francis Drake to the freeway and are here in minutes. Belvedere and Tiburon owners come up past Corte Madera. Cars that only come out for Sunday drives are welcome too. Leave the car, take a loaner for a longer job, and pick it up when it’s done.

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