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a visit from spain - PORSCHE 964

porsche 964 mechanical overhaul

What exactly is a Porsche 964?

The Porsche 964 is a model of the Porsche 911 sports car manufactured and sold between 1989 and 1994. Designed by Benjamin Dimson through January 1986, it featured significant styling revisions over previous 911 models, most prominently the more integrated bumpers. It was the first car to be offered with Porsche’s Tiptronic automatic transmission and all wheel drive as options.

Name : Type 964 (“nine-sixty-four”, or “nine-six-four”) is Porsche’s internal code name for the 911 Carrera 2 and 911 Carrera 4 models, which were badged simply as “Carrera 2” and “Carrera 4”. “964” is used by automotive publications and enthusiasts to distinguish them from other generations of the Carrera.

Carrera 2 and 4 : The 964 was considered to be 85% new as compared to its predecessor, the Carrera 3.2. The first 964s available in 1989 were all wheel drive equipped “Carrera 4” models; Porsche added the rear wheel drive Carrera 2 variant to the range in 1990. Both variants were available as a coupéTarga or Cabriolet. A new naturally aspirated engine called the M64 was used for 964 models, with a flat-6 displacement of 3.6 litres. Porsche substantially revised the suspension, replacing torsion bars with coil springs and shock absorbers. Power steering and ABS brakes were added to the 911 for the first time; both were standard. The exterior bumpers and fog lamps became flush with the car for better aerodynamics. A new electric rear spoiler raised at speeds above 50 mph (80 km/h) and lowered down flush with the rear engine lid at lower speeds. A revised interior featured standard dual airbags beginning in late 1989 for all North American production 1990 MY cars. A new automatic climate control system provided improved heating and cooling. Revised instrumentation housed a large set of warning lights that were tied into the car’s central warning system, alerting the driver to a possible problem or malfunction. The suspension was redesigned using coil springs instead of torsion bars, the first major engineering changes since the original 911. The front suspension used MacPherson struts, a system that has continued for all subsequent versions, but the rear suspension retained semi-trailing arms.

The timeline

In Summer 2023, Jasmine PorschaLink received an enquiry for a general mechanical overhaul of a 1990 Porsche 964 C4 which resides in Spain.  The lack of Porsche Specialists in Spain meant the customer wanted to bring his lovely 964 over to us for the works required before heading off to the bodyshop for a cosmetic tidy up.  We advised our availability (third week of September 2023) and the car arrived in our workshop – without the sunshine!

Our technicians had a thorough look around the car and agreed the following works were to be carried out: –

  1. Engine removal and Major Service
  2. Replacement of Timing Chain and Cam Cover Gaskets
  3. Clutch and flywheel replacement
  4. Check tinware condition and replace as necessary, plus powder coating
  5. Replace suspension with Bilstein B16 coil overs
  6. Replace air con compressor
  7. Brake caliper refurbishment
Once we had the green light from our customer, the car was stripped and the following work was carried out throughout October and November 2023: – 
Engine & Gearbox : The engine and gearbox were removed in order to access the tinware and carry out a Major Service including Spark Plugs and Belts.  The timing chain and cam cover gaskets were also replaced, along with the covers receiving some TLC whilst removed – completely refreshing this 33 year old engine. A new clutch and flywheel was fitted, enabling smooth as-new gear changes.
Tinware : The tinware was inspected and replacement original pieces were sourced and ordered.  Once all tinware was with us, we sent the tinware off for powder coating to give a longer lasting durability, preventing the need for replacements for many years to come!
Suspension : The old suspension components were removed to be replaced with a Bilstein B16 Coil Over Suspension Kit. Front and rear H&R Performance Anti roll bars were fitted. Front drop links to suit the new lowered Bilstein suspension and track rod ends due to previous excessive wear were also replaced.
Both rear tyres were replaced due to age and signs of perishing.
Following the suspension and tyre replacement, a Four Wheel Laser Alignment was carried out.
Air Con System : The air conditioning compressor and engine drive belts were replaced with all new components. Newer style R134a fittings and gas were added to help make the car more universal and compatible with most modern air con machines. 
Brake Calipers : The brake calipers were removed and sent off to Bigg Red for refurbishment (who did an amazing job and are highly recommended!)  The customer supplied new braided brake line flexi hoses to be fitted with the freshly refurbished calipers.
Not only is the 964 now mechanically ready to be enjoyed next Summer, but is looking great too. Our technician; James, really went to town cleaning up the majority of mechanical and suspension components (which didn’t require replacement) making the 33 year old parts look as good as new. 
We say Adiós to this classic 911 as it makes its way back to Spain, with a stop off down South for a fresh coat of paint. This will really make the Guards Red pop in the Spanish sun, once again.
Winter is the perfect time to get your classic Porsche booked in, whether it needs a mechanical refresh or a complete restoration!   We are now working on a lovely Amaranth Violet Porsche 993, more details to follow soon!