Technical Articles

9A1 Engine

TECHNICAL WORKSHOP By Jay Coates PORSCHE 9A1 ENGINE This article is intended to provide a brief, technical description of the Porsche 9a1 engine. Its design is robust and advanced. Main Differences from Predecessor M96 & M97 One of the main differences from the predecessors M96 & M97 is that the 9a1 engine has no IMS […]

HEART SURGERY

By Grant Lenahan Of course it’s heart surgery. That’s why we had a cardiologist on the team. Also, being a curious sort, he wanted to understand better what made these Boxster beasts tick. And so, under the watchful expert guidance of Gene Kirschner and Ken Smith of Autohaus (Peapack, NJ), we undertook pulling the motor […]

Gearbox Tech

On November 8 Will DiGiovanni hosted an excellent and information packed tech at his race shop in Long Valley NJ, focusing on transmissions and in fact the entire drive train aft of the motor. Thanks Will for hosting and spending so much of your Saturday afternoon with us, when, imagine, you could have been raking […]

Notice Correct Location for Fall Radiator Clinic The Popular Mechanic is located at 27 A Commerce St, Chatham NJ,

The Popular Mechanic is located at 27 A Commerce St, Chatham NJ,

Fall Radiator Maintenance for Boxster-Cayman, 996 and 997 Porsches.

This fall on Sept. 26th from 1PM to 3PM, at Jay Coates The Popular Mechanic, the Tech Committee will host its Fall workshop.  The theme will be Fall Radiator Maintenance for Boxster-Cayman, 996 and 997 Porsches.   We plan to have on hand a Boxster and a 997 for workshop demonstration, which will include the […]

Straight Talk about the IMS Bearing in the M-96 and M-97 Engine

Those 3 letters stand for something big – Intermediate Shaft (IMS). There has been much talk and information about it on the internet, some of it actually true, most just stories by people who have had a bad experience. Here are the nuts and bolts of it.

Porsche is no stranger to the IMS. Porsche has been using an IMS for along time. The 547 Carrera engine had one, in fact every 911 ever built has one. In the early engines, the IMS is known as a “layshaft” and does not present issues, even though it had the exact same job as the current IMS in regard to driving the camshafts. The problem is not the IMS but the IMSB (Intermediate Shaft Bearing) in the M96 and M97 engines.