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 […]
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 […]
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 […]
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.
It is back on again! Should I have my car towed in? Is my engine bad?
These are just a few of the many things that we have heard over the years regarding that infamous and dreaded little light in your dash: the Check Engine Light (CEL)
But what does that little light actually mean? And unlike the Mayan prediction of the end of the world, your problem may be very minor – or it just may indicate a larger, more obscure problem.
On-Board Diagnostics System
Use of the CEL began with the introduction of the On-Board Diagnostics II system (OBD) starting in 1996. This system is a government mandated vehicle component that automatically checks and tests various vehicle emissions control items.