Change History

I stand corrected...... assuming Jake is correct.... and at a minimum, a bazillion times more qualified than me.

As a consumer of this avalanche of information and speculation over the years, I have come to a very simple (simple minded?) explanation for all of these failures... IMS being just one...... this engine was hastily designed and or testing was incomplete. Remember, Porsche was failing and rumored to be on the auction block (or about to be put there). The Boxster and the single platform approach was to (and did) save the company.

Most information out here is about the IMS but there are more failure modes.... and if you remember back in 1999 (when I got into this), failures were pretty common..... for reasons not even mentioned anymore..... porous blocks, slipped sleeves (from factory-fixed porous blocks), out-of-round rear main seals as evidenced by leakage IIRC and there was another... maybe it was just the bigger 911 bores..... where some bolt sheared on some shaft that then wagged around the engine (maybe this was actually the IMS bearing... but I don't think so).

It is a pity they blew it with the engine, although not surprised as the engine is the most complex, as the cars were really terrific.

Peace
Bruce in Philly

I stand corrected...... assuming Jake is correct.... and at a minimum, a bazillion times more qualified than me.

As a consumer of this avalanche of information and speculation over the years, I have come to a very simple (simple minded?) explanation for all of these failures... IMS being just one...... this engine was hastily designed and or testing was incomplete. Remember, Porsche was failing and rumored to be on the auction block (or about to be put there). The Boxster and the single platform approach was to (and did) save the company.

Most information out here is about the IMS but there are more failure modes.... and if you remember back in 1999 (when I got into this), failures were pretty common..... for reasons not even mentioned anymore..... porous blocks, slipped sleeves (from factory-fixed porous blocks), out-of-round rear main seals as evidenced by leakage IIRC and there was another... maybe it was just the bigger 911 bores..... where some bolt sheared on some shaft that then wagged around the engine.
(maybe this was actually the IMS bearing... but I don't think so).

Peace
Bruce in Philly

I stand corrected...... assuming Jake is correct.... and at a minimum, a bazillion times more qualified than me.

As a consumer of this avalanche of information and speculation over the years, I have come to a very simple (simple minded?) explanation for all of these failures... IMS being just one...... this engine was hastily designed and or testing was incomplete. Remember, Porsche was failing and rumored to be on the auction block (or about to be put there). The Boxster and the single platform approach was to (and did) save the company.

Most information out here is about the IMS but there are more failure modes.... and if you remember back in 1999 (when I got into this), failures were pretty common..... for reasons not even mentioned anymore..... porous blocks, slipped sleeves (from factory-fixed porous blocks), and outout-of-round rear main seals as evidenced by leakage IIRC.
and there was another... maybe it was just the bigger 911 bores..... where some bolt sheared on some shaft that then wagged around the engine.

Peace
Bruce in Philly

I stand corrected...... assuming Jake is correct.... and at a minimum, a bazillion times more qualified than me.

As a consumer of this avalanche of information and speculation over the years, I have come to a very simple (simple minded?) explanation for all of these failures... IMS being just one...... this engine was hastily designed and or testing was incomplete. Remember, Porsche was failing and rumored to be on the auction block (or about to be put there). The Boxster and the single platform approach was to (and did) save the company.

Most information out here is about the IMS but there are more failure modes.... and if you remember back in 1999 (when I got into this), failures were pretty common..... for reasons not even mentioned anymore..... porous blocks, slipped sleeves (from factory-fixed porous blocks), and outt-of-round rear main seals as evidenced by leakage IIRC.

Peace
Bruce in Philly

I stand corrected...... assuming Jake is correct.... and at a minimum, a bazillion times more qualified than me.

As a consumer of this avalanche of information and speculation over the years, I have come to a very simple (simple minded?) explanation for all of these failures... IMS being just one...... this engine was hastily designed and or testing was incomplete. Remember, Porsche was failing and rumored to be on the auction block (or about to be put there). The Boxster and the single platform approach was to (and did) save the company.

Most information out here is about the IMS but there are more failure modes.... and if you remember back in 1999 (when I got into this), failures were pretty common..... for reasons not even mentioned..... porous blocks, slipped sleeves (from factory-fixed porous blocks), and outt-of-round rear main seals as evidenced by leakage IIRC.

Peace
Bruce in Philly