Why does my Porsche 911 make a knocking noise?
The M96 and M97 engines are famed for cylinder scoring – deep gauges in the cylinder liner, usually associated with a knocking noise and eventually catastrophic engine failure. The root cause of this issue is open to discussion, however, wear in the piston rings and liners causes the piston to wobble.
What causes a Porsche 911 engine to wobble?
The wobble occurs at the bottom of the stroke and results in the piston skirt dragging against the cylinder wall thereby scoring the liner. More recently, this issue has also been seen on the later engines. An early telltale sign can often be one exhaust tailpipe being more sooty black than the other.
What kind of engine does a Porsche 996 have?
Results from this can be fun – we made 425HP from a 4.0L engine rebuilt from a broken 3.6L – however, you’re going to need a $25K budget to start the project! M96 engines fitted to the 996 and early 997 can have issues with a bearing at one end of the intermediate shaft. The shaft connects the two ends of the engine timing gear.
What causes smoke at the start of a Porsche 911?
The smoke at startup can also be caused by a air oil separator (AOS) that is going bad but not completely failed yet. The M96 and M97 engines are famed for cylinder scoring – deep gauges in the cylinder liner, usually associated with a knocking noise and eventually catastrophic engine failure.
What kind of noise does a Porsche 997 make?
This article applies to the Porsche 911 997 (2005-2012). There are certain noises that those of us who own a car never want to hear as they are sometimes the first indication that something has failed or is about to fail. They could also mean you’re going to have to fork out some cash.
The wobble occurs at the bottom of the stroke and results in the piston skirt dragging against the cylinder wall thereby scoring the liner. More recently, this issue has also been seen on the later engines. An early telltale sign can often be one exhaust tailpipe being more sooty black than the other.
Are there any problems with the Porsche 996?
Not all of the 996 cars will have the IMS problem, and it can be rectified for a few grand if you’re concerned, but it’s on the mind of every buyer out there. IMS problems aside, the 996 is absolutely stuffed with fragile, fast-wearing and expensive components, many of which can’t be reached without dropping the engine.
Are there any mechanical problems with my Porsche 911?
Listed below are Porsche 911 common mechanical problems with their likely resolutions. These are the most frequent 911 problems diagnosed by our repair shops over the years. An accurate diagnosis of an issue by a Porsche mechanic typically saves you time and money – see our guide to local independent Porsche repair shops that can help.
Listed below are Porsche 911 common mechanical problems with their likely resolutions. These are the most frequent 911 problems diagnosed by our repair shops over the years. An accurate diagnosis of an issue by a Porsche mechanic typically saves you time and money – see our guide to local independent Porsche repair shops that can help.
How many Porsche 911s have bad IMS bearing?
However, in the real world less than 5% have actually failed or can be directly linked to an engine failure. Porsche shipped approx. 77,000 vehicles to the USA that could have a bad IMS bearing. Even the most enthusiastic counting of IMS failures produces a total around 3500 or less than 5%.
Why is the Check Engine light back on on my Porsche 911?
The fault codes will suggest faulty O2 sensors. This results in many folks replacing the front O2 sensors in the hopes of solving the problem, only to discover that within a few hundred miles the check engine light is back on. The problem is actually caused by the MAF failing and by owners blindly believing the reported engine faults.
The fault codes will suggest faulty O2 sensors. This results in many folks replacing the front O2 sensors in the hopes of solving the problem, only to discover that within a few hundred miles the check engine light is back on. The problem is actually caused by the MAF failing and by owners blindly believing the reported engine faults.
However, in the real world less than 5% have actually failed or can be directly linked to an engine failure. Porsche shipped approx. 77,000 vehicles to the USA that could have a bad IMS bearing. Even the most enthusiastic counting of IMS failures produces a total around 3500 or less than 5%.
The M96 and M97 engines are famed for cylinder scoring – deep gauges in the cylinder liner, usually associated with a knocking noise and eventually catastrophic engine failure. The root cause of this issue is open to discussion, however, wear in the piston rings and liners causes the piston to wobble.
What causes a howling noise in the rear of a car?
Cause:Worn rear pinion bearing or worn gear set Noise:Howl without whir or rumble while accelerating at any speed (gears previously quiet) Cause:Worn gear set due to lack of lubrication or overloading Noise:Howling while accelerating over a small speed range (gears previously quiet) Cause:Worn gear set due to lack of lubrication or overloading
Why does my car make noise when the temperature is warmer?
Noise gets worse in warmer weather Cause: Posi chatter due to improper lubrication; worn clutches or spider gears; improper assembly Noise:Banging, crunching, or popping while making a turn. Noise not affected by temperature Cause: Badly worn or broken spider gears