What Porsche engines suffer from bore scoring?

What Porsche engines suffer from bore scoring?

Bore scoring is primarily a problem with the 3.4 (m96. 01, m96. 02, m96. 04, m97.

Is a 1999 Porsche 911 reliable?

Very reliable, plenty of power, great handling the 1999 911 doesn’t have the IMS bearing failure that the newer models had from 2000 to 2006 because Porsche changed over using a single smaller IMS bearing that sometimes failed, the 1999 has a dual row (two bearing set).

What is the most reliable Porsche engine?

Total 911’s top six Porsche 911 engines of all time

1. 1) M97/74 – Porsche 997 GT3 RS 4.0.
2. 2) 911/83 – Porsche 911 Carrera 2.7 RS.
3. 3) M64/21 – Porsche 993 Carrera.
4. 4) M96/79 – Porsche 996 GT3 Mk1.
5. 5) 901/01 – 1964 Porsche 901.
6. 6) 9A1 – Porsche 991 Turbo.

What year did Porsche fix the IMS issue?

IMS Bearing Replacements for 2000 and 2001 Model Year Porsche Boxster and 911 Engines. Starting with model year 2000 and ending with 2001 models, Porsche Boxster and 911 engines were fitted with both dual row and single row intermediate shaft bearings.

What year did Porsche fix IMS problem?

Not to nitpick, but the difference is that in 2009 model year, Porsche eliminated the IMS bearing completely. However, the 2006-20008 (with the exception of some very early 2006 model years that still had the left over M96 motor) did not eliminate the IMS bearing, but basically eliminated the failure of the bearing.

What causes bore scoring Porsche?

A lack of cylinder & piston lubrication is the major cause of wear or bore scoring. A rich mixture can wash the oil off your cylinder walls, so by driving off immediately you will help burn more of the excess fuel. Change your engine oil once a year or every 3-5k miles.

How common is Porsche bore scoring?

Bore scoring isn’t a problem for the direct fuel injection engines of the second generation Porsche 997 or for the first generation Turbos and GT models. With the first generation flat-six engines, it is most likely to occur on the 3.8 but is rare on the 3.6.

What years are the most reliable Porsche 911?

Anything from 1984 onwards is your best buy for reliability. The pick of those is the 87-89 models because they had a better gearbox.

Is a Porsche 911 reliable?

The Porsche 911 is the highest-ranked model for trouble-free ownership in the J.D. Power 2021 U.S. Vehicle Dependability Study (VDS), released today. The Macan ranked as most dependable among Premium Compact SUVs, and overall the Porsche brand across model lines improved to second-place in the annual study.

Is there a problem with my Porsche 911 Carrera?

This “D-chunk” problem seems ironically to occur mostly in gently driven cars. 911 Carreras that are driven hard at the track or on the street do not tend to see this type of damage. At least with respect to the track cars, one theory is that these cars tend to have their oil changed much more often.

Is there a problem with the Carrera 3.4 engine?

The problem affects mostly the 2.5 Boxster and Carrera 3.4 engines. When this failure happens, you will see oil and coolant begin to mix together or a slight unexplained coolant loss. If your engine experiences this failure, it can be rebuilt using LN Engineering’s Nickasil liners installed.

What happens when the air separator fails on a Porsche 911?

When this unit fails, the result is oil sucked out of the engine and into the intake. While the air-oil separator will not cause immediate mechanical damage to your engine, it may make it smoke tremendously and/or run roughly (see Pelican Technical Article: Porsche 911 Air Oil Separator).

What causes the engine liner to crack on a Porsche 911?

Excess vibration and twisting from the normal operation of the engine appears to be causing some cracking in these liners, resulting in a small chunk of the liner breaking off.