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Old 04-04-2015, 05:47 AM   #1
thstone
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
M96 Engine Failure Mode List

With all of the talk about the IMSB and engine failures, I went looking for the often rumored list of 25 (or 26, or 27, or...) M96 engine failure modes but couldn't find it.

Does anyone have this list? If not, here is my first cut at creating it. Feel free to add to this so we have a complete list.

I can proudly stand up and say, "My name is Tom and I have personally experienced engine failure modes #12, #13, and #5."

What is your engine failure mode number?

M96 Engine Failure Modes
  1. Cylinder D-chunk
  2. Cracked cylinder
  3. Loose cylinder sleeve
  4. Porous engine case
  5. Spun rod bearing
  6. Rod bolt failure
  7. Rod failure
  8. IMS bearing failure
  9. IMS gears not fixed to intermediate shaft (press fit failure)
  10. Timing chain failure
  11. Timing chain tensioner (paddle) failure
  12. Valve lifter failure
  13. Valve lifter carrier failure
  14. Crankshaft failure
  15. Cracked head
  16. Head gasket failure
  17. Oil starvation (high g cornering)
  18. Variocam servo failure
  19. Blocked oil pickup (excess engine sealant, aka spaghetti)
  20. Oil pump drive shaft failure (hex shaft)
  21. AOS failure resulting in oil hydraulic lock in cylinders
__________________
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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