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I snapped a rod bolt in my '07 Cayman-S (a "money shift") and I'm looking at replacement options.

A local shop has a brand new short block, but its labelled "M96/03AT" - which I think is the block for an early 2000's 3.6.

Would this work with my heads (M97, Variocam +)?  What would be different?

Is it correct to assume that a newly remanufactured factory motor would have the latest IMSB?

The price makes it very compelling but not if I have to do a bunch of work arounds to get it to work.

-js

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  • Moderators
1 hour ago, jons said:

I snapped a rod bolt in my '07 Cayman-S (a "money shift") and I'm looking at replacement options.

A local shop has a brand new short block, but its labelled "M96/03AT" - which I think is the block for an early 2000's 3.6.

Would this work with my heads (M97, Variocam +)?  What would be different?

Is it correct to assume that a newly remanufactured factory motor would have the latest IMSB?

The price makes it very compelling but not if I have to do a bunch of work arounds to get it to work.

-js

 

Your engine is a VarioCam+, a 2000 engine would be a 3.2L  and carry the earlier VarioCam system.  Which IMS is in the engine would be determined by when it was rebuilt, 2002-2004 it would be the single row serviceable bearing; 2000-2001 could go either way, any earlier and it would be the dual row serviceable bearing; 2005 or later would have the oversized non serviceable bearing.

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I am only considering the short block.  All the Variocam stuff is in the heads, which I am reusing (after a refresh) from my M97.

I believe the M96/03 is from 2002-2004, and would be a 3.6L.

The question is whether this block would work with my 3.4L heads if there are any other complicating issues.

 

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1 hour ago, jons said:

I am only considering the short block.  All the Variocam stuff is in the heads, which I am reusing (after a refresh) from my M97.

I believe the M96/03 is from 2002-2004, and would be a 3.6L.

The question is whether this block would work with my 3.4L heads if there are any other complicating issues.

 

 

Sorry, but the 2002-2004 Boxster S engine was a 3.2L, not a 3.6L.  later models got a 3.4L engine, but there were no 3.6L M96/97 Boxsters from the factory, although there was a 3.8L 9A1 engine in 2015-2016 "Spyder" model. You can interchange 3.2 and 3.4 cylinder heads within certain bounds and caveats: Both engines need to have the same cam drive systems (chain styles and number of chains varied over model years).

 

 

986

  • 1997–1999 2.5 L (2,480 cc) 204 PS (150 kW; 201 bhp) 245 N⋅m (181 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six "M96.20"
  • 2000–2002 2.7 L (2,687 cc) 220 PS (162 kW; 217 bhp) 260 N⋅m (190 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam) "M96.22"
  • 2003–2004 2.7 L (2,687 cc) 228 PS (168 kW; 225 bhp) 260 N⋅m (190 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M96.23"
  • 2000–2002 3.2 L (3,179 cc) 252 PS (185 kW; 249 bhp) 305 N⋅m (225 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam) "M96.21" (Boxster S)
  • 2003–2004 3.2 L (3,179 cc) 260 PS (191 kW; 256 bhp) 310 N⋅m (230 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M96.24" (Boxster S)
  • 2004 3.2 L (3,179 cc) 265 PS (195 kW; 261 bhp) 310 N⋅m (230 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M96.24" (Boxster S "50 Jahre 550 Spyder")
VEHICLE                   ENGINE TYPE    MY            ENGINE NO.           TECHNICAL DATA [2]

BOXSTER                   M96.20         97 V          65V 00501>60000      6ZYL/2,5L /150 KW 
BOXSTER                   M96.20         98 W          65W 00501>60000      6ZYL/2,5L /150 KW 
BOXSTER                   M96.20         99 X          65X 00501>60000      6ZYL/2,5L /150 KW

BOXSTER                   M96.22         00 Y          65Y 00501>60000      6ZYL/2,7L /160 KW 
BOXSTER                   M96.22         01 1          651 00501>60000      6ZYL/2,7L /162 KW 
BOXSTER                   M96.22         02 2          652 00501>60000      6ZYL/2,7L /162 KW 
BOXSTER                   M96.23         03 3          653 00501>60000      6ZYL/2,7L /168 KW 
BOXSTER                   M96.23         04 4          654 00501>60000      6ZYL/2,7L /168 KW

BOXSTER "S"               M96.21         00 Y          67Y 00501>60000      6ZYL/3,2L /185 KW 
BOXSTER "S"               M96.21         01 1          671 00501>60000      6ZYL/3,2L /185 KW 
BOXSTER "S"               M96.21         02 2          672 00501>60000      6ZYL/3,2L /185 KW 
BOXSTER "S"               M96.24         03 3          673 00501>60000      6ZYL/3,2L /191 KW 
BOXSTER "S"               M96.24         04 4          674 00501>60000      6ZYL/3,2L /191 KW

987

  • 2004–2006 2.7 L (2,687 cc) 240 PS (177 kW; 237 bhp) 270 N⋅m (200 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam) "M96.25"
  • 2006–2008 2.7 L (2,687 cc) 245 PS (180 kW; 242 bhp) 273 N⋅m (201 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M97.20"
  • 2004–2006 3.2 L (3,179 cc) 280 PS (206 kW; 276 bhp) 320 N⋅m (240 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M96.26" (Boxster S)
  • 2006–2009 3.4 L (3,387 cc) 295 PS (217 kW; 291 bhp) 340 N⋅m (250 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M97.21" (Boxster S)
  • 2007–2008 3.4 L (3,387 cc) 303 PS (223 kW; 299 bhp) 340 N⋅m (250 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "M97.22" (Boxster "RS 60 Spyder Edition", Boxster S "Porsche Design Edition 2")
VEHICLE                   ENGINE TYPE    MY            ENGINE NO.           TECHNICAL DATA [3]

BOXSTER                   M96.25         05 5          615 00501>60000      6ZYL/2,7L /176 KW
BOXSTER                   M96.25         06 6          616 00501>60000      6ZYL/2,7L /176 KW
BOXSTER                   M97.20         07 7          657 00501>60000      6ZYL/2,7L /180 KW
BOXSTER                   M97.20         08 8          658 00501>60000      6ZYL/2,7L /180 KW

BOXSTER "S"               M96.26         05 5          625 00501>60000      6ZYL/3,2L /206 KW
BOXSTER "S"               M96.26         06 6          626 00501>60000      6ZYL/3,2L /206 KW
BOXSTER "S"               M97.21         07 7          677 00501>60000      6ZYL/3,4L /217 KW
BOXSTER "S"               M97.21         08 8          678 00501>60000      6ZYL/3,4L /217 KW

BOXSTER "S" RS SPYDER     M97.22         08 8          668 00501>60000      6ZYL/3,4L /223 KW

987 II

  • 2009–2012 2.9 L (2,893 cc) 255 PS (188 kW; 252 bhp) 290 N⋅m (210 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "MA1.20"
  • 2009–2012 3.4 L (3,436 cc) 310 PS (228 kW; 306 bhp) 360 N⋅m (270 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "MA1.21" (Boxster S)
  • 2010–2011 3.4 L (3,436 cc) 320 PS (235 kW; 316 bhp) 370 N⋅m (270 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "MA1.22" (Boxster Spyder)
VEHICLE                   ENGINE TYPE    MY            ENGINE NO.           TECHNICAL DATA [4]

BOXSTER                   MA1.20         09 9          __9 00501>99999      6ZYL/2,9L /188 KW
BOXSTER                   MA1.20         10 A          __A 00501>99999      6ZYL/2,9L /188 KW
BOXSTER                   MA1.20         11 B          __B 00501>60000      6ZYL/2,9L /188 KW
BOXSTER                   MA1.20         12 C          __C 00501>60000      6ZYL/2,9L /188 KW

BOXSTER "S"               MA1.21         09 9          __9 00501>99999      6ZYL/3,4L /228 KW
BOXSTER "S"               MA1.21         10 A          __A 00501>99999      6ZYL/3,4L /228 KW
BOXSTER "S"               MA1.21         11 B          __B 00501>60000      6ZYL/3,4L /228 KW
BOXSTER "S"               MA1.21         12 C          __C 00501>60000      6ZYL/3,4L /228 KW

BOXSTER SPYDER            MA1.21         11 B          C_B 50501>60000      6ZYL/3,4L /235 KW
BOXSTER SPYDER            MA1.21         12 C          C_C 50501>60000      6ZYL/3,4L /235 KW

981

  • 2012–2014 2.7 L (2,706 cc) 265 PS (195 kW; 261 bhp) 280 N⋅m (210 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "MA1.22"
  • 2014–2016 3.4 L (3,436 cc) 315 PS (232 kW; 311 bhp) 360 N⋅m (270 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "MA1.23" (Boxster S)
  • 2014–2016 3.4 L (3,436 cc) 330 PS (243 kW; 325 bhp) 370 N⋅m (270 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "MA1.23" (Boxster GTS)
  • 2015–2016 3.8 L (3,800 cc) 375 PS (276 kW; 370 bhp) 420 N⋅m (310 lbf⋅ft) water-cooled DOHC 24-valve Boxer flat-six (VarioCam Plus) "MA1.24" (Boxster Spyder)
VEHICLE                   ENGINE TYPE    MY            ENGINE NO.           TECHNICAL DATA [5]

BOXSTER                   MA1.22         12 C          __C 00501>60000      6ZYL/2,7L /195 KW 
BOXSTER                   MA1.22         13 D          __D 00501>60000      6ZYL/2,7L /195 KW 
BOXSTER                   MA1.22         14 E          __E 00501>60000      6ZYL/2,7L /195 KW 
BOXSTER                   MA1.22         15 F          __F 00501>60000      6ZYL/2,7L /195 KW 
BOXSTER                   MA1.22         16 G          __G 00501>60000      6ZYL/2,7L /195 KW

BOXSTER "S"               MA1.23         12 C          __C 00501>60000      6ZYL/3,4L /232 KW 
BOXSTER "S"               MA1.23         13 D          __D 00501>60000      6ZYL/3,4L /232 KW 
BOXSTER "S"               MA1.23         14 E          __E 00501>60000      6ZYL/3,4L /232 KW 
BOXSTER "S"               MA1.23         15 F          __F 00501>60000      6ZYL/3,4L /232 KW 
BOXSTER "S"               MA1.23         16 G          __G 00501>60000      6ZYL/3,4L /232 KW

BOXSTER SPYDER            MDB.XA         16 G          DBX 00501>60000      6ZYL/3,8L /276 KW 
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I'm confused - 3.2L Boxster-S?. The engine designation M96/03 is a 996 3.6L.  See PET page below.  

This M96/03 short block I'm looking at appears to have the same chains and same cylinder bore diameter as my M97 3.4L (which yes, is a 3-chain).  I believe only the stroke was changed when going from the 3.4L 996 to the 3.6L 996.   

Screen Shot 2020-09-06 at 12.56.55 PM.png

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I misread your original post, I thought the engine you are looking at came out of a Boxster, which cannot be a 3.6L.

 

Porsche has used more than one design chain for the IMS over the years which are not interchangeable as the gears and chain rails are also different:

 

spacer.png

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