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Krokodil

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About Krokodil

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    Contributing Member

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  • From
    California
  • Porsche Club
    POC (Porsche Owners Club)
  • Present cars
    2007 Cayman S
  1. The car is alive again. Fired last Friday 3/20 and was racing Saturday AM at WSIR. The diagnosis was a failed #1 rod bearing, resulting in a broken craddle, two broken cases, a broken, rod, a couple of bad pistons, etc. We purchased a used Cayman engine (from a 3.8 swap) with just over 2000 miles on it (Brad, you apparently know this engine) to use as a rebuild donor. Several chnages to improve oiling and reliability including a modified crank and installation of Carrillo rods: Cheers,
  2. Only X51 engines. thx Loren, what about the 2005 and beyond 3.6 and 3.8 engines... did they have any type of oiling implements that were not present in the 2002-2004 3.6 engines? Bump to Loren. I am also curious as to 1) are there changes to the M97 that make this modification unnecessary and 2) if not, can this kit be installed on the M97? Cheers, From the 997 Technik book... "The 911 Carrera engine employs a mechanical vacuum pump instead of a conventional sucking jet pump to provide the vacuum for the brake booster. This pump is driven in tandem configuration together with the oil extraction pump of the right cylinder head by the exhaust camshaft of the right cylinder bank. This design enables a high and constant level of vacuum supply and subsequent effective brake boost even when the most unfavorable underlying conditions apply, e.g. low external air pressure at high altitudes, and in highly dynamic driving involving a high proportion of full-load operation, e.g. on race tracks." Thank you for the reply. I now understand that there is a different pump used on the M97 vs. M96 and that it should provided superior vacuum for brake boost, but what does this mean for the oiling system. Can a secondary return line, similar to the PMNA part for the M96, be installed on the M97? It appears that this revised "tandem pump" makes use of the old M96 pump impossible, but is there a way to add a similar return line? Is this already built into the head/valve cover? Cheers
  3. Only X51 engines. thx Loren, what about the 2005 and beyond 3.6 and 3.8 engines... did they have any type of oiling implements that were not present in the 2002-2004 3.6 engines? Bump to Loren. I am also curious as to 1) are there changes to the M97 that make this modification unnecessary and 2) if not, can this kit be installed on the M97? Cheers,
  4. Brad, Thank you for the photos and information. Yes, I know the engine and was there when it failed. According to Quinn there were significant high-range overrevs, so many that he doubts the accuracy. I assume it was quinn that called you from the track. The car is at Vision and the engine was set to be torn down yesterday. There was bearing material in the pan and oil filter, but I do not know any more beyond that. I assume if you contact Dwain he will share his findings with you, and vice versa. I hope to visit the shop on Monday PM. Cheers,
  5. The engine in my 2007 Cayman S failed this past weekend while on track. It lost power, began to vibrate, displayed the CEL and low oil pressure warnings, and began to clank. The engine has 46K miles on it, including 5000+ on the track. While the engine is not yet completely apart (should happen today) the initial inspection showed connecting rod bearing material in the oil pan. Other parts may have failed as well, but this is what we know for now. Our path forward is not yet clear. We can install an OEM remanufactured engine, buy a local used engine, our more than likely rebuild the existing engine (if possible) with stronger parts (Carrillo rods, etc). So, the question for those of you that have been through this with either the M97 or M96 engine is what else fails and should be strengthened during rebuild? We know there is an IMS issue, but what else? Please do not tell me to remove my track parts, take it to the dealer and lie about what happened. This is not how I work. I raced the car and violated the warranty plain and simple. List of failures, strengthening needs: 1) Connecting Rods 2) IMS 3)
  6. Good explanation, I am more and more convinced that the idle ticking on the right bank isn't a bad tapped but something related to other components or a lubrication problem (clogged duct?). However those parts doesn't belong to the 3.4 (996) engine, they are part of the improved variocam (plus) of the 3.6 version, so my problem actually should be a different one :( cheers Teo Teo, The problem could be the same. The 3.4 in the Cayman has the variocam plus head. It is different from the 3.4 in the 996. Cheers,
  7. Adding cross post for the record: My 2007 Cayman S (M97.20 engine) developed the similar/same "tick" that was intially random and finally became constant. Over the next week or so the car developed several other noises that sounded like the exhaust/heat shield rattling. After some investigation the transmission was removed and the DM flywheel was found to have failied (the car is raced). Our hope, therefore, was that this failure was the root of all evil. Unfortunately it was not, and when the car was back on the ground all of the noises were still present. Other symptoms included occasional rough idle and hesitation. Further investigation focused on the lifters and other valve train components, as the ticking noise certainly sounded like a lifter, and the problem was identifed as a failed hydraulic actuator in the variocam system (996 105 301 XX). The part was repaired/replaced and all nosies are now gone. It appears that the tick was a sticking actuator and the coincident noises were the chains, etc. flailing around as a result of improper postioning/tension (speculation). These noises did not develop until the actuator failed completely. I will not share the shops secrets for isolating the problem, but if you contact Dwain Dement at Vision Motorsports in Laguna Hills, CA (949.770.2888) I am sure he can help you resolve your issue. Cheers,
  8. My 2007 Cayman S (M97.20 engine) developed the similar/same "tick" that was intially random and finally became constant. Over the next week or so the car developed several other noises that sounded like the exhaust/heat shield rattling. After some investigation the transmission was removed and the DM flywheel was found to have failied (the car is raced). Our hope, therefore, was that this failure was the root of all evil. Unfortunately it was not, and when the car was back on the ground all of the noises were still present. Other symptoms included occasional rough idle and hesitation. Further investigation focused on the lifters and other valve train components, as the ticking noise certainly sounded like a lifter, and the problem was identifed as a failed hydraulic actuator in the variocam system (996 105 301 XX). The part was repaired/replaced and all nosies are now gone. It appears that the tick was a sticking actuator and the coincident noises were the chains, etc. flailing around as a result of improper postioning/tension (speculation). These noises did not develop until the actuator failed completely. I will not share the shops secrets for isolating the problem, but if you contact Dwain Dement at Vision Motorsports in Laguna Hills, CA (949.770.2888) I am sure he can help you resolve your issue. Cheers,
  9. Yes, I understand that the two chamber AOS will fit on the 986 Boxster. In fact, Porsche has apparently had a TSB in place (see attached .pdf) on this for quite some time (at least in the UK). Vision Motorsports in Laguna Hills, CA should be able to do the installation as they did the install on my Cayman S (this was a PITA). The part can be ordered directly from Suncoast Porsche (or any dealer) and does not need to be ordered through a race shop. Cheers, Porsche_Oil_Ingestion_Fix_1_.pdf
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