The parts get thrown away so they can never be used again. Aside from keeping your Cayenne 955 up to date with the best quality Porsche-approved A40 spec engine oil and engine oil filter, using a proven anti-friction additive such as LIQUI MOLY Ceratec or MoS2 will help to ensure maximum lubrication and protection even in low or zero oil pressure situations. The Porsche 957 Cayenne has a saddle-style fuel tank with low-pressure in-tank fuel pumps on both the left and right sides. Using a walnut blaster combined with manual cleaning and using. This coolant is easily identifiable by its pinkish/purple color, and all variations of G12, G12+, and G13 are compatible with each other. Pour “one quarter” bottle of Joe Gibbs Driven fuel injector Defender in every fill-up of … Porsche 955 Cayenne 4.5 L NA V8 (Engine Code: M48.00), Engine type: Naturally Aspirated 90-degree V8, aluminum block and heads, DOHC, 4-valves per cylinder, Porsche VarioRam dual-plenum intake manifold, Porsche VarioCam variable valve timing, dry sump lubrication, Displacement: 4.5 L (93mm bore x 83mm stroke), Porsche 955 Cayenne 4.5 L Twin Turbo V8 (Engine Code: M48.50/M48.50S), Models: Porsche Cayenne Turbo, Cayenne Turbo S, Engine type: Twin-turbocharged 90-degree V8, aluminum block and heads, DOHC, 4-valves per cylinder, Porsche VarioCam variable valve timing, dry sump lubrication, Power output: 444hp/457 lb-ft of torque (Turbo) - 514hp/531lb-ft of torque (Turbo S), Porsche 955 Cayenne 4.5 L NA/Twin Turbo V8 Engine Problems, If you have a Porsche Cayenne coolant leak and have the 4.5 L M48.00/M48.50 engine, it is often the coolant pipes that have cracked or failed. We have developed a specific (very unconventional) regimen to diagnose these issues, and share them in our hands- on training classes offered by www.theknowledgegruppe.com and we have shared this with over 1,400 Independent  Technicians who have attended our classes worldwide since 2008. In the beginning, internal combustion engines favored heavy, dense, thermally stable cast iron engine blocks for their durability in meeting these criteria. The M4801 and M4951 4.8 L Porsche Cayenne V8 engines feature a brake vacuum pump to assist in building vacuum for the power brake system. Either of these symptoms will typically result in a check engine light and stored fault codes for a performance malfunction or mechanical malfunction in the cooling system. You’ll know you have an engine misfire because your Cayenne will develop a rough idle, may have a loss of power, and a flashing or solid illuminated check engine light along with stored misfire fault codes in the PCM. It’s common for the coolant expansion tank to crack and leak on all engine variants of the 955 Cayenne. While the parts are not too expensive, you do need to remove the transmission to perform a timing chain service on a VR6 engine. Still, several changes are made to the M48.50 Turbo that increase power and make it more durable. Lots of short trips, low RPM use, and not using full throttle or running to redline every so often will make the carbon build up more quickly. You should not either. Note: If the engine is ran too long with this degree of damage, the scoring will lead to cylinder cracking, and ultimately a completely different level of failure. Typically, since no scoring is visible, it supports the aforementioned narrative that the failure is a “lifter”. Like the M48.50, the M4851 does away with the Porsche VarioRam intake manifold, instead relying on boost pressure from the twin turbochargers to make massive amounts of torque. These are not coatings! Since the intake manifold is Cayenne-specific, you have to use the Genuine Porsche Cayenne V6 intake manifold repair kit to replace the worn bushings. Well, its simple… Even though to properly address this issue the engine has to be completely disassembled, and extensively machined to overcome the issue (and make sure the instance doesn’t happen again) this is the failure that has the least amount of collateral damage to the remainder of the engine internals. When your coolant expansion tank fails, it will begin to leak. ), The noise will have the same rhythm and tone as a typical hydraulic lifter issue, One tailpipe more sooty than the other(this is often thought to be related the the failure occurrence, but it actually is a symptom of the equation that creates this failure!). If the water pump fails completely, it can result in overheating due to lack of coolant flow, or the impeller can make contact with the block and begin to cause some damage. that should last well over 100,000 miles, provided that the car receives proper oil changes. Basically, the coolant crossover pipe that runs between the two cylinder heads at the back of the engine has a bonded (glued) hose barb that can loosen due to adhesive deterioration. If the tank is nearly full, you will need to drain it before performing the service. Read or watch to learn more about car vacuum pumps. Symptoms of bad in-tank fuel pumps include a loss of engine power, stumbling, stalling, being slow to start, or not starting at all. The NA and Turbo variants do use different designs, with the NA 4.8 L V8 having a single port and Turbo having a dual-port connection. If caught at early onset we may be able to save your engine without full reconstruction! to replace the faulty part, but thankfully it’s not that expensive. The Turbo Cayenne M48.50 has piston oil squirters that increase oil lubrication and aid in piston cooling, including at cold start. The first symptom of a failing water pump is typically a small leak. This is because the unburned fuel will wash the engine oil from the cylinder walls, causing an increase in friction and wear between the piston and the cylinder wall. Pay attention to the smell of burning oil and look for oil collecting on the bottom sides of the cylinder valve covers as a sign your valve cover gaskets are leaking. This is no challenge for us- its another day at the office for our team, as we have build more engines afflicted with this mode of failure than anyone in North America. Once the coolant falls to a low enough level, you’ll get a low-coolant warning on your dash. Over time these can fail, mainly due to the extreme heat they have to deal with. Diagnosis of this failure often begins with tests using an “electronic ear”. If the spark plug hole gasket sections fail, you will see oil on the bottom of the ignition coils and on the porcelain of the spark plugs. As always, it’s best to replace all ignition coils at the same time to ensure the best performance and reliability. Extremely worn timing chain guides and rails will cause timing correlation codes, and the engine can eventually jump time and cause major internal damage. There will be a rough idle, loss of power, and a check engine light along with fault codes for cylinder misfires. The reward is in the unmatched driving experience that the Cayenne can deliver, whether on or off road, and at nearly any speed. This T junction is not available alone, and you need to purchase the. The air/oil separator failure symptoms include rough running at idle, visible oil smoke from the tailpipe, check engine light, stored fault codes likely for a lean run condition, and oil consumption issues. Porsche dealerships and independent specialists will typically have higher labor rates compared to many other European makes, resulting in substantial savings if you can tackle a lot of the smaller problems and services yourself. The 3.2 L VR6 features a durable cast-iron block with a narrow-angle 15-degree inline V6 design and a single aluminum head, 4-valves per cylinder, variable valve timing, a dual-plenum intake manifold, and port injection. Lots of short trips, low RPM use, and not using full throttle or running to redline every so often will make the carbon build up more quickly. Preventative replacement at 80,000 miles will help ensure you don’t get stranded, and as with all the other engines we’ve talked about, it’s best to replace them as a complete set. Along with the fuel that bypasses the piston rings, is a dreadful mix of combustion byproducts, including trace amounts of carbon which will mix (suspend) with the engine oil, and be delivered to all internally lubricated components within the engine. This is generally very noticeable and can easily be confused with a more serious problem such as rod knock or piston slap.