Rear Crankshaft Oil Leaks on 2005-2007 GM Atlas 4.2L Engines
Verify the leak by looking at the end of the crankshaft (Figure 1). If oil is present in the bore (where the torque converter nose engages the crankshaft), a specialservice procedure should be performed. If the bore is dry, or oil appears to befrom the seal area, perform normal oil leak analysis. A service cup
How to Properly Dress Crankshaft Grinding Wheels
The grinding wheel must be dressedeach time it is placed on the machine, even though it may not have beenremoved from the wheel center. Mountthe wheel dresser on the grinder table. Bring the rotating grindingwheel up close to the diamond and start the coolant flow. Never dresswithout coolant. Frictional heat buildup can cause the diamond
Oil Leak By Crankshaft Seal on Porsche Boxter Engines
Models Affected: 97-’04 Boxter/Boxter S M96.23, M96.24 Engines Examination of engines that were the subject of complaints revealed other oil leaks in addition to those found in the crankshaft sealing ring on the flywheel side. These engine oil leak areas included: • Crankcase bolt threads • Intermediateshaft flange area. Since March 10, 2004, bolts with
Engine Bearings and Crankshafts: Best Friends Forever (BFFs)
Bearings appear to be such simple engine components. On the surface, they’re just half-circles of metal whose only purpose is to reduce friction between and support moving parts. The engine bearing has to establish and maintain a film of oil between moving and stationary parts to prevent wear to expensive engine components. They look like
Crankshaft Rear Main Oil Seal Leaks in Some 60-degree V6 GM Engines
This information only applies to 60 degree V6 engines. It is important to verify that the following information is correct before continuing: Models: 1986-2006 GM cars and light-duty trucks (including Saturn) with 2.8L, 3.1L, 3.4L, 3.5L, 3.9L 60 degree V6 engines (VINs D, E, F, J, K, L, M, N, R, S, T, V, W,
Crankshaft Replacement Caution for GM 2.8L, 3.6L Engines
Affects 2007-2010 models with 2.8L or 3.6L High Feature V6 engines (VINs D, T, V, 7 RPOs LP1, LLT, LY7). Repair Procedure: If the original crankshaft has a keyway slot and the replacement crank has a hole then round pin P/N 12585420 must be used, then install the harmonic balancer. Install a new bolt and
Revised Front Cover Crankshaft Oil Seal for GM 2.2L Ecotec Engines
Affected engines: 2002-2005 GM 2.2L Ecotec Four-Cylinder Engine (VINs D, F – RPO L61) Condition Some customers may comment on an oil leak from the front engine cover crankshaft oil seal during extremely cold weather. Cause During extremely cold weather, moisture at the engine crankshaft balancer may freeze to the crankshaft front oil seal, which
Understanding The Differences, Challenges Between Crankshaft Position Sensors
I have suggested to you to watch for this and make sure that you have that, and encouraged you to be certain that it is indexed to this position and so on. But I don’t believe that I have ever written about watching out for damaged as-cast reluctor rings, spark triggers or whatever other name
Importance of Manually Dressing Crankshaft Grinding Wheel
Mount the wheel dresser on the grinder table. Bring the rotating grinding wheel up close to the diamond and start the coolant flow. Never dress without coolant. Frictional heat buildup can cause the diamond to come loose or separate from its mount. Lack of lubricating properties, along with cooling, abrades the diamond needlessly. Best results
Evolving Crankshaft Designs and Applications
In the early days, a crank didn’t have to be very sophisticated or strong because most engines were an inline design, and the loads and speeds were relatively low. Fast forward to today. The evolution in engine technology, power and performance has led to a whole new generation of performance crankshafts that are a mechanical
Clearing The Confusion Concerning GM Gen III Crankshafts
Both Doug Anderson and I have written a number of articles and columns about these engines, but for some reason I continue to hear about the difficulties. So it’s time to go back to the basics, start from the beginning and review the old and add some new things that have come along. The first
Porsche Boxter M96 Crankshaft Bearing Housing Update
Upon inspection of complete engines replaced under Porsche factorywarranty, it has been determined that they are being replacedunnecessarily because of the above-mentioned engine noises. The noiseis caused by the crankshaft bearing housing. As of March 29,2005, a crankshaft bearing housing with thrust blocksmade of nodular cast iron is installed on all 2.7L engines from modelyear
Diesel Crankshaft Basics
The crankshaft turns this linear motion into a rotating motion that provides power to move a vehicle forward, operate generators or otherwise give measurable activity. Whether in a gasoline or diesel-powered engine, the crankshaft is a key component. With diesels, the crank is typically thought of as bigger, heavier and harder to get in the
GM Engine Oil Leak at Crankshaft Rear Main Oil Seal
Models: 1982-2005 Cars and Light Duty Trucks (Including Saturn) with 2.8L, 3.1L, 3.4L, 3.5L Engine. Note: This bulletin does not apply to 2004-2005 Saturn VUE models with 3.5L DOHC V6 Engine Correction A new design crankshaft rear main oil seal has been released. This seal incorporates features that improve high mileage durability. Replace the crankshaft
Crankshafts and Bearings for Street Performance and Racing
Most engine builders have strong opinions and brand preferences when it comes to choosing a crankshaft and bearing combination for a performance engine application. Their preferences (and prejudices) are usually based on years of experience, both good and bad. Many subscribe to the philosophy that “if it isn’t broke, don’t fix it!” Consequently, if they
Front Crankshaft Bolt Service Caution for 2001-2008 Mazda 2.3L Engines
When removing or replacing the crankshaft pulley, always be sure to follow the service manual procedures. The crankshaft pulley is not keyed to the crankshaft and when loosened, it may move out of position on the crankshaft. The engine MUST be re-timed whenever the crankshaft pulley bolt is loosened, removed, or replaced. CAUTION: Engine damage
Five Ways To Break The Nose of a Crankshaft
Scat Crankshafts has determined that 99 percent of the time it is the parts that are being used in conjunction with the crank and the additional machining done to the parts that are being used with the crank that are mostly responsible for crank breakage, NOT the crank. 1. IMPROPER MACHINED CRANK GEARS • Champher
Crankshaft Balancing
The first step in understanding crankshaft balancing is to understand the purpose of the counterweights. The counterweights are designed to offset the weight of the rod and pistons. You have the weight of the crankshaft and the pistons and rods. At any point in the assembly’s rotation, the sum of all of the forces are
Porsche Boxster 987 Crankshaft Seal Leaks
Crankshaft seals on some Porsche Boxster (987) engines may become damaged from being removed incorrectly. You must be careful not to damage the sealing lip during removal. The proper procedure for returning crankshaft seals to service are as follows: Only use the original packaging in which the new crankshaft seal was supplied (new cankshaft sealing
Crankshaft Selection Dictated by Design
We like to think that inside a modern engine, for all the violent explosions and metal-straining power, a whole world of harmony can be found. Parts work together to produce the most power possible, races are won and trophies are captured. Of course, this “cooperation” is a little deceptive. While there are dozens of parts