‘Focus’ On Correct Blocks For Ford 2.0L Build Success
In fact, the block choices per application remind me of the "Mounds" and "Almond Joy" candy bars: sometimes you feel like a nut sometimes you don’t; only in this case sometimes you have crankcase ventilation open and sometimes you don’t. So let’s take a look at what we have found to this point and see
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,
Revised Cylinder Head Bolt Torque Specification and Tightening Sequence for 1994-2002 GM 3.1L and 3.4L Engines
This bulletin is a clarification of the revised cylinder head bolt torque and tightening sequence bulletin. The updated sequence and specification is as follows: • Tighten the cylinder head bolts to 44 ft.lbs (60 N-m) in the ordershown in illustration. Use the J 36660-A torque angle meter in order torotate the cylinder head bolts an
Evolution of File-to-Fit Ring End-Gap Theory Results in Changes
Common signs of butting end gaps are: scuffed ring faces, damaged rings and cylinders, and/or shiny areas on the butt ends of the ring. Using recommendations from ring manufacturers, engine manufacturers and your own personal experience is how most engine builders arrive at the desired end-gap. Current thinking regarding the end gap on most performance
Valve Seat Installation Tips
On passenger car and light truck engines with aluminum heads, valve seatsare usually factory installed with about .002? to .003? of interferencefit. Some say powder metal seats require a little more interferencefit than cast iron alloys, while cobalt alloy seats require a littleless because of their higher coefficient of thermal expansion. Keep in mind
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
Oil Cooler Leak on GM 6.6L Diesel Engines
The oil leak is caused by minorimperfections in the engine block machine surfaces at the oil coolerinterface that may allow engine oil seepage past the oil coolerO-rings. To cure this problem, GM offers the following information: 1.Inspect for other oil leaks that may be perceived as an oil coolerleak. An oil leak from one of
Finding Common Ground for Measurement Disagreement
The problem with all these methods is that while each is good in itsown right, there may be a bias seen among them. Each method has someslight variations that can cause differences in result. It may bedifferent gaging force, different process methods (such as thedifference between contact and air gauging), or different measuringtechniques such as
Benefits of Water/Methanol Injection
Some companies such as Snow Performance and AEM are now offering easy to install water/methanol injections systems that are available for naturally aspirated or forced induction gasoline and diesel applications. These systems inject a roughly 50/50 mixture of methanol and water into the engine using a high-pressure pump. This mixture allows for more ignition timing,
Making Combustion Chamber Molds
Ross Pistons recommends the following process to make a combustion chamber mold: • Clean both the chamber and head surface; chamber must be free of all dirt, oil and grease, and valves must be installed. • Place cylinder head properly on the block using no head gaskets. Snug cylinder head bolts or studs with dowel
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
Identifying Six Common Fastener Failures
While few engine builders have access to sophisticated analysis equipment, a standard Bausch and Lomb three lens magnifying glass will generally show 98% of what you want to see. Several of the photos have been taken utilizing a scanning electron microscope (SEM) and are presented to simply illustrate typical grain configurations after failure, according to