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Tech Notes

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Problem: Premature failure of supercharger bearings. Cause: When the belt tensioner starts to fail, belt tension...
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The two methods of adjustment are internal (dry) setting and the external (wet) setting. The internal float adjustment is accomplished with the fuel bowl...
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A 4-cycle engine is far from being a simple air pump. The principle reason turning apparent simplicity into real world complexity is the dynamic...
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Here is some good, basic information about how to properly install connecting rods. Step 1:     Apply the...
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Chrysler replaced its old SOHC four cylinders with an all-new family of SOHC and DOHC engines in 1995. There were 2.0L SOHC and DOHC...
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If you receive customer reports of oil seeping from Mercedes vehicles equipped with M272/273 engines, the cause could be the round plastic expansion plugs...
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Since the least common result of valve failure is the valve itself, it is always necessary to determine the cause of failure prior to...
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By Fergus OgilvyAssemble the valve locks on a valve and using your thumb and forefinger raise the retainer to its full height....
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Performance intake manifold manufacturers offer several different options to get air and fuel from carb to heads. The secret is choosing the right intake...
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This bulletin involves rotating all ­engine exhaust valves, replacingthe valve spring retainer locks with a new design to increase valverotation at lower rpm, inspecting/replacing...
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The most common oil leak on ’90-’93 4.0L engines is often diagnosed as a rear seal leak, but in most cases, the problem is...
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1. Synthetic motor oil is too slippery. It causes roller bearings to slide instead of roll, and that causes the bearings to fail.
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This bulletin applies to Chyrsler models equipped with a 6.1L engine with an engine serial number of TNXE6026620001 or less. Theengine serial number can...
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This repair procedure involves applying a thin bead of RTV to theintake manifold-to-throttle body joint.This information applies tovehicles equipped with a 3.7L engine built...
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The clearance inside the combustion chamber is reduced when the engine block surface or cylinder head surface has been resurfaced. The reduced combustion chamber...
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Use the repair procedure below to diagnose and correct this condition. Repair Procedure1. Inspect the location where the Bank 1 cylinder...
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The material worn off all goes to the oil pan where some is washed out during the oil changing process, but a portion goes...
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Reviews of these problems, which are leading to breakage of the valves, and in some cases catastrophic failures, are related to problems not with...
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By Sam Logan Using aluminum sheds 10-15 lbs. from the rotating assembly of a conventional steel flywheel, but it is the effect...
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By Matt Dixon, assistant professor, Southern Illinois University Vehicles with variable valve timing (VVT) have become commonplace over the last decade. Even more commonplace are...