Hydraulic Lash Adjuster Noise on 1990-93 Mazda 1.6L DOHC
This condition may be caused by restricted oil flow throughthe hydraulic lash adjusters (HLAs). The noise is common after cold engine starts or when returning to idleafter highway driving speeds. To correct the noise condition, HLAs havebeen modified to increase oil circulation. If a customer complains ofHLA noise and the engine is within specified range,
Measuring Valve Spring Retainer Height
There has never been an industry standard to compare the relationship of retainer heights with each other, although some manufacturers have previously listed its retainer heights by comparing them with each other. This has been somewhat helpful if you have at least one of the retainers on hand for comparison purposes, but doesn’t properly address
Selecting the Correct Filter to Prevent Lean-Out and Pump Failure
Aeromotive recommends the filtration media to be used on the inlet side of a fuelpump be no smaller than 100-micron and must have an element surfacearea of 60 square inches or more. Any filter element not meeting thesecriteria may fail to flow the full volume of the pump being used,resulting in cavitation at the pump
Revised Cylinder Head Bolt and Torque Procedures for 88-95 Ford 5.0L Engines
The two types of bolts that are used are physically different as you can see in Figure 1. The standard torque bolt is a non-flanged hex head bolt. The torque to yield bolt is a flanged head bolt. Both types of bolts may be used on any of the 5.0L engines. The bolts must all
Coolant Leak from Front Right Side of BMW M52TU Cylinder Head
Situation: Cylinder heads with a machining flaw (hair line crack) may have beeninstalled on M52TU engines in production on a limited number ofvehicles. The machining flaw (if present) is located in the front rightside of the cylinder head and will cause a coolant leak in the area ofcylinder 1 as shown in the illustration (Figure
Whine, Whistle, Ringing Noise Complaints on 2004-2005 Cadillac 3.6L Engines
Models affected: 2004-2005 Cadillac CTS, SRX; 2005 Cadillac STS with 3.6L Engine (VIN 7 – RPO LY7); and without Heavy Duty Cooling (RPO V03tV92). This bulletin has been revised to add additional information oninspecting the crankshaft harmonic balancer. Other complaints of afaint engine whine-type noise have been reported at speeds of 0-30 mph(0-48km/h) at 1,000-2,500
Gaining Performance from Ignition Timing
The cool thing about ignition timing is you can usually get a considerable performance increase for little or no money. But, some time and effort will be required. Let’s start with a simple explanation of why we need spark advance and how much of it we want. First – When you hook up the timing
Revised Oil Pan Gasket for 1986-2001 Ford 3.0L ‘Vulcan’ Engines
The old bolts must be replaced with the new ones. The new-formed gasket should be installed by placing it on the oil pan rather than gluing it to the block. The bolts will still have to be torqued twice during installation and once after the engine has reached operating temperature. The torque value for the
Steel Compression Rings with Reduced Radial Wall Thickness
MAHLE Clevite Inc. is in the process of transitioning its ring sets from a grey cast iron top rings to a carbon steel top rings. They say the advantages include 35% more strength, 30% less weight and double the resistance to side wear which is a common problem on late-model engines. The net result is
Coolant Leak Caution on 1995-2003 Nissan 3.0L, 3.5L Engines
CONDITION: A severe coolant leak from the water pump’s weep holes causes the coolant to destroy the pump’s bearing as well as leak into the engine’s oiling system. Catastrophic engine failure can result. CAUSE: This engine’s water pump is buried beneath the timing cover since it is internally driven off the engine’s timing chain. Since
The Importance of Compression Ratios and How To Measure Them
NHRA Top Fuel and Funny car teams replace them after every race pass and every second qualifying pass. Pro Stock teams replace them after every 40 passes approximately, and weekend warriors replace them every 12 to 18 months, sooner if their engines are nitrous-assisted. At piston replacement time questions of spec changes usually arise –
AVI Offers Cummins 5.9L and 6.7L: Issues And Review of Operations Training Program
TonySalas, director of training for Association of Diesel Specialists, will informyou about the EGR system along with the close crank case ventilation system,the after treatment system, the emission control system and the common railinjection system.?? Salas covers scan tool software to give you the information?and diagnostictechniques you need to know on how to approach the