Tech Feature: Diesel Crankshaft Basics
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 aftermarket. Some preconceptions are factual, say experts, while others are unfounded.
Tech Tip: Whine, Whistle and Ringing Heard from Cadillac’s Engine
Some customers may comment on a whine, whistle or ringing-type noise from the front of the engine that increases in intensity as engine rpm increases. This noise is most audible standing in front of the vehicle with the hood opened. If the noise fades into the ambient engine noise by 2,000 rpm, refer to PIP3453 in the Service Information (SI) for camshaft drive chain noise.
Tech Feature: Balance Between Crankshaft and Related Components is Critical
Balancing used to be the exclusive domain of the performance engine. Stock grocery getters rarely were considered candidates for balance jobs. But that thinking has changed. Even standard, run-of-the-mill automobiles are sent from the OE with precisely balanced engines. And customers have come to expect nothing but the same when they look into having their vehicle’s engine rebuilt.
Snap-on’s New Software Bundle 9.4 Includes CKP Relearn Capability for 1998-2009 GM Vehicles
With Snap-on’s latest software upgrade, Bundle 9.4, professional technicians have the ability to reset the CKP when the crankshaft position sensor and certain other GM engine components are replaced. This capability is now available for a great number of 1998-2009 GM vehicles.
Z Sport, Part 1: Subaru WRX Performance Brake, Suspension & Engine Mods that Pack a Punch
A project car in the form of a WRX/STI shows that Z Sport in Everett, WA, is all about
Tech Tip: Multiple Cylinder Misfire or Rough Idle on Chrysler Models
This bulletin involves rotating all engine exhaust valves, replacing the valve spring retainer locks with a new design to increase valve rotation at lower rpm, inspecting/replacing the MAP sensor (as necessary), and decarbonizing the combustion
Bearing Down on Engine Damage
Internal engine inspections provide clues to bearing failures.
Tech Tip: An Economical And Effective Way To Refinish A Seal-Worn Shaft
Grooves from shaft wear can allow oil to leak out, which can result in bearing damage and failure.
Tech Feature: The Subaru Boxer Engine: A Balance of Power
According to their engineers, these high-powered engines are ideal for all-wheel-drive applications used in Subaru vehicles because they are inherently compact – short and low.
Tech Feature: Servicing Ford’s 3.0L Engine
The 3.0L Duratec V6 was introduced in 1996 to replace the aging 3.8L V6 in the Ford Taurus and Mercury Sable. Unlike its conventional pushrod predecessor, the 3.0L V6 has dual overhead cams, four valves per cylinder and an aluminum block with cast-iron cylinder liners.
Second Generation Repairs: Servicing the GM 3800 Series II Engine
The GM 3800 Series II engine, introduced in 1995, is quite a different engine from its predecessor, the Series I engine. While the stroke for the 3.8L engine remained at 3.4″ (86 mm), and the bore remained at 3.8″ (97 mm), the engine architecture changed dramatically.
Tech Tip: GM Drivers Rattled By Engine Noise
Some GM truck, SUV and minivan owners may complain about a rattle-type noise coming from the engine area at approximately 1,800 to 2,200 rpm. The rattle-type noise may be caused by torsional vibration of the balance shaft. To fix the problem, follow the service procedure below for installing a new tensioner assembly kit.