engine Archives - Page 5 of 70 - TechShop Magazine
GMB North America Celebrates 70th Anniversary, Plans To Launch Fan Clutch Line At AAPEX

GMB North America has announced it will be participating once again in AAPEX this year, Nov. 5-7 at the Sands Expo Center in Las Vegas. To bring its 70th anniversary year to a close, GMB will be launching its full fan clutch line at the show. GMB offers parts for most European, Asian and domestic built vehicles.

Diagnostic Solutions: Nissan Pathfinder Wouldn’t Crank

Recently, an old customer called to tell me his 1988 Nissan Pathfinder “fishing wagon” wouldn’t crank. The Pathfinder’s battery was less than one year old and passed a preliminary conductance test with flying colors. The Pathfinder’s starter activation system is typical for many import vehicles of this vintage. In the manual transmission version, the ignition switch supplies power to the clutch switch relay windings when in the crank position.

Chevrolet Malibu Suffers Engine Hesitation, Stalling Or RPM Drop

Some customers may comment on the engine having a severe hesitation or a drop in RPM during parking lot maneuvers or during a deceleration. In a few instances, customers may comment on occasionally experiencing a stall at idle when the engine is fully warmed. The engine cooling fan may be inducing a voltage spike that affects the ignition system.

Kia Experiences Hesitation/MIL On, DTC P0123

Some 2001-’06 Optima (MS) models produced between Oct. 7, 2000 and Aug. 31, 2005, equipped with the 2.5L or 2.7L (V6) Delta engine and some Sportage (KM) models produced between Oct. 28, 2004 and May 18, 2007, equipped with the 2.7L (V6) Delta engine are applicable for this bulletin.

Performance Rocker Arms

Overhead cams have been used in many European and Asian engines for years, so when Ford opted to go the overhead cam route with their 4.6L V8 engine, some predicted pushrod engines were on their way out. But, GM stuck with the pushrod design for their LS engines as did Chrysler with their 5.7L and 6.2L Hemi engines. When you add in all the older engines and current aftermarket block/head combinations that still use pushrods and rocker arms, it’s easy to understand why rocker arms and pushrods are still a hot topic for performance engine building.

Tech Tip: Nissan KA24 SOHC Engines

Many of you may have not seen this issue, but once it bites you, you will always remember the Nissan KA24 engine series in the SOHC configuration. When the timing chain, guides and tensioner get high miles and wear, the chain can actually start rubbing against the front of the block.

Mazda Tech Tip: Diagnosing Body Vibration At Cruising Speeds

Some vehicles may experience a body vibration when driving approximately 55 mph. This symptom is due to the characteristics of the No. 3 and No. 4 engine mounts. Modified No. 3 and No. 4 engine mounts have been established for service only. Customers having this concern should have their vehicle repaired using the following repair procedure.

Problems That Plague Chrysler’s 3.5L Engine Create Rebuild Opportunities

If ever there was a service opportunity ripe for the taking, Chrysler’s 3.5L SOHC V6 engine (and its 2.7L, 3.2L and 4.0L cousins) is it. This engine was introduced back in 1993 as an “upgrade” from the earlier 3.3L pushrod V6 engine. Some would question whether the move was a step forward or backward because the 3.5L V6 (and its variants) has a poor reputation for reliability.

New 2014 Dura-Bond Catalog Available

The new catalog features many new applications complete with photos, competitors’ interchange, conversion reference charts, and a powder metal valve seat technical information and installation instruction manual.

8 Common Diagnostic Mistakes

Many diagnostic mistakes that become “diagnostic dilemmas” are caused by basic oversights or incorrect assumptions on the part of the technician. Research time and testing time have become the cornerstones of modern diagnostics.

Audi/VW Direct-Injection Issues And Carbon Deposits

Through the years, injection systems have incorporated more sensors like air temperature, EGR temperature or exhaust gas temperature, and the emissions systems monitor how efficiently everything is working. But the systems didn’t change a whole lot until about 2006.

PCM Diagnostics Case Study: No-Code Misfire Diagnosis On A 1998 Toyota 4Runner

When doing mobile diagnostic work for other shops, contributing writer Gary Goms usually sees more than his share of random no-code engine performance complaints. In the following case study, the customer of a client shop complained about an intermittent rough idle on his well-maintained 1998 Toyota 4Runner, but only when it was driven in hot weather. The client shop couldn’t duplicate the complaint, no matter how long the engine ran. Of course, the lack of DTCs didn’t help the diagnostic process.