Tech Tip: 1987-93 Jeep 4.0L: Head Gasket Leaks/Seepage Found in Engines
Some vehicles equipped with a 4.0L engine, may experience engine oil leaks/seepage from the head gasket along the right-hand side (tappet rail) of the engine.
Tech Feature: Taking it to the Streets
We have all seen in our industry that a “streetable” racing engine or a “raceable” street engine appeals to a broad spectrum of potential engine buyers because of its flexibility. Yet, everyday street driving is not the same thing as serious drag racing.
Tech Tip: Honda’s V6 Engine Leaks Oil from Front/Middle/Rear
If oil is leaking from the front, middle or rear of one of the above engines, it may be due to the cast aluminum engine block may be porous in spots. Depending on the location of the leak, seal it with JB Weld or 3-Bond-coated sealing bolts.
Tech Feature: Valve Timing Terror Tales
While a lot has been written about timing belt replacement intervals, not a lot has been written about diagnosing timing belt and valve timing-related driveability complaints. In this article, Gary Goms reports that he is beginning to see more driveability problems caused by faulty valve timing.
Tech Spec: 100 Years of Changing Internal Combustion Technology
It would be interesting to hear what Nicolaus Otto, credited as the father of the first functional four-stroke IC engine, would say after seeing some of the advanced powerplants dropped into vehicles today.
Tech Feature: The Variables of Valve Timing
Today’s cylinder deactivation designs are used to reduce the fuel consumption and emissions of an internal combustion engine during light load operation.
Tech Feature: Northstar Supernova
Introduced in 1993, GM’s 4.6L 32-valve dual overhead cam all-aluminum V8 engine – housed in the Cadillac Allante, Eldorado and Seville STS – was considered a quantum leap forward for U.S. automakers. Initially rated at 295 horsepower, the Northstar V8 has grown over the years to an incredible 469 hp at 6,400 rpm (STS-V Supercharged Northstar engine).
Mitch Schneider: How to Pass the ‘Reasonable Man’ Test
We’ve been doing a fair amount of restoration work lately. Certainly, more than we’ve done in a very long time: a 1962 red Corvette convertible (Like there is another color…), a number of vintage ’50s and ’60s Cadillac Coupes and Sedan De Villes, a few early ’50s Roadmasters, a couple of classic ’60s Mustangs, a 1931 Oldsmobile (I know…How did that one sneak in there?) and more.
Pennzoil Introduces its Most Advanced Synthetic – Pennzoil Ultra
New Hyper Cleansing Technology keeps engines closer to “factory clean” to help consumers protect their vehicle investment and increase engine efficiency.
Tech Feature: Engine Technology Gets a Boost
As a technician, you’ll need to understand how Ford’s EcoBoost turbocharged gasoline direct injection engine works, since the automaker plans to incorporate it in 90% of its new vehicles over the next three years.
Tech Tip: How Can You Tell if a Head Gasket is Leaking or Has Failed?
The first symptoms of a head gasket that is failing are usually a slow loss of coolant with no visible leaks, engine overheating and/or a Check Engine light with cylinder misfire codes.
Tech Tip: Hyundai Sonata Runs/Idles Rough/ DTC P0335 Set/MIL ON
This TSB has been revised to add a procedure to index the oil pump/balance shaft sprocket. Not properly indexing the sprocket may cause an engine vibration mostly noticed at 3,500-4,000 rpm.