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Also called variable valve actuation (VVT), variable-cam timing and variable valve timing and lift electronic control (VTEC) Engines with Variable Valve Timing & Lift Valves control the flow of air and fuel, into the cylinders and exhaust out of them. When and how long the valves open (timing) and how much the valves move (lift) both [...]
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Variable Valve Timing & Lift (VVT&L)
August 29th, 2009
Advantages of single overhead camshaft engines (SOHC)…..
May 31st, 2009
Finishing up the What is a Single Overhead Cam Engine post:
The main advantages of SOHC Engines Compared to DOHC Engines
A single overhead camshaft set up basically represents a simpler version of the more complex dual overhead cam engine. As indicated in its name, a dual overhead cam uses two camshafts per bank of cylinders [...]
Continuation article on catalytic converters…
May 28th, 2009
Part-2 continuation post from yesterdays ‘Cat’ post.
On 1996 and newer vehicles that have On Board Diagnostics II (OBD II), there is a “catalyst monitor” that monitors the operating efficiency of the converter. A second oxygen sensor is mounted behind the converter to compare oxygen levels in the exhaust before and after the converter.
Under normal operating [...]
What is an engine ‘camshaft’ and what does it do?
May 26th, 2009
A camshaft or ‘bumpstick’ as it has been known as in the automtive field is a shaft with eccentric lobes on it. The camshft is driven by a chain, gears or a timing belt and the eccentric lobes move the valves in the head up and down in the proper sequence. Â
Some engines use pushrods [...]
What is a naturally aspirated car engine?
May 19th, 2009
Naturally aspirated engines are simply internal combustion engines that are not assisted with a turbocharger or supercharger. Some strategies on making more power.. Large power increases in automotive engines are not hard to get. Four stroke performance can be greatly improved over the well mannered factory setup. Four stroke tuning can greatly improve the power [...]
DIS-Distributorless Ignition Systems…
May 14th, 2009
If you have the mechanical ability and tools, here is a post by GotEngines.com on DIS and some diagnostic tips. Other wise go to a competent repair shop with qualified mechanics.
Distributor less ignition systems (DIS) have been around for almost a decade now, and have eliminated much of the maintenance that used to be associated [...]
DOHC in engine speak, stands for Double OverHead Camshafts…
May 7th, 2009DOHC
Continuation Article on Hand Held Code Readers and Automtive Scanners..
March 11th, 2009
Continuing the last article on hand held code readers:
No what what, if it your engine strategy comes down to a new engine, GotEngines.com has a great variety to choose from. A pre-tested low mileage used engine can be a reliable and affordable choice for many applications. Obviously rebuilt engines are quite popular and affordable.
With [...]
I Use To Think An Automotive Code Reader Was..
March 9th, 2009
Silly. When I owned my own repair shop, I had the arrogance to think that inexpensive hand held automotive code readers were a hoax. It is easy to get cocky after owning a very reputable and competent repair shop for 25 years and having an array of the most technologically advanced and expensive automotive scanner-code [...]
Ignore Your Timing Belt, Buy a Replacement Engine..
February 26th, 2009
All internal combustion engines have a timing belt or some way to connect the camshaft with the crankshaft in an engine. Other methods include timing chains and timing gears. I feel a brief tutorial on timing belts may help many people from having to buy a used engine someday. Obviously there are other engine choices should [...]
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