Panelman: Well, that depends on who you ask. All O2 sensors are not the same quality. Wrong question though.
A better question is, "Considering my 11 year old Audi V6, what is the best value for my dollar that will function properly and "chances are" won't cause any further issues? If...
Patprimmer: I just found something interesting about H2S.
According to this:
http://www.atsdr.cdc.gov/toxprofiles/tp114-c3.pdf
H2S has an odor threshold of .5 ppb. (that's parts per billion which is very very low) In another report I found that concentrations over about 100 ppm (parts per...
Panelman: Yep, if your O2 sensors are the originals, chances are they're tired, especially if you have noticed a recent decline in fuel mileage and the engine uses more than about 1 qt. oil per 1500 miles. According to Bosch, they are 100,000 mile maintenance items. Don't wait too long, on V6...
Assuming you mean how often per second the ECU - O2 sensor feedback loop should tweak the mixture lean/rich/lean . . . that causes the O2 sensors voltage swing . . .
Older type single wire unheated O2 sensors should cycle at least once per second with the engine at idle provided the O2 sensor...
Pat writes:
It should be borne in mind that H2S is also quite intoxicating and toxic.
You might be wise to look up an MSDS on it.
From memory, it initially smells real bad, but as we become affected, the smell reduces, we get a sweet taste under the tongue, and become intoxicated, then...
Franz writes:
. . . . . . Leave anything out? Franz
Yeah. Reality, experience, education, and a conclusive, repeated, demonstrated history of performance. The "Tornado" design team doesn't have any of it.
If none of the above, . . . . matters to you, you should invest your life savings in...
Careful Pat. If you keep writing like that, you might end up with a reputation like mine! It's not really a problem though. A few months in exile (call it a vacation if you prefer) usually repairs it!
Chumley
Metalguy. Yeah, that's true. It is the catalytic converter that actually creates and stores most of the H2S and under certain conditions, releases it in quantities that you can smell. Remember that in 1975, that was the industries first shot at getting the converter technology to work. It's...
The reduction section in your catalytic converter, the part that changes NOx and some CO (carbon monoxide) back to N2 and CO2, also has the tendency to start absorbing SOx, or oxides of sulfur when its internal temperature drops below about 500°C. As Pat stated, sulfur is a natural contaminate...
Depending on where in the world you buy fuel, often both #2 diesel and unleaded gasoline are between 20% to 40% identical aromatic hydrocarbons. Gasoline tends to have the remainder of the mix in the smaller C5 to C8 hydrocarbons and up to 15% oxygenates (alcohols, ethers) while diesel fuel has...
These links don't have everything you are looking for and they're no substitute for The Blue Book, but, it's a start in the right dircetion:
http://www.me.mtu.edu/~slpost/CLASS/hcprop.html
http://www.fao.org/docrep/T4470E/t4470e08.htm
Chumley
Graviman writes:
"Funny how a lot of folks are going back to chains. Wonder why?"
No, I don't either. Of course, today, with cell phones, OnStar, GPS, the internet, great warrantys, ECU's, ABS, airbags, Homeland Security, HMO's, and Medicare, you can agressively charge out into the world...
Smokey: Pontiac I6 engines, Chevrolet (Vega), Ford (Pinto) all used timing belts in the late/early 60's/70's with minimal belt problems.
Your're right, belt based blocks and heads aren't "necessarily" longer, but we're not discussing any specific applications. Compare a few similar...
Timing belts require no lubrication and don't add wear particulate to the engine oil. Because of that, the front of the engine block and cylinder head(s) can be shortend up by about an inch as opposed to using a timing chain or gears which require sealed lubrication. Timing belts usually...
Guys, please, lets take a look in reality.
turbinator writes to:
SBBlue:
I think you assumed the expansion across the throttle is isentropic, which is far from the case. A turbine, with high isentropic efficiency will take energy (heat) out of a fluid stream and turn it into shaft work...
You really don't have to reinvent/redesign the wheel. Water cooled cars with radiators have been in existance for over 100 years. Just go and look at a similar sized car with a similar sized engine. (engineers have all ready solved the problem for you) What size radiator is in there? There's...
Yes, that is possible, but, this post, most likely, will be of no help to you at all. Different aluminum alloys heat treat (increase in hardness) and anneal (soften) at different temperatures using different, very specific methods. Without knowing what specific alloy you are referencing...
Cymeryss:
Many ECU controlled engines (that must meet emission control requirements) try to limit the coolant inlet (or radiator outlet) temperature to what I mentioned above, but it can and does vary.
4 to 9 gallons per minute of flow could be considered typical for steady state mild power...
Cymeryss:
What do you mean by "typical coolant flow rate?"
Are you looking for the maximum flow rate while climbing a steep grade with the thermostat wide open at red line with the AC on when it's 110°F ambient, (the flow rate varies based on engine load, outside air temp, rpm, and a few other...
"I would caution very strongly about discarding the 'pump pre filter'."
Well, yeah, of course, I would too, but if the vehicle manufacturer, in agreement with their vendor(s) says to do that . . . . then puts it in writing and distributes it as a TSB world wide, chances are they didn't base...
