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V6 engines I've seen usually have a cavity just under the intake runners that will hold a fluid until it is entirely dried and crusted up. If you spray anything on top of the engine it will pool around your fuel injectors. If you drive it will slosh around and over your valve covers, and I've...

One thought. If the filter is removing wear metals that are normally counted in a UOA, how do you know the actual wear numbers? For instance, what if you were actually getting worse wear, but didn't realize it because the metals were being filtered out? Also, where on earth do you find toilet...

Lots and lots of Duraturn tires around here, sold by a local store. Made by Yanchang Rubber.

I've also seen one with multiple restrictors instead of an element, but haven't come across anyone actually mentioning they needed to use one or the other restrictor, or how to choose the restrictor. https://smile.amazon.com/Vibrant-11...0AQ7972O/ref=psdc_15730891_t4_B07G89F857 EDIT: some cars...

I have the P0420 code on two vehicles and don't need to pass emissions. I have seen these things on Amazon: https://smile.amazon.com/s?k=mini+catalytic+converter&page=2&qid=1594229187&ref=sr_pg_2 This makes me wonder if there is something wrong about the traditional O2 anti-fowler mod. I would...

After thinking about this, I think the valve noise change was mainly from temperature differences. I still want to investigate the exhaust noise vs combustion efficiency angle.

Yes, it wasn't subtle. Approaching the car with the hood open, the first thing you would hear would be the valvetrain noise. Now you have to listen for it. Human ears aren't good at discerning absolute levels but when one sound is louder relative to another you're much more likely to hear a...

I've changed spark plugs on a few different cars and I've noticed the idle engine noise changes. For instance on an Acura 3.2L J32A1 engine, The exhaust was boomy and the valve ticking was clearly audible. I did nothing but change the spark plugs, and now the exhaust is no longer boomy and...

It might even be illegal to keep driving it: https://mechanics.stackexchange.com...-this-tire-is-it-safe-to-drive-on-at-all

Originally Posted by MolaKule If you model the tips and gaps as two coequal but very low resistive electrical branches, the currents divide for the two but we have essentially the same potential across the gaps in order to maintain conservation of energy.. Except this is a highly nonlinear...

I see the photograph, but photos of sparks are not reliable; the flame core graphic on the other hand shows a spark on just one side. We don't know how long the shutter was open and how many sparks occurred during that period. I also think there must be a motivation to show the sides as both...

I don't think the spark takes both sides at once, this is not usually how sparks behave (the first spark leader to touch both electrodes fires and shorts the other leaders) and the NGK diagram shows the spark on one side. I would think that there would be a wear-in period with the spark favoring...

After some searching, Polyisobutane appears to be a misnomer in a 2-stroke oil writeup. Polyisobutene and polyisobutylene are the same thing and are both PIB. PIBA is polyisobutene amine and is a detergent/dispersant like PEA. PIB is a weak cleaner that is more of a deposit controller than a...

I didn't see anyone talking about this. I picked up a bottle of this off the shelf. On the website no pictures of the back are shown, and I couldn't even find a SDS for in Oreilly's system. However the search results claim it to be a Lucas product. Here is the blurb on the back, which I found...

I probably shouldn't have used the term energy. I realize instantaneous power is different from power over time. What I meant was, there is no way an ignition coil at 18KV is pushing 200A through 10kohms worth of plug and wire resistance, that would require far more voltage. That current can...

My thinking is that molecular attraction means no level of polish will reduce drag on the oil below a certain level. Only a different material could do this. Perhaps some surface treatment that makes oil tend to bead up and roll off. I'm suspicious of the utility of extreme polish levels though...

Wow, that is so much interesting information. Do you think the arc shape changes depending on which side of Paschen's law it falls on? For instance if the gap is small enough to increase the breakdown voltage significantly, do the arcs tend to bulge out and take meandering paths? If this is the...

Are you saying the sealing around the center tube is not critical? I am going to connect everything together with 1/4" hose and 1/8NPT-to-slip-fit adapters with fuel line hose clamps. Just out of curiosity, does anyone else suspect that the whole toilet paper compression thing was just a...

I got some of that, but it was only 4" rolls. It could be that the dollar store I bought it from gets a pared down version, which is common for dollar stores. I've been eyeing Boardwalk 6155 as a possibility if I can't find any in local stores.

I managed to come across a Motorguard oil filter. It has a metal mesh in the top half although I can't see what it was for. After removing the mesh a standard toilet paper roll presses over the bulge in the center tube top half nicely. However there is no such fitting in the bottom half, it...