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Old 07-06-2010, 02:33 PM   #1
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Question Increased PSI resulting in engine working harder? Discovered Dent in oil pan

Well, for rolling resistance improvement I just increased my PSI to 40 on my front and 36 on my rear tires(manual calls for 35/32; max allowed on current tires 44/36)...but I didn't like the strain on the engine. Just those 4/5 PSI added on each the front/rear respectively, it had the engine shimmering when under full load(VTEC) w/ AC a little earlier. It definitely felt like the engine was working harder anyway.

So, with the amount of miles on the car and not being on a full synthetic yet, I'm just not sure if I want to do higher PSI until I go full-syn for at least 1 oil change interval if its going to cause my engine to work this hard.

Also, my oil pan has a relatively small dent about 2-3 inches from the front bottom lip on the oil pan leading towards the back/drain plug. I could take a pic later. Previous owner probably ran over something. Anyways, it looks like it has a small scar about 1-2 inches in the center of this 'dent'(perhaps a small 1/2 inch of pan is raised upwards toward engine block). Since its not level across this may be causing some of the seepage I'm having of oil, or not. I sorta want to replace the entire oil pan now. The scar in the center of the dent is bare metal, no longer the black coating.

Thoughts on PSI and increased engine wear? Sure, it wouldn't hurt if no VTEC or full-engine load, but I want to be able to drive the car hard at times if I need to without second thoughts of my engine wearing faster.
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Old 07-06-2010, 04:29 PM   #2
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I don't understand. How would increasing your tire pressure increase your engine load? It doesn't make sense, and I've never heard of it working that way for anyone. My guess is that it's a coincidence with something else or your perception is off.

If it somehow is increasing the load on your engine, then it will decrease your fuel economy. In that case you'll definitely want to stick with normal pressure.
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Old 07-06-2010, 04:32 PM   #3
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I was thinking the same thing as theholycow.
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Old 07-06-2010, 04:59 PM   #4
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increasing tire pressure is in no way related to how the engine is operating. fact.
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Old 07-06-2010, 05:54 PM   #5
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100% impossible for increased tire pressure to increase the engine load. Like HC said, it's a coincidence with something else going on or your perception is off.
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Old 07-06-2010, 06:01 PM   #6
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maybe there is something up with his axles or CV joints. When you add enough pressure, it changes the relative position between the transmission and the wheel, causing it to act funny. I have no idea as it's speculation but it does seem strange that adding air could even cause such a thing.
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Old 07-06-2010, 06:46 PM   #7
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I've been running 45 psi on my vx(I think the tire max is 44), and it works fine. The increased pressure does make the bumps harder.
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Old 07-06-2010, 10:47 PM   #8
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Wow, you guys are completely spot on. I know my outer tie rods need replacing and its probably out of alignment. My thoughts were along the lines of it feeling like a rougher ride just after inflating some. I suspect that isn't much of a change in hindsight to have affected engine performance in the way I was suggesting.

Really I'm having problems with another area happening all together here. My car has been acting differently since I put on my new drive belts. It kinda 'shutters' and the idle RPMs will drop below that 500 mark and I hear this 'click-click-click' or 'tick-tick-tick' sound; if you will, coming from the transmission/clutch(behind the radiator/fan to the passenger side of engine bay)?

My battery was recently discovered to be low on fluid, though, and as mentioned new drive belts were installed just after topping off the fluid. Though, battery acid wasn't added, only distilled water so my mixture is probably at a low-acidity level. I had to jump start a 6 cylinder Honda van the other day, perhaps 2 weeks after I had filled my cells back up. That was only a week after the radio reset the time again. I'm trying to do longer trips and wait to use the AC until I'm well into a trip.

Perhaps the feel of the car change is to do with an electrical problem? The alternator or battery not able to keep up with energy demands when AC running or like tonight the sound was when idling in the driveway after returning home. Headlights, AC on, and in neutral w/ park brake applied. I popped the hood and got out to listen for the clicking sound's location, as the compressor kicked on/off and both fans were running/drive belts making their own 'norm' noise. I surmised it to be coming from the tranny clutch, but why would the transmission or clutch be making clicking sounds while parked?

I've checked all of my fuses under the hood and under the instrument panel, they seem good. At first I thought the 80A Battery fuse might have been blown under the hood, I guess its the only one of those kind that have a black colored wire thingy(lol its late) instead of a copper one? At least when compared to the other fuses with 30A+ in that fuse box next to the battery. I took some pictures earlier of the engine with a HD camera. I'll post them up later.

I've only had the M/T fluid changed for less than 10k miles. I learned how to shift without the clutch, as this is my first manual, but only ground the gears 2 times in that process and didn't force it afterward. I don't actually drive that way, but wanted to learn how to do this(shift without the clutch). Yes, I still use the clutch. Could that have thrown my tranny off somehow? It has a different feel while shifting normally now. Not as smooth as before trying the 'no-clutch' thing. I don't have much experience working on a car, but I don't have any problem wrapping my mind around technical things and I'm trying to avoid going to the mechanic for that unless I have to.

The symptoms seem to occur with heavy acceleration or electrical load. So, I don't think the timing is off and I get good compression/performance overall.

I may just need to bite the bullet and get a new battery. I wanted this one to last until the winter, though.

Any thoughts? Could this just be a weak battery?
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Old 07-07-2010, 03:12 AM   #9
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most likely you have several things against you... the worn out tie rods and poor alignment that will inevitably result will have your tires trying to go down the road sideways. a battery that is low on water could be a sign of an overcharging alternator. These two alone can make the car feel sluggish but combined they will make it feel like you are trying to push a wall.
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Old 07-07-2010, 05:40 AM   #10
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Quote:
Originally Posted by add|ct View Post
My battery was recently discovered to be low on fluid, though, and as mentioned new drive belts were installed just after topping off the fluid. Though, battery acid wasn't added, only distilled water so my mixture is probably at a low-acidity level. I had to jump start a 6 cylinder Honda van the other day, perhaps 2 weeks after I had filled my cells back up. That was only a week after the radio reset the time again. I'm trying to do longer trips and wait to use the AC until I'm well into a trip.

Perhaps the feel of the car change is to do with an electrical problem? The alternator or battery not able to keep up with energy demands when AC running or like tonight the sound was when idling in the driveway after returning home. Headlights, AC on, and in neutral w/ park brake applied. I popped the hood and got out to listen for the clicking sound's location, as the compressor kicked on/off and both fans were running/drive belts making their own 'norm' noise. I surmised it to be coming from the tranny clutch, but why would the transmission or clutch be making clicking sounds while parked?


I may just need to bite the bullet and get a new battery. I wanted this one to last until the winter, though.

Any thoughts? Could this just be a weak battery?
Quote:
Originally Posted by philip1 View Post
a battery that is low on water could be a sign of an overcharging alternator. These two alone can make the car feel sluggish but combined they will make it feel like you are trying to push a wall.

Oh crap... OP, you majorly messed up!

Get this:http://www.amazon.com/Black-Decker-V...pr_product_top

and charge that car battery! You battery is obviously severely discharged and needs to be charged up again. Problem is, you added water and you should never add water to a fully discharged battery because when you charge the battery, it's going to overflow. Get that battery charger and charge that battery up because it's unreasonable to expect your car to fully charge a discharged battery. I've seen far too many cars with partially or fully discharged batteries, on the brink of not working at all, I then charge the battery and everything is well again. Your battery is probably fine, it's just that it needs to be charged.

If you get that battery charger which I highly recommend because it's a "smart" charger unlike the sears diehard garbage, charge your battery at no higher than 6a. On batteries like yours, I prefer using 2amps but that takes well over 28 hours to charge, but if you care to do everything you can to preserve your battery, I'd do the latter rather than the former. Another FYI is that MOST battery chargers won't charge a battery with a voltage less than like 7v because that causes it to think you've either got the wrong battery hooked up or that there isn't a battery hooked up at all. The solution to this is to hook up another battery with proper voltage (like 12v) in parallel to the battery needing to be charged and then charge with this setup for like 2 hours, then disconnect the battery that doesn't need to be charged and continue with charging..

I've recovered batteries with voltages as low as 0V back to perfect working order again, just be patient and it should work out. A few things to look out for is to see if the battery is bulging on the sides as you charge and on your first charge, if you hear "boiling", I'd ease up on the charge rate or continue with that charge rate for like another hour, disconnect and then come back the next day and resume charging. There will definitely be "boiling" when charging a battery that is half full and this is ok, just don't charge at too fast of a rate. These battery chargers work great, it's just that they're also working hard not to cause a fire hazard or to damage your battery.

I've charged well over 30 car batteries, about half of them with a battery voltage less than 3V. Your battery is obviously not as low as 3v but it's more than likely fully discharged (less than 11.8V).

You cannot reasonably expect your car to fully charge that battery up to 100% (this is important) unless you plan on driving for like 28hours straight. I know this because the battery in my sister's Volvo was at 11.8V and I had driven on the highway for 4 hours straight, came back, waited for the battery to cool down (this takes at least 12 hours!) then measured the voltage only for it to be 11.9V and not 12.65V for a fully charged battery. I charged that sucker up and its current voltage is around 12.3v, which while not great, is expected of a sulfated battery.

If you're interested in knowing more about batteries and charging them, check out this site as it explains a lot.
http://batteryuniversity.com/partone-13.htm


One more thing:
Make sure your battery terminals are clean and when you charge the battery, while it's ok to charge with the car still attached to the battery, this could depress the voltage slightly and not let the charger get a good idea as to the condition of the battery.
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