Chrysler Recommended Tire Pressure for P215/65R16



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Thread: Chrysler Recommended Tire Pressure for P215/65R16

  1. #21
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    Quote Originally Posted by dodgeariesguy View Post
    Here is an identical picture that our Automotive Service Technician textbook shows on tires,
    No argument with the pictures. With 36 psi in my Van's tires, I will wear the edges. 40 psi gives me more even wear. Likely 44 psi would cause more wear in the center. The vehicle Manufacturer's stated pressures tend to be a compromise for ride so they will naturally tend to be on the low side, ie wear the edges.

    With the Jeep it's a different story. 40 psi tended to cause the tires to wear in the center. I backed those off to 37 psi. It calls for 33 psi.

    This article makes interesting reading as to what those that teach driving skills, as well as others, think about tire inflation. Enjoy the discussion, it's educational.
    Last edited by Jeepman; 05-29-2010 at 09:17 PM.
    2007 GC SXT - Magnesium - S&G - 3.8L - 115,600 kms
    2002 GC Sport - Stone White - 3.3L - 314,240 kms
    2003 Jeep TJ Sport - 4.0L - 246,430 kms

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  3. #22
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    Quote Originally Posted by dodgeariesguy View Post
    Here is an identical picture that our Automotive Service Technician textbook shows on tires,
    This picture is for severely overinflated tires, inflated over the sidewall maximum pressure.

    Chrysler says 36. The tire says a max of 44. 40 is right in the middle, and for me is the magic number. I've ran 36, wore the edges of the tires (we do have lots of curvy roads here in the south). I've ran 44 and it road just a tad too rough (have no idea about tire wear as I put it down to 40 rather quickly). 40 is the best for me and my driving conditions.
    Jeff
    http://www.facebook.com/eddie.munster
    Current:
    2007 Grand Caravan/3.8L V6/103K mi/original 41TE
    2006 300C/5.7L HEMI V8/128/K mi/original W5A580
    2002 PT Cruiser/2.4L I4/139K mi/original 40TE
    1992 S-10/4.3L V6/249K mi/original 4L60E
    Previous minivans:
    1997 Grand Voyager SE/traded@192K mi/3.3L V6/original 41TE
    2003 Grand Caravan Sport/3.8L V6/traded@124K mi/original 41TE
    2007 T&C/3.8L V6/traded@44K mi/ original 41TE
    2010 T&C Touring/3.8L V6/the ex's@72K mi/original 62TE

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    Quote Originally Posted by Miron View Post
    I am running at 36-38 psi... over this range the ride becomes too much bumpy (depends on the quality of the roads) and I don't think it's healthy for all the suspension system...
    I used to run close to 40, but I also have backed it down to 35-36. I wonder if the FIVE sets of sway bar bushings I've gone through (and it needs two more, again) have to do with the over-inflated tires. Ours rides pretty choppy with 40 PSI in the tires; but pretty well at 36 PSI. If that means I only get 60k miles rather than 70k out of the tires, I'm okay with that.
    '11 Toyota Camry | 2.5/6AT | Sandy Beach
    '07 Chrysler T&C | 3.8/4AT | Cognac Crystal
    '05 Acura MDX | 3.5/5AT | Billet Silver
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    Quote Originally Posted by Hokiefyd View Post
    I used to run close to 40, but I also have backed it down to 35-36. I wonder if the FIVE sets of sway bar bushings I've gone through (and it needs two more, again) have to do with the over-inflated tires. Ours rides pretty choppy with 40 PSI in the tires; but pretty well at 36 PSI. If that means I only get 60k miles rather than 70k out of the tires, I'm okay with that.
    Jason you have checked the sway bar links, right? I've read your post about your excessive bushing wear before but have never thought to ask.

    With the DGC I can tell a small difference between 36 and 40. I can't tell a difference with the T&C.
    Jeff
    http://www.facebook.com/eddie.munster
    Current:
    2007 Grand Caravan/3.8L V6/103K mi/original 41TE
    2006 300C/5.7L HEMI V8/128/K mi/original W5A580
    2002 PT Cruiser/2.4L I4/139K mi/original 40TE
    1992 S-10/4.3L V6/249K mi/original 4L60E
    Previous minivans:
    1997 Grand Voyager SE/traded@192K mi/3.3L V6/original 41TE
    2003 Grand Caravan Sport/3.8L V6/traded@124K mi/original 41TE
    2007 T&C/3.8L V6/traded@44K mi/ original 41TE
    2010 T&C Touring/3.8L V6/the ex's@72K mi/original 62TE

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    Quote Originally Posted by jgbat View Post
    Jason you have checked the sway bar links, right? I've read your post about your excessive bushing use before but have never thought to ask.
    I wiggle them every time I change the bushes, and they don't wiggle. I can never reproduce any noise (in anything) when I rock the van back and forth. But you can hear it and feel it in the floorboard, especially on the passenger side when driving.

    Every time I change the bushes, it's all quiet for 3-5k miles, then it comes back again. I last did the bushes in January:

    http://forum.chryslerminivan.net/sho...hes#post151201

    Next time I change them (which will likely be this summer), I might completely REMOVE the links and check them carefully for play. I can never feel any. And I don't think play in the links would go away with new bushes, but maybe. I've even thought about struts and/or mounts, but since the noise goes away with each install of new bushes, I figure that's what it has to be.
    '11 Toyota Camry | 2.5/6AT | Sandy Beach
    '07 Chrysler T&C | 3.8/4AT | Cognac Crystal
    '05 Acura MDX | 3.5/5AT | Billet Silver
    '97 Dodge Dakota | 5.2/4AT | Emerald Green

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    Quote Originally Posted by Hokiefyd View Post
    I've even thought about struts and/or mounts, but since the noise goes away with each install of new bushes, I figure that's what it has to be.
    You've got a point...
    Jeff
    http://www.facebook.com/eddie.munster
    Current:
    2007 Grand Caravan/3.8L V6/103K mi/original 41TE
    2006 300C/5.7L HEMI V8/128/K mi/original W5A580
    2002 PT Cruiser/2.4L I4/139K mi/original 40TE
    1992 S-10/4.3L V6/249K mi/original 4L60E
    Previous minivans:
    1997 Grand Voyager SE/traded@192K mi/3.3L V6/original 41TE
    2003 Grand Caravan Sport/3.8L V6/traded@124K mi/original 41TE
    2007 T&C/3.8L V6/traded@44K mi/ original 41TE
    2010 T&C Touring/3.8L V6/the ex's@72K mi/original 62TE

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    Quote Originally Posted by dodgeariesguy View Post
    Here is an identical picture that our Automotive Service Technician textbook shows on tires,
    The pictures that you posted are good evidence of...
    ...absolutely nothing within the context of this discussion.
    If I was to inflate my tires to 80 PSI then sure, I could get them to look like the "over inflated" picture, and if I was to deflate them to say 15 psi, then yup, they'd probably look like the "under inflated" picture.

    The thing is, I don't do either of those things; what I do is keep them inflated (with air) to a few pounds above the stated specification (i.e. around 38 psi). The last two sets of 70,000 mile tires I swapped off of our vans went ~65,000 and still had plenty of tread left to have run a good ten thousand miles of more before the wear bars started showing (I replaced them in each case because Winter was looming large).
    Sold: 1998 DGC Sport 3.8 (Final odo: 178,000 miles)
    Sold: 1998 Chrysler T&C LXi 3.8 (Final odo: 190,000 miles)
    Sold: 2003 DGC ES 3.8 (Final odo: 172,000 miles)
    1998 Audi A4 Quattro (5-Speed manual)
    2001 Honda Accord EX V6 (4-Speed automatic)
    2009 Mazda3 i Touring (5-Speed manual)
    2012 VW GTI (6-Speed manual)

  9. #28
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    Mu old van (1988) was stating 35 and the T&C is stating 36. Keeping the pressure between 35-38 I never had any wear issue but going over I feel like driving on a stone paved road and every little something on the road is felt on the steering wheel, especially at city speed.
    2002 Town and Country LXI - 3.3L - 133,000 miles
    1988 Dodge Grand Caravan LE - 3.0L - 270,000 miles (Gone but never forgotten)

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    Quote Originally Posted by Miron View Post
    Mu old van (1988) was stating 35 and the T&C is stating 36. Keeping the pressure between 35-38 I never had any wear issue but going over I feel like driving on a stone paved road and every little something on the road is felt on the steering wheel, especially at city speed.
    Depends on the hardness of the rubber, % of tread left and the stiffness of the sidewalls / load rating of the tires. Snow tires will feel different from all season tres for example.

    The disussion at this site is very interesting. An example, and it gets better:
    As an instructor and owner of Control Driving Skills in Smiths Falls, Canada, our classes are taught to keep their tires at the "Maximum" air pressure indicated on the sidewall at all times for safety and vehicle control reasons. I agree that under "normal loads" the manufacturer's recommended pressure is sufficient. "Normal loads" only apply when everything is under control. During emergency situations it is not uncommon to load an individual tire with 10 - 20 times the normal load if heavy braking or aggressive steering is undertaken. Now you need and want maximum pressure to ensure the tire will stay on the rim. You will not have time to stop and increase your pressure before you complete the exercise.

    Maximum pressure is compared to an insurance policy—you hope you will not need it—but if you do ... you'll want it NOW!

    Stiffer side-walls give better steering response, as well as better braking response, cornering control, and keep the footprint properly placed on the road surface for maximum traction. Softer tires wear out quicker, hydroplane at lower speeds, and roll more with lateral pressure.

    Also, air pressure loss due to temperature drop is not as critical, not to downplay the practice of constantly checking air pressure. We tell our students that especially during the fall, winter, and spring to check their tires every two weeks.

    When I get told that harder tires result in uncomfortable ride, my response is that 90% of comfort is the result of the vehicles suspension system and the thickness of the seat you are sitting on. But if they insist, I tell them that they have to sacrifice a little comfort for better control.
    2007 GC SXT - Magnesium - S&G - 3.8L - 115,600 kms
    2002 GC Sport - Stone White - 3.3L - 314,240 kms
    2003 Jeep TJ Sport - 4.0L - 246,430 kms

  11. #30
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    "our classes are taught to keep their tires at the "Maximum" air pressure indicated on the sidewall at all times for safety and vehicle control reasons"

    I never heard such an oxymoron... and I will never do that unless I'll become a race/stunt driver

    In my experience (all seasons tires) going over 37-38 the ride becomes too bumpy and I think, in time, it will damage the suspension system. All the 'advantages' shown in that article are not applicable to me and I think are not applicable for most minivan drivers. Minivans are not rally cars
    Winter tires are much more 'soft' but I would not over-inflate them because you may lose exactly their winter features such as better grip.
    2002 Town and Country LXI - 3.3L - 133,000 miles
    1988 Dodge Grand Caravan LE - 3.0L - 270,000 miles (Gone but never forgotten)

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