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Old 05-28-2010, 09:55 AM   #1 (permalink)
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Default 31' tires

Hello everibody, my name is Roly and I currently own a 91 Suzuki Sidekick with "home-made" 5 cm suspension lift and 3 cm Body lift.
I really don't know how many km/miles it has but when i bought it it was burning oil in excess of 1l/1500-2000km, changed to 10w-60 and since it burns 500ml every 2500-3000 Km.
Currently running on 215/80/r15 remoulded/rethreaded tires(yokohama feolander MT copy), 32mm wheel spacers and 7j et-30 rims.
My question is related to the 31/10.5/r15 tires.
Do they fit? Can the standard Suzuki 1,6liter engine, front axles, front diff handle the 31's without any modification?
I'm aiming to buy 4 31's bfg km2 mt tires.
I would be glad if somedoby coul give me a piece of advice regading the factc above.
I'll attach a few photos with my car,
Thank you
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31' tires-dsc05525.jpg   31' tires-dsc05524.jpg   31' tires-dsc05535.jpg   31' tires-11042010679.jpg  
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Old 05-28-2010, 01:23 PM   #2 (permalink)
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Is it burning the oil or leaking it out of the distributor adapter housing onto the transmission? Mine was leaking pretty good so I replaced the o-rings and it stopped. food for thought..
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Old 05-28-2010, 01:32 PM   #3 (permalink)
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thank you Psychozuk, I changed the O-rings but it was still burning oil. So I changed to 10w 60.
Main problem now are the tires

Last edited by roly; 05-28-2010 at 01:48 PM.
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Old 05-28-2010, 02:51 PM   #4 (permalink)
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Could be from Valve Guides also.

A Compression test will tell if your piston rings are worn or valve guides are bad.

Another thing is, a bad PCV valve can suck the oil out too.

Going on a higher viscosity I would not recommend.

Oil does 6 things:

Cools
Cushion
Seal
Lubricate
Clean
Preserve

So the oil have to be thin enough to get through the passages to lubricate, clean, preserve and cool and thick enough to seal and cushion.

So thicker oil can turn into sludge due to slow flowing characteristics.

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Old 05-28-2010, 03:55 PM   #5 (permalink)
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i will do the compression check next week.
How can I diagnose a bad pcv valve?
How about the 31's? can i run them in stock configuration? how dramatic will the power loss be? with the 215/80 remoulded tires you can tell the difference relatet to 205/75. Could it be related to the weight?
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Old 05-28-2010, 07:54 PM   #6 (permalink)
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PCV valves are cheap, just replace it.
If I am not mistaken is part of the maintenance.
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Old 05-29-2010, 07:48 AM   #7 (permalink)
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1. Where is the pcv valve? How can I check it?
2. What is the best MT tire for the sidekick? I don't want it to suck on snow and ice.
3. The same question I asked in yesturday, can I put on 31'/10.5/r15 mt tires on? How does the car handle, how does the front diff and both front planetary axles? How dramatic is the power loss?
The main ideea is I don't want to ruin the reliability, i just need better overall grip, traction and first an foremosts better ground clearence(31's opossed to 215/80)
Thank you
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Old 05-29-2010, 10:00 AM   #8 (permalink)
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I have been looking at tire sizes and I think the 235/75/15 are the biggest that you can use with stock setup and does not interfere with any of the travel.

A rule of Modifications, once you mess with some you have to mess with another thing until balances out.

Like bigger tires, larger clearances, different gearing, mod the engine for more power which translate on higher fuel consumption.

So, the little economical 4x4 that you bought now is a gas hog. If you want that, go with a stile and get a Jeep or a Rover.
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Old 05-29-2010, 10:07 AM   #9 (permalink)
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Quote:
Originally Posted by roly View Post
1. Where is the pcv valve? How can I check it?
2. What is the best MT tire for the sidekick? I don't want it to suck on snow and ice.
3. The same question I asked in yesturday, can I put on 31'/10.5/r15 mt tires on? How does the car handle, how does the front diff and both front planetary axles? How dramatic is the power loss?
The main ideea is I don't want to ruin the reliability, i just need better overall grip, traction and first an foremosts better ground clearence(31's opossed to 215/80)
Thank you
1. don't know mines right on top comming out of valve cover i would assume your is also.

2. Im a Cheap ASS so I got gt radial's mt 31x10.5x15 with black steelies. paid $650 out the door. I belive that they are austiran tires.

3. Im not sure how much lift you have In inches it look like 2 in sus. and a little over one inch in the body.
I would say no but if you cut and hammered a bunch you could probly do it. As for can it handle it. the front diff no I broke one vary earily on. Now I have a peice of strap steel on it and it does fine for now been way harder on it.
Also for the power loss I have a 16v when I did the lift and added the bigger tires 1st st 31" at tires. Used $50 bucks mounted and balanced. I lost a bunch of power still more than my jeep tho. Went from 27 mpg to 23mpg. then head gasket blew rebuilt with new HP camshaft and got new magnaflow muffler and new 2" pipe all the way out. Also got 31" supwer swampers 200 used on craigslist even came with 5 rims. one is my spare the rest went to the recycler for scrap got 35 bucks. mpg went to 20-21 but the power was great, with the radial's MT 31x10.5x15my mpg is now 22-24.


thats my current set up with stock gears I can cruize at 75-80 on the freeway.
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Last edited by obradleyo; 05-29-2010 at 10:12 AM.
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Old 05-29-2010, 12:15 PM   #10 (permalink)
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can you add a picture regarding the strap of metal that you have used to spool aroud the front diff? sounds really intresting. cuz I don't want to mess mine up
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