polaris sportsman 500 bad cam symptoms

Polaris sportsman 500 bad cam symptoms

Registration is fast and you can even login with social network accounts to sync your profiles and content. I figured some of the quad owners on this forum have probably bought them before as this is a common problem on the Polaris My exhaust cam lobe is almost completely wore down and the thing hardly will even get up an go.

I like other's opinions rather than just "buying on the fly". If any of you guys have a good suggestion I'd be interested in getting a good one at a fair price. I was able to save a bundle.

Pictures of Sportsmans common cam problem.

I will post results after the parts come in and I get them installed. I'm excited to see this machine really run! I did not know after I bought them but it came from Vancouver Canada. I thought it was here in the states. No big deal. Plus FREE shipping. I failed to mention a few things. I asked if it was an OEM or a second manufacturer? He said "you can only get OEM camshafts for a Sportsman By now I'm scared to death to stick around this guy's shop.

That's when I decided to search online. I found the site after you sent me the link and realized it was tied to Amazon. I got the camshaft, both intake rocker arms, the exhaust rocker arm, the camshaft sprocket, and the cover gasket. Wow, now that's smart shopping! Hold Your Horses. I got the parts in the mail and started to do a check of sizes.Join us now!

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Forums Posts Latest Posts. View More. Recent Blog Posts. Recent Photos. View More Photo Galleries. Unread PMs. Forum Themes Elegant Mobile. Essentials Only Full Version. Trail Rider. Pictures of Sportsmans common cam problem. This seems to be a problem with the sportsmans. The exhaust lobe on the cam wears off.

I think that my carb float neeedle and seat being worn out caused this. I noticed that I had fuel in my air box. Drained it and didnt think anything else of it.

Put a new needle and seat in it.

Troubleshooting Tips for the Polaris Sportsman 500

Turns out that about 3 weeks later I realized gas had also filled my motor and diluted the oil so much it was like water.Removed valve cover and rocker arm. Reply 1. Polaris designed this utility ATV for hunting and trail riding, and the company offers a number of troubleshooting tips for common problems that may arise.

Revival of an old thread. If this is your first visit, be sure to check out the FAQ by clicking the link above. Runs bad at low These in most cases just wear out. More expensive than I was hoping for, but at least it can be used now.

The oil level sensor will alert the driver that the engine is low on oil inside the crank case. So I thought it might be the starter.

Bad rocker arms would ruin a cam. The Polaris Sportsman is a quad designed to haul gear, animals and riders for back country activities. Note about price: This service is typically done as part of a bigger, more expensive I notice that when I am accellerating, if I let off the throttle, my exhaust backfires and pops.

I'm thinking that's my problem with running so rich down low. The leading Suzuki ATV owner's forum community offering a wide collection of information. One of the best indicators of a failing fuel pump is found on the open road. Float level is within specs. The TPS connects to the throttle plate on the throttle body. Some of the symptoms of a bad harness are a "Check Engine" light and ECU codes of 41 and or 45, or intermittent rough idle speeds.

Actually it looks all bone-stock save for the Yoshi exhaust can. This high quality wiring harness typically fixes Polaris codes: SPN FMI 8, 2; Some symptoms of a bad crankshaft position sensor harness are the engine will intermittently stall out and may or may not restart. We carry parts for vintage snowmobiles, classic snowmobiles, and all modern snowmobiles. What causes this? My muffler is not packed and has no baffles.

The cam and lifter sets last about years before causing a run issue. I took carb off and completley disassembled and cleaned all jets with solvent and compressed air,nothing is plug up or blocked. This is controlled by the engine's computer. Gents, I recently have had trouble starting my 08 outlaw. There are a number of common symptoms of a bad crankshaft position sensor CKP that can help you determine if your sensor has failed, including engine misfires, rough idling, stalling, or hard starting.

This gave the company over 25 years of ATV experience when it released a new model of the Sportsman for I got it changed there a few months ago and shortly thereafter my car started to overheat and the heater stopped working. If you think your sensor has failed, here are some common symptoms of a bad crankshaft sensor that can help you in The symptoms you typically experience when your pump is failing are poor upper RPM performance, a loss of top speed and poor acceleration.To actually check the chain, it need to come out.

I have had a water pump seal go bad before but when that happens the weep hole under the pump will dripso if you suppect water in the oil the first thing id check is that weep hole. The last thing id like to add is if you have a cracked cylinder or bad head gasket the coolant will be pushed out the overflow bottle from the engine compression adding pressure to the coolant system.

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polaris sportsman 500 bad cam symptoms

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OK Cancel. Login to make your opinion count. Username or Email. Password Forgot your password? Log me in automatically on each visit. Sign up. Latest Topics. Private Messages : Unread. Posted I believe I have a blown head gasket.

polaris sportsman 500 bad cam symptoms

My oil looks sort of like chocolate milk and when I fired it up the first time this year there was some grey smoke coming out of the exhaust but not constantly. Because I know white smoke is coolant and blueish smoke is oil, this smoke was faint but it was just grey.

The oil level has always been constantly full on the dipstick, never needed to add any oil to it. The radiator is full and the level on the reservoir when its cold is at the ADD line.Registration is fast and you can even login with social network accounts to sync your profiles and content. I just wanted to let all you Polaris Sportsman HO owners know what I came across today while working on my bike. I decided to pull the bike out today to start getting it ready for my trip up north next week.

When I started it up I noticed the infamous Polaris Sportsman ticking that comes from the front right of the engine.

But what I did notice when I started the bike was the noise was a bit louder than I last remembered it to be. So I decided to changed the oil and I followed the procedure in the manual right to the letter!

When I was done changing the the oil I pinched off the vent line to the top of the oil tank to prime the oil pump and started the bike. I held the vent pinched for around 15 seconds and released it untill I heard the air release sound. Now the pump is primed and the oil is flowing like it supposed to be but the infamous ticking is still there but a little quieter.

This difference in sound had got me thinking about what could be causing the noise and what I came up with is a air pocket that is trapped in the oil pump.

You may think that sounds a little far fetched for air to be trapped in the oil pump, but what I did next seems to have solved my ticking noise. I started the bike and I pinched the oil return line that comes from the pump and goes to the tank. I only pinched it off with a pair of needle nose pliers for a few seconds at a time. Each time I pinched the hose the tone of the engine would change and sound as if it was loading up.

I also noticed the hose expanding slightly from the oil pressure, when this happened I would release the hose and you could hear the oil rushing back into the tank. Now I don't know if this will work on everyones bike but it seemed to work on my bike and I now love the sound of my bike, it sounds like new again!

Sounds like a rocker adjustment might get the rest out. Something else to check is the one way valve maybe worn. Follow the oil lines down to the bottom end and you will see a 12mm bolt next to the oil lines going into the bottom end pull it out and remove the spring and plunger see if the rubber end is worn its a 15 dollar part that will cause you allot of problems when it fails. Its what holds the oil on the top end when the motor is not running when it fails it allows the oil to drain from the top end causing dry start which will ware a cam out quick.

You can post now and register later. If you have an account, sign in now to post with your account. Note: Your post will require moderator approval before it will be visible. Paste as plain text instead. Only 75 emoji are allowed. Display as a link instead. Clear editor. Upload or insert images from URL. Not a member? Polaris ATV Forum. Search In. Facebook Twitter YouTube Pinterest. Do you own an ATV? Join our Forum! Recommended Posts. Posted July 28, Its just my opinion, but I'd replace the starter first.

Just because the starter turned it over under a "no load" condition, doesnt mean its good. And besides, if it's NOT the starter, at least you'll have a new starter and your old one as a back up. Ive already had to replace the starter on mine once. This lever broke at it's weakest point. Well I go ahead and fix it and hopefully I don't have to do this again.

If the arm sees that much pressure or enough pressure to break clean off you would think KTM would have corrected the problem. Literally found that problem 3 days Ago! That sux. Welcome, Private Messages : Unread.

polaris sportsman 500 bad cam symptoms

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Insert URL Cancel. Please paste your code into the box below:. OK Cancel. Login to make your opinion count. Username or Email. Password Forgot your password? Log me in automatically on each visit. Sign up. Latest Topics. Private Messages : Unread. Posted I am the original owner and I've done all the maintenance and valve adjustments myself.

I recently replaced the battery with a and I couldn't get it to barely crank over. So I thought it might be the starter Upon further research I read about the auto decompression lever going bad.

Well, needless to say I made my own crank locking bolt and locked the motor at TDC. I checked valve clearances and they were about. No big deal. So I've proceeded to take the cam cover off the top of the motor. In order to change the auto decompression lever and spring the cam has to be removed, so I have to cut the timing chain. I know this set up works off of centrifugal force.This gave the company over 25 years of ATV experience when it released a new model of the Sportsman for Polaris designed this utility ATV for hunting and trail riding, and the company offers a number of troubleshooting tips for common problems that may arise.

If the engine does not turn over, Polaris suggests three potential problems and solutions. First, there may be low battery voltage, and owners should try to recharge the battery to Two other problems may be that there are loose connections on the battery or on the solenoid. In either case, owners should check and tighten all connections. If the engine turns over but will not start, it is possible that the ATV is out of fuel.

If that turns out to be the case, fill the tank.

polaris sportsman 500 bad cam symptoms

Then turn the cycle key to "on" three times for five seconds each, at which point the engine should start if lack of fuel was the problem. It is also possible that water is present in the fuel or that the fuel is too old, in which case it must be drained and refilled. If there are defective spark plugs or no spark is going to them, then the spark plugs should be inspected and replaced as necessary.

If the engine backfires, it is possible that there is a weak spark, an incorrect spark plug gap, old or waterlogged fuel, or loose ignition connections. For other possible problems, such as incorrectly installed spark plug wires, incorrect ignition timing, or leaking exhaust components, consult a Polaris dealer.

If the engine runs irregularly, stalls or misfires, it is possible that there are dirty or defective spark plugs, which must be inspected, cleaned or replaced accordingly. It is also possible that there is low battery voltage.

The Scrambler battery must be charged to Additionally, there may be incorrect or water-filled fuel, which must be drained and replaced.

In that case, a rider should allow the engine to fully warm up before operation. If the Sportsman engine is overheating, it may be that there is debris stuck in the screen. The debris must be removed prior to further operation. It is also possible that the radiator is plugged. An owner can take care of this by using a garden hose to wash debris from the radiator fins. Polaris cautions that powerful hoses i.

When the Sportsman stops or loses power, this may be because there is not enough fuel. Owners should refill fuel and turn the cycle key to the "on" position three times before attempting to start the engine again.

Polaris sportsman 500 bad cam symptoms

If this is not the problem, it may be that there is a damaged or clogged fuel vent line, which should be inspected or replaced if necessary. The engine may also stop if there is watered-down or incorrect fuel, which must be drained and replaced. Ignition connections should be inspected and tightened, and spark plugs should be cleaned and replaced if necessary. If the engine still loses power, it is possible that there are defective spark plug wires, reverse speed limiter or electronic throttle control malfunctions or other mechanical failure, all of which warrant a trip to a Polaris dealer for repairs.


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