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-   -   [HOW-TO] Inspect a used vehicle. (https://www.350z-tech.com/forums/141-how-articles/78322-how-inspect-used-vehicle.html)

Thane 05-27-2014 02:07 PM

[HOW-TO] Inspect a used vehicle / New owner maintenance
 
Hey everyone! I just recently went through the process of buying a used car, which as we know, can be stressful and full of hidden surprises. With this list, and after doing a lot of research before beginning to look for my car, I was crawling all over the car knowing exactly what to look for. It made the process go by a lot faster, and suggested looking at things I probably would not have come up with on my own. So I would like to contribute my share of experience and knowledge to the site since I'm new here, and help whoever is in the same boat as I was last weekend while I was inspecting my new 350z!

Most of this information came from other forums and threads. I just took the liberty of putting it all together in one place.
I'll try to give credit if I can remember where the information was pulled from.

If anybody has anything they think should be added to the list, feel free to provide suggestions!

I hope this helps!

The skeleton of this entire list comes from dammitjim over at s2ki.com forums. There were bits and pieces I took out from his list that I thought were either common sense or that I didn't plan to comply with. You can find his version here

Summary of common 350z problems that could affect the value of a car:

More detailed lists:
Common Problems/known Issues With The 350z

2002-2005

• Tire feathering (Check tires for feathering)
• Window grease marks (correctable with new window regulator brush kit)
• Rear drive shaft ‘clicking’ (audible when accelerating off the line or starting to reverse)
• Bubbling of the Rays alloy wheels (signs of corroding)
• Handbrake does not stop car from moving (dealer adjustment required)
• Fuel filler cap not opening with first release (replaced with upgraded parts)
• Boot lid not opening with first release (replace springs)
• Boot not staying up when opened (replace hydraulic struts)
• Bose stereo Cd’s skip in cold weather/left speaker cuts out
• Windows not sealing properly (dealer may need to reset)
• Squeaky seat (dealer fix)
• Airbag warning light stays on (dealer reset, could be serious if not fixed)
• Grinding gear box (warranty issue)

2006

• Oil consumption issue. (check oil level and color)

2007

• Alarm triggering for no apparent reason (warranty fix)

All Years
• Window motors (slow movement, won't go up/down fully, windows bounce down after reaching the top position when auto-up'ed.)
• “Environmentally friendly paint” chips easily from highway debris (i.e. rocks).
• Shifting problems. (Grinding gears - Don't skip any gears)
• Soft top tears and holes (verts)
• Using incorrect jack points
• “Rock Blender” - Throwout bearing noise heard when clutch is out. It is “ok” but not normal.

Questions to ask a private seller over the phone:
(A used car dealer would not know the answers to most of these questions, you’re on your own there. If you are buying an out of warranty car from a dealer -don't- take their word for anything mechanical on the car. It's the buyer's responsibility to make sure they know what they are buying, not the dealer's.)
• Get the VIN number and run an Autocheck or Carfax.
• How many miles are on the car?
• How many miles were on the car when you bought it?
• How long have you owned the car?
• Why are you selling?
• Where did you buy it?
• What maintenance records do you have?
• What recent work has been done to the car?
• What work does the car need as it sits?
• Has the car been in any minor or major accidents?
• When was the last time the oil was changed?
• How often is the oil changed?
• How often does the oil need to be topped up?
• Has it ever been run low on oil?
• Casually ask them how long the tires last. That can give you an indication of how it has been driven.
• Has the car ever been raced?
• Where was the car stored? A garage is ideal.

Things to check before leaving for a test drive:
• Bring something to take notes on and write down any pluses or minuses for each car you look at. After you see a few it can be hard to keep them straight without notes.
• Ask the owner to not start the car before you arrive to see it. Some problems will only be evident when the car is cold. If you know how to not burn yourself, hold your hand next to the engine or header to verify the engine is cold when you arrive.
• Try to get a look at their garage. The condition of their garage can (but not always) indicate how well the owner takes care of their car.
• Check for any leaks where the car is parked. Keep in mind there could be funk on the ground unrelated to the car. I prefer to see where the car is normally stored.
• Check the oil for level and color. Dark oil is not ideal but can mean it just needs to be changed. Oil below the low mark is very bad. Oil that is cloudy or milkshake colored can indicate a blown head gasket or cracked head and that you should pass on that car.
• Check the coolant for level and color (Don’t open the radiator cap on a hot engine!) Coolant that is low is not ideal, but may not be a big deal. Coolant that looks like a milkshake can indicate a blown head gasket and that you should pass on that car.
• Look under the oil cap and into the valve cover. Ideally it should look like the oil on the dipstick. Sludge or a milky color can indicate lack of maintenance.
• Check the brake and clutch fluid color and level. These can get dirty fast so dark isn’t always a problem. If they are low that could indicate brake or clutch trouble and bills in the $100-300 range at an independent mechanic. Much less if you can DIY
• Look at the battery terminals. If they are corroded that indicates lack of maintenance by the owner. A battery is cheap and easy to replace, but this sort of thing can help you determine if the car has been well cared for or not.
• Take a quick look at the tires, especially the rears. Uneven wear on the tires can indicate anything from bad alignment to parts that need replacing or an accident.

During the initial test drive:
• Does the car start and idle normally when cold?
• Is there obvious blue smoke or –lots- of white smoke coming from the tailpipe? Both are probably deal breakers. A small amount of white smoke is normal.
• Drive on the highway and around town like you normally would. Shift up and down through each gear. Take the car to redline without abusing it or breaking the law. Try braking from different speeds. Let car decelerate in gear from several gears at different speeds. Pull into a parking space. Use reverse. Try to make it show you any faults.
• Do any idiot lights flash or stay on during the drive? Oil, CEL, ABS and EPS lights should warn you of potentially expensive repairs. Adjust the price accordingly if you're buying a car with these lights on.
• Does it shift smoothly through all gears including reverse?
• Find an empty road, get up to about 30 in third gear and floor the accelerator. If you can see the engine RPMs climb independent of the car accelerating, the clutch likely needs to be replaced.
• On the same empty road, brake from highway speeds with a light grip on the wheel. Does the car pull to one side? If it’s not caused by the crown of the road that could be things like tire pressures, alignment or bad brake calipers.
• Is the steering wheel straight when you’re going straight down the road? This is a pet peeve of mine and can be caused by a variety of problems, some inexpensive, some expensive.
• Are there any excesses vibrations?
• Does the cruise work? (if equipped)
• Does the emergency brake work?
• Find an empty parking lot and do slow figure eights both forward and reverse. Listen for any strange noises. In a FWD car you can check CV joints this way.

Now park the car and inspect the following:
• Now that the car is warm, is the engine making any unusual sounds?
• Does the car start and idle normally when hot?
• Now is there obvious blue smoke or –lots- of white smoke coming from the tailpipe? Both are probably deal breakers. A small amount of white smoke is normal.
• Pull the air filter out, is it clean or dirty?
• Is the wear on the steering wheel, pedals, shifter, carpet, seats, etc consistent with the miles on the odometer? This is a good way to confirm that the odometer hasn't been tampered with and can give you an idea of how the owner takes care of the car.
• Do all the keys work all the locks and start the car? Do the key fobs work?
• Verts - Does the top go up and down smoothly?
• Verts - Are there any holes or excessive wear marks on the soft top? Look inside and outside.
• Are the seats worn excessively? These are expensive to replace.
• Do all the seat controls and compartment doors work smoothly?
• Does the radio work?
• Does the Navi come on with the cubby lid fully open? (if equipped)
• Look under the dashboard on both sides for non-stock wiring that could indicate modifications. This may or may not be a big deal, but it’s worth being aware of and asking the owner about.
• Is there water in trunk? Put your hand on the interior carpet near the footwells. Is there any evidence of wetness or water intrusion?

Now take a look under the car
• Are there any signs of leaking from the engine, transmission or differential?
• Any signs of rust in the wheel wells or underbody?
• Any damage from bottoming out, accidents, improper jacking, etc?
• Torn axle boot, tie rod boots, or ball joints. If a boot is not dry that part probably needs replacing
• Exhaust leaks or damage. Leaks can usually be identified by black soot where two exhaust parts join.
• Look at the brake rotors. If they are scored with deep grooves the brakes likely need replacing. If you are confident the brakes are cool, you can run your finger over the edge of the rotor to feel how worn they are.
• Run your hand along each tire’s tread at both the inside and outside of the tire. Tires can look fine on the outside tread and be worn bald on the inside. Worn more or less in the middle usually means incorrect tire pressure. If the tread feels “choppy” and not smooth there is likely an alignment or suspension problem. This could be anywhere from a $100-1000+ repair, not including the cost of tires.
• With the steering wheel unlocked, grab each wheel or tire at 9 o’clock and 3 o’clock and shake or push-pull it as hard as you can in and out. If you feel clunks that can point to things like bad tire rod ends or wheel bearings. Do the same at 12 and 6. If there are clunks or strange noises, expect a $100-300 bill at each corner, more if it's wheel bearings.

Check for signs of body work or accidents
• Verify that all the VIN stickers are in place and match the car’s VIN.
• Open the hood and look at the bolts holding on the front fenders. Often there will be paint worn off of these if the fenders were removed.
• Same with the door and trunk hinges.
• Look at the radiator support. Does the paint look strange or is there evidence of replaced parts? Poor repair work from a front end collision can be visible there.
• Look for overspray onto any black panels near a painted body panel. Fender liners and door/windshield trims are good places to look for overspray.
• Check door and panel edges for paint lines.
• Check the sides of doors or door jambs for bodyshop stickers.
• Check that body panel gaps are even. This includes the bumpers.
• Look at adjacent panels from different angles and in different light. Poor paint work can show up as inconsistent color or texture between panels.
• Check the glass for Nissan logos. Glass could be replaced due to minor things like rock chips or it could be a result of theft damage or an accident.

If you're getting a professional pre-purchase inspection:
• Don't let the selling dealer or private seller arrange the inspection. Take it to an independent shop.
• If possible, get an Engine Compression test done. If you want to DIY, compression testers can be as cheap as $6, and show how strong the engine still is. All cylinders should be within 20psi of each other. Normally weak compression has to do with worn rings, a leaking head gasket, or a valve not sealing. This could be more common with the High-Rev engines and their oil consumption issue.

These are items that came with new 350Zs. Be sure to ask the owner if they are included:
• Original window sticker
• Owner's manual
• Warranty information
• 2 Master keys
• 2 Remotes
• 1 Valet key
• Spare tire
• Wheel lock keys (if there are wheel locks)

Thane 05-27-2014 02:13 PM

Here is a list of suggested procedures for a recently acquired used car:

This portion was also provided thanks to Themikewoo over at s2ki.com forums.
Although the list was originally intended for new s2k owners, I again altered it in a way that would apply to a 350z.

Themikewoo's new owner maintenance


• Change all fluids and filters
• Gravity bleed the brake and clutch fluid
• Check tire tread depth on the inside and outside of all tires
• Get a good alignment
• Change the spark plugs if your car has a lot of miles
• Check the oil often, some cars burn more than others. Sometimes switching oils will help with oil burning
• Some cars burn excessive amounts of Mobil 1
• Regrease the shifter lever pivot points
• Pull the valve cover and inspect the retainers and keepers
• Change the belt
• Clean/protect cv joint boots
• Fresh Claybar/Wax


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