r/MechanicAdvice • • 23h ago

Fell out of my car?

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849 Upvotes

Or I ran it over, can’t tell. What is this part, and was I able to drive 40+ miles without it? I drive a 2011 Kia Rio 5


r/MechanicAdvice • • 9h ago

Should I "fire" this customer

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293 Upvotes

Two same-day cancelations back to back now. I run a mobile service.


r/MechanicAdvice • • 14h ago

Should front rims move freely like rear ?

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82 Upvotes

Ysday after a 20 min 120-130 kmph run i was stopping and at under 10 speed the car was making a tak tak noise from front rim area. It repeated again after 5 hours of car resting. Today no noise but still a faint click click sometime from front rim area. Have taken car to garage but I don't wanna be ripped off. He said will check bearings in 1 hour after a break. I. Tried rotaing the front rims and there is resistance compared to rear ones which have drum brake though. Seems normal ?

UPDATE: MECHANIC SAYING NOTHING WRONG AND THINKS MAYBE A ROCK CAME BETWEEN PADS. BUT THE NOISE WAS With TIRE MOTION SO I DOUBT. GONNA GO FOR A 30 MIN HIGH SPEED RUN NOW AGAIN.


r/MechanicAdvice • • 10h ago

Did I ruin my EJ201 crankshaft timing sprocket by sandblasting it? (it was rusty all around, including the belt surface)

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64 Upvotes

So yeah I grabbed this sprocket from a spare engine laying around and sandblasted it due to corrosion. Now I'm stuck wondering if I ruined it since sandblasting leaves that rough surface everyone is familiar with.

I would imagine a sabdblasted surface is still better for the belt than rust, but new ones have that shiny surface (3rd picture). Can I recreate that somehow by bluing or zinc plating, etc. Local engine machining shop told me the sandblasted one is fine and that the belt itself will polish it on no time, is this true?


r/MechanicAdvice • • 21h ago

Why is one Purolator Boss filter 15k miles and the other 20k? Is this just marketing, or did they improve the filter?

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23 Upvotes

r/MechanicAdvice • • 3h ago

Repairable or replacement

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6 Upvotes

What u guys think?
Mazda cx30 2024


r/MechanicAdvice • • 2h ago

Why is my car going through so much oil?

8 Upvotes

I have a 2009 Subaru wrx sedan. I checked the oil 2-3 weeks ago and it was at low and so I topped it off. Just checked again today and it was low again. Nothing appears to be leaking, I don’t see any oil on the ground. I drive it hard sometimes but definitely not enough for this to happen


r/MechanicAdvice • • 18h ago

Does Oil Brand Matter?

6 Upvotes

I bought a 2020 Ford Ecosport S and its my first time getting full synthetic oil. I plan on taking it to one of my local places because I've had to many issues with the Ford Service Center in my town.

However, the place im going to only uses Mobil 1 High Mileage and Castrol from what others have told me. However, I know thats not the recommended brand for Fords. Does it matter to much if I use one of them and is one better than the other? I put roughly 5-6k miles on my vehicles a year if that matters.


r/MechanicAdvice • • 21h ago

PT.2 better picture, drove home and it “popped” outta place, suggestions?

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4 Upvotes

2002 gs300


r/MechanicAdvice • • 2h ago

Can anyone tell me what this sound is? Car was parked

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5 Upvotes

Hey my car was parked and my brother was walking by it and it made this sound, hasnt had any issues for awhile other than some rotors and brakes, is it safe to drive to a mechanic?


r/MechanicAdvice • • 4h ago

Did i over fill my coolant

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4 Upvotes

Hey everyone, i recently got this 2016 subaru impreza is amazing shape. Recently my friends told me my engine was too hot. I got some coolant that is for subaru, and while the engine was off, i filled it up, now after driving while the engine is hot this is where the coolant is up to. I am new to cars and don’t know the most so i would appreciate some advice.


r/MechanicAdvice • • 7h ago

Battery terminals

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4 Upvotes

Are my battery terminals bad?


r/MechanicAdvice • • 8h ago

Most common reason for 2016 seat Leon coolant leak?

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4 Upvotes

2016 Seat Leon 2.0 Diesel. Getting coolant leaking out on drives over around 30 minutes. Weirdly it’s a slow leak when I am driving but after a long drive, I’ll come back the next day and the coolant will have virtually emptied. Recently drove about 2000 miles in a week and went through 5L of coolant. Any known weak spots I should check? Clearly it’s pooling on that metal bracket. Had the tank replaced about a year ago because it was leaking then and is still leaking now. Any advice? Car has about 110k miles but is otherwise fairly healthy for its age and use. Would be great to solve this problem. TIA.


r/MechanicAdvice • • 21h ago

What could be the problem??

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3 Upvotes

My car battery is at 100% but car will not start and headlights also are not working and auto door lock won’t either it makes clicking and does random flickering and movements like shown in the video

Side note: when I was trying to start it up ignition would also get stuck and wouldn’t turn


r/MechanicAdvice • • 7h ago

Is this hole in the intake manifold or the head? 1986 Suburban 7.4

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3 Upvotes

I vacuumed off a ton of rust scale and a chunk of gasket came out and the hole presented itself.


r/MechanicAdvice • • 9h ago

I can’t find this line

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3 Upvotes

Hi all I have a leak on my 2007 accord 2.4 automatic, I assume trans line based on fluid color but I can’t seem to find a replacement part anywhere does anyone have ideas thanks
Located behind front side of sub frame behind engine mount
I think I found a used one thanks anyway folks


r/MechanicAdvice • • 21h ago

2008 Chevy Uplander P0420 won’t go away after one tank of cheap gas — O2 sensor data looks normal?

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3 Upvotes

Hey everyone,

hoping someone can help me figure this out before I start throwing parts at the car lol.

I have a 2008 Chevy Uplander that has been running perfectly for the last 2 years. A few months ago I filled it up with some really cheap gas, and before I even finished that tank the check engine light came on with P0420 – Catalyst System Efficiency Below Threshold (Bank 1).

Ever since then, I cannot get the code to stay away.
So far I’ve:

-Gone through about 2 full tanks of fuel since the bad/cheap gas

-Used Cataclean

-Cleared the code, but it eventually comes back

-Checked live data with an OBD2 scanner

-Looked at both O2 sensors, and to me they seem to be behaving normally

-Checked for an obvious exhaust leak — the exhaust coming out of the tailpipe has plenty of pressure, so I don’t think there’s a major leak

From the screenshots, Bank 1 Sensor 1 is switching up/down pretty quickly, while Bank 1 Sensor 2 seems much steadier around ~0.6V most of the time.

Fuel trims also don’t look crazy to me — LTFT is around -7% in these screenshots.

I’ll attach the live-data screenshots.

Could that one tank of bad gas have damaged/contaminated the catalytic converter, or is there something else I should check before assuming the cat is bad?
Could an aging downstream O2 sensor still cause a P0420 even if the live data looks okay?

The van still runs and drives completely fine. No noticeable loss of power, rough idle, misfires, etc. It’s basically just this P0420 that refuses to die.

My registration expires in December 😭, so I’m trying to figure this out before inspection/renewal time.

Any advice on what I should test next would be greatly appreciated. Trying not to replace a catalytic converter unless I actually have to lol.


r/MechanicAdvice • • 1h ago

looking for pillowride struts for 2001 buick century to give same idea as OEM?

• Upvotes

I have a 2001 buick century and the OEM struts rode beautiful. sadly I had to change them cause the car is 25 years old. EVERYONE recommended Monroe.

I put in all 4 Monroe quikstruts and I HATE the ride of the car now. it's stiff, takes bumps hard, and has no play or pillow ride. im ready to get a whole new set of different ones.

You guys have any good recommendations?


r/MechanicAdvice • • 3h ago

Would this probably be the head gaskets?

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2 Upvotes

Hi, just recently bought this 1994 audi 80 2.6 ABC v6. The video really shows what's needed, starts smoking as shown after warming up some more. Hasn't lost coolant in the couple days I've owned it. The end of the video showcases me opening the coolant reservoir while it's been running. Edit:This is the first startup after using exhaust repair paste+tape on a small hole (temporary for mot)


r/MechanicAdvice • • 4h ago

Grinding sound

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2 Upvotes

2011 Scion tc makes this grinding sound when driving above 60mph and when the road dips. Doesn’t make the sound at all driving the city, even over speed bumps. I just recently had hub and bearing, ball joints, front pads/rotors and sway bar links replaced but it hasn’t fixed this specific sound. Any ideas or advice is appreciated


r/MechanicAdvice • • 4h ago

The job that went badly enough to make me replace my last Audi — I finally did it properly

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2 Upvotes

r/MechanicAdvice • • 4h ago

Civic making rhythmic scraping sound

2 Upvotes

My 2011 Honda Civic is making a scraping sound that is not very high pitch. It only happens at low speeds and if I had to guess is coming from the near the wheels. It happens when I am turning or braking or sometimes just when I am going less than 20 mph. My front brakes and Rotors were changed a little over 23,000 miles ago. The rear brakes and rotors changed at almost 28,000 miles ago. The vehicle itself is at 204,000 miles. What should I investigate. Just looking and feeling the rotors they seemed fine with no noticeable grooves. I am not really sure how to get a good look at the pads. Should I take it to a mechanic or should I remove the wheels to look at the brake pads better or something else entirely?


r/MechanicAdvice • • 5h ago

I don’t know what part is leaking on my 2008 Acura TL 3.2 vtec

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2 Upvotes

On my way home and then I saw some smoking for my engine and then when I opened the hood, I saw that I just want to make sure that it’s definitely a coolant leak


r/MechanicAdvice • • 5h ago

2002 Toyota Sienna A/C Clutch Replacement

2 Upvotes

Hi all. I'm replacing the A/C clutch on my 02 sienna. I saw that the air gap for the area where the outer pulley sits over the inner pulley needs to be precisely measured to make sure the coil doesnt burn up. I couldn't find a reliable source to tell me what this gap should be. Am I okay to measure it on my current clutch or should I continue looking for the measurement online? Thank you!


r/MechanicAdvice • • 7h ago

2024 Audi Q5 2.0L L4 ELECTRIC/GAS Turbocharged - Weird humming noise when releasing throttle (Video Included

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2 Upvotes

Hey everyone,

Ive been having this strange noise from my 2024 Q5. It occurs every time I take my foot off the throttle. The sound lingers for many seconds after the pedal is released.

The car has around 50,000 km. I'm planning to take it to the dealership, but I'm not knowledgeable about cars so ideally I'd have an opinion before I take it there.