/r/MechanicAdvice

Photograph via snooOG

This is more than a car repair forum!

MECHANIC CHAT:

Join the /r/MechanicAdvice IRC for instant conversations with other users on libera.chat irc network.

PART TRADING:

If you have parts you would like to trade please do so at r/partIt

If possible posts must include the make/model/year in the title or body of the post. If that isn't available, provide all you know and explain why.

All bodywork, accident damage, paint, dent/ding questions. BELONG in r/Autobody or /r/Diyautobody/ Do not ask for an estimate there as it is against the subs rules. Questions of this nature will be removed


RULES

Please Take a Moment To Read The Rules Before Posting

1) Advice Format. This is a subreddit for asking Mechanical questions pertaining to vehicles, engines, etc. If it's got wheels, treads, floats, flies, or has an engine you're good to go and we'll do our best to help. Showing off w/out a question goes in r/justrolledintotheshop legal/insurance questions go in r/legaladvice or r/insurance. Title, salvage, body work, paint work, etc questions also dont belong here. Memes, youtube videos and other non questions are not allowed

No intentionally bad, harmful, or deceptive advice. If we feel a piece of advice is particularly reckless, dangerous, or extremely unhelpful it maybe removed If a post or comment is provided that is not a response to a question, the post may be removed. Please report bad advice to the mod team.


2) Keep discussion friendly, civil, courteous, and professional. We're here to help so being rude won't help. Dont assume a shop is trying to "rip you off." It's okay to ask for a second opinion.

Golden Rule: If you have nothing nice to say, don't say anything at all. Those who demonstrate they cannot follow the rules will be warned and posts removed. Those who continually cause issue will be removed


3) Only one vehicle/problem/incident per thread, and only post once. If you didn't get an answer the first time, or you don't like the answer you got that does not mean you post it again. Do not post asking questions of your own in someone else's post

The only exception is for posting updates, provided it is properly marked as an [Update] or similar.


4) Spam/Self-Promotion/Improper Linking/advertisements. Linking to outside content is not allowed, unless it's germane to the discussion. We allow links, pictures, video, or audio file to help diagnose your problem. Linking for the purposes of promotion (eg offers/coupons/self blog posts/youtube/advertisements/how to) is strictly prohibited and will result in a permanent ban. This is a zero tolerance policy. This isnt a place to post your youtube channel, advertisements, memes, shitposts or business


5) Personal Information. Sharing personal information, or specifics on /r/MechanicAdvice is not allowed. Please do not name the shops specifically (unless part of a chain) This is not a review forum for specific shops.


6) Body Work. /r/MechanicAdvice is a sub for mechanical questions. Questions related to dings, dents, accidents, paint and so forth DO NOT belong here, please post in /r/Autobody r/AutoBodyRepair/ or /r/Diyautobody/ Take the car to an auto body repair shop who can give you a qualified estimate.


Asking for an estimate in r/autobody is against there rules. If you have insurance/total loss questions please ask in r/insurance.


RIP-OFFS, SCAMS, & SECOND OPINIONS

You may ask a second opinion on a quote/repair from a shop. However, please observe rule #1 when asking for a second opinion. It is considered rude to ask, “Is the shop trying to fleece/rip me off?” You wouldn’t ask “Why are all cops pigs?” on /r/AskLeo, ask about Creationism on /r/AskScience, or talk about vaccines causing autism on /r/AskDocs.

Generally there is a good reason why a repair costs what it does. We are more than happy to help you figure out why a shop wants to charge you for a repair, and we will tell you if it is unusually high. We are also happy to advise on how you can save money at the shop. Please read the sticky post on the subject for details.


IMPORTANT

Understand that the assistance you receive is ADVICE ONLY and is given with the understanding that the giver assumes no liability for any damages that occur as a direct or indirect result. It is impossible for a mechanic to diagnose your problem accurately without seeing/hearing the problem with his own senses. Any advice you receive you must use AT YOUR OWN RISK.


OUR PARTNER SUBREDDITS:

*r/Diyautobody * /r/Autobody * /r/Bigroad * /r/RandomActsOfMechanics * /r/howsmytire * /r/PartIt * /r/Justrolledintotheshop * /r/ProjectCar * /r/UserCars * /r/AutomotiveTraining * /r/Hookit * /r/Trucks * /r/AutoDetailing * /r/ToolPorn * /r/DieselTechs * /r/TechniciansAdvice * /r/aviationmaintenance * /r/howsmytire

/r/MechanicAdvice

1,403,423 Subscribers

1

Switchback led

My switchback leds will light up white when I turn the drl on, ONLY, when I have a halogen bulb in the other socket. If I have switchback leds in both sockets, there just amber, acting just like normal amber leds. Do i need resistors?

99 jeep cherokee xj 4.0l

1 Comment
2024/11/09
21:49 UTC

1

Ac compressor

I keep having squeaking issues in the last 6 months. I've replaced the crank pulley, Water pump pulley and the idle pulley twice now. The squeaking came back and the ac pulley is locking up now. Could this been causing all the issues in the last 6 months or is it likely that there is another issue that keeps causing all these serpentine problems?

1 Comment
2024/11/09
21:48 UTC

1

2000 chevy silverado 1500

What would cause my 2000 chevy silverado 1500 to make this noise when accelerating?

1 Comment
2024/11/09
21:48 UTC

1

If air in the braking system but no leaks , would you then point your finger at either the master cylinder or ABS pump/module

Hey guys , still learning as a mechanic.

Im asking this hypothetical if I ever encounter it. I remember if you have a air in the brakes to inspect for leaks.

However I also remember that if you can’t find anything either point your finger at the master cylinder. Is this how you would go about it? How would you differentiate between an internal leak in the master cylinder vs ABS. Cause I know it’s a pain to unbolt both of them just to check if there’s a leak.

1 Comment
2024/11/09
21:48 UTC

1

Repeat Head Gasket Failure 🙄

2015 Jeep JK Wrangler 165,000 miles Pentastar V6 3.6L

This summer, passenger side head gasket blows. Lots of white smoke and passenger side misfires galore. No overtemp indicated on the temp gauge but the sensor is in the driver side head. I tear everything apart to replace both head gaskets. Only oddity I see is that in the passenger side head there is some scorched oil residue around the valve train - def had some excessive heat in there. Driver side looks perfect. Both heads and the block are still super flat - def within flatness spec per the factory manual. Pop in the new head gaskets and put everything back together. For 200 miles it runs like a champ. Then one day I can suddenly smell coolant again and there is white smoke at the tailpipe. No misfires or check engine light but plenty of smoke. I’m happy to tear it apart again but not if there isn’t some probability of actually fixing it for good this time. I can’t believe it would be something as bad as a cracked block or head since it worked so well for 200 miles after the first repair. Any thoughts on why it might have gone bad a second time and what I should be looking for? Thanks!

1 Comment
2024/11/09
21:45 UTC

1

2000 chevy silverado 1500

What would cause my 2000 chevy silverado 1500 to make this noise when accelerating?

1 Comment
2024/11/09
21:44 UTC

1

How to remove oil filter Yamaha Roadstar 2003

Trying to change the oil on my motorcycle but the filter was being stubborn and basically felt like it was welded on. Tried making a hole and using a screwdriver as leverage but it did not work. Also tried using the oil filter clamp remover but did not have much success. Any tips to get it off?

1 Comment
2024/11/09
21:43 UTC

1

Losing oil

Have a 2004 Infiniti G35, holds 5 quarts of oil, and I recently changed the oil right about at the 5000 miles the filter was rated for. When I emptied it only a half quart came out! Doesn’t look like it’s leaking it. Don’t know if anyone has any ideas about how to stop it or how bad this might be for the engine?

2 Comments
2024/11/09
21:41 UTC

1

Genuine Question here

Is a 2010 suburu Forester with 79k miles for 10k a better financial decision than a Toyota RAV4 for 10k with average miles of probably 120k.

1 Comment
2024/11/09
21:38 UTC

1

Oil leak a few days after rear end

Hi all, just wanted to get a sense on the likeliness this was caused by a rear end.

Last week, got rear ended on an interstate. We exchanged insurance and I have been working with their insurance and a shop to get the bumper replaced and a rocking issue going on fixed. I have been driving it to and from work the last few days and suddenly today it lost all oil leaving my driveway. Luckily I was able to circle around and get it on my street within a minute a so.

Am I crazy to think that the oil pan or head gasket could’ve been damaged and just cracked after a few days?

I had the car in for maintenance the week before the accident and they did an inspection, noted a few parts coming to EOL, but didn’t note any other concerns.

1 Comment
2024/11/09
21:36 UTC

1

Oil Pump/Timing Belt

Should I replace oil pump and timing belt together, or can they be replaced one at a time?

Oil pump is the main thing I need replaced. Can I change that first, then reschedule for timing belt?

Thanks for the help!

1 Comment
2024/11/09
21:35 UTC

1

How much harm does hard acceleration do to an otherwise well maintained engine?

Hello all,

I'm curious how much harm it does to my engine when I hard accelerate. I have a Hyundai Beta 2 engine which I baby on work days and I follow my car's maintenance care to a T.

On weekends I want to have fun. I'm much harder on acceleration and will take more mountainous roads so I can hear the beautiful hum on an engine (I know 4 bangers aren't 6 or 8 cyl but they still sound great at 4.5+k rpm). One day I'll get a more powerful car for track days, but until then I really enjoy what I have and want to know how much harm I actually do driving hard one to two days a week.

1 Comment
2024/11/09
21:35 UTC

1

Ignition failure

Hi there, i have a 2003 Honda Jazz . Tonight the key strruggled to get in the ignition and the rescue company said I need a new ignition barrel. Is this an expensive repair , I've just spent £750 on MOT and I'm reluctant to spend anymore. Thanks.

1 Comment
2024/11/09
21:32 UTC

1

Won't stop burping for the love of God. How do I make it stop?

4 Comments
2024/11/09
21:31 UTC

1

What’s going on with my car???

Okay so here’s what happens. This only occurs after my car hasn’t run in a while, typically first thing in the morning. The car shakes like crazy, and when I apply the brakes it completely stalls with the fuel and battery light turning on. Aside from this, if I let the car run for 5 minutes or so, and take off, this doesn’t happen. I feel like it could be so many things, like the fuel delivery, the brake booster, a leak, or something like that. Anyone know?

4 Comments
2024/11/09
21:29 UTC

1

Knocking noise when turning wheel 🛞

Hello! I have a 2011 hyundia elentra. I recently changed the suspion (sway bar. Ball join. Tie rod and strut) my drivers side. When I turn the wheel while stationary I get a knocking noise. When I hit i bump a get a knocking noise as if my ball joint or sway bar is lose ( sway bar/link kit). Very loud can't find the source. Have any ideas ? Also hoping it dangerous to drive.

1 Comment
2024/11/09
21:28 UTC

1

Is this tensioner pulley shot?

Has a slight grinding noise and wobbles when belt is on? Should I just replace whole assembly?

3 Comments
2024/11/09
21:17 UTC

1

2011 Jetta 2.5L Struggling Idle on Cold Starts – Strange Pattern, No CEL

Hey everyone, hoping to get some insight on an issue I’ve been dealing with on my 2011 Jetta 2.5L. I’m posting a video along with this for reference, but here’s what’s been happening:

When doing a cold start, the engine idle seems to struggle and sits really low, almost like it’s about to stall, before it slowly climbs back up. This issue originally came up a few months ago, and at that time, I replaced the engine air filter. That seemed to resolve the problem, but only for a couple of weeks before the low idle returned.

Here’s where it gets strange. Not long after, I washed my car, and unexpectedly, the problem went away entirely for about a couple of months. I know it sounds crazy, but it’s literally the only thing that was done around that time, so I figured it was worth mentioning.

Now, a few more months have passed, and the issue has come back with no warning signs or check engine light. I’m at a bit of a loss because there doesn’t seem to be a clear cause, and I haven’t found any obvious pattern aside from that odd car wash incident and filter replacement that seemed to have remedy the issue temporarily.

Has anyone experienced something similar or have any idea what could be going on? Any advice would be greatly appreciated!

P.S. Yes, I know the whole car wash thing sounds weird, but figured I’d include every detail just in case!

3 Comments
2024/11/09
21:05 UTC

1

2022 Hyundai Elantra making a ringing noise occasionally with AC on.

When I have the AC blower going, I hear this ringing kind of noise. Seems to be coming from behind the glove box. Any idea what it might be?

The noise dies out the moment I reach the dealership :/

4 Comments
2024/11/09
20:58 UTC

2

Cars starts too quick

I recently changed my injectors in my 2005 Chevy 6.0 with AC Delco normal injectors. My vehicle will sometimes start fine. Example when starting: crank, crank, crank then car starts. But also it will sometimes go just one crank and then struggle start. Any ideas? Hope my example made sense.

3 Comments
2024/11/09
20:49 UTC

0

Fan clutch bolt won’t break loose?

2002 Jeep Wrangler. Tried about everything including air hammer to try and get the fan clutch bolt to let loose. Can’t seem to get it. Any suggestions?? Pretty sure it’s the OG bolt.

6 Comments
2024/11/09
20:48 UTC

2

Just did rear pads & rotors (both sides) on a VW Tiguan. Passenger side is now grinding while braking.

Hearing a metal on metal sound on the passenger side while braking after doing a brake replacement with a 2019 VW Tiguan.

Basically, the sound you'd hear with worn out pads and rotors but they're brand new. Drivers side is not making this sound.

Took the wheel off and disassembled/reassembled all the brake components. There's a little brake grease on the back of the pad in contact with the piston...and I put a little on the ears of the pads as well.

I checked everything over and nothing looks out of place or wrong. Any common issues to check?

4 Comments
2024/11/09
20:42 UTC

1

Ford 3.3 v6

Hey guys, just wondering if any of you have any experience with the 3.3 v6? I have a 21 f150. Just curious if anyone’s got any tips or advice for the engine or if you’ve experienced any problems.

1 Comment
2024/11/09
20:41 UTC

1

Is this my transmission fluid fill port?

2018 Hyundai Elantra eco. As the title says. I decided to try to do a transmission fluid replacement myself to try to learn. Watched quite a few videos but all of them show a bolt with a square indent in it as the bolt for the fill port. In a similar spot in my car is this little rubber plug which looks much smaller than the port in all the videos. I pulled it out and it almost looks like there’s is no hole behind it. I figured I’d check here before doing something stupid and draining my fluid with no way to refill.

6 Comments
2024/11/09
20:41 UTC

1

How do scan tool updates work?

I have a question about scan tool updates, specifically Autel but other brands would be nice to know.

If I update my scanner after chosing not to update it for a few years, will the one time update add compatibility only for the year i update it, or also for the years i opted out to update? Do i have to pay for the years missed?

For example, if I bought the scanner in 2020, and did not update it until 2024, do i pay a one time yearly update fee to get all the missing features from 2021-2024 or do i have to pay for all 4 years to get full compatibility?

Thanks!

1 Comment
2024/11/09
20:39 UTC

1

Wheel bearing help

2006 Toyota Matrix base

Vibrates while going straight or turning left. When I turn right the vibration stops completely and then starts harshly again when straightening out the wheel. Worse at some speeds than others. Holding the brakes seems to quiet it down.

Based off of all this, I just replaced the front passenger wheel bearing. NOTHING changed about the vibration at all. Did I incorrectly diagnose the side? Do i need to replace the driver side bearing? What else could this be, a bit lost now after doing that wheel bearing for nothing.

1 Comment
2024/11/09
20:38 UTC

2

Crank no start. What’s the problem? 2001 Lexus IS300 2JZGE VVTi

Spark plugs were fouled out due to a valve cover leak. Last night I replaced my valve cover gaskets and my spark plugs. My coil packs are only 10 months old and shouldn’t need to be replaced. The plugs that connect to my coil packs aren’t there so it’s just the metal pieces that connects to the prongs on my coil packs (would add a pic of what I mean but it won’t let me). Last night it wouldn’t start, came to the conclusion of it being my fuel pump or the fuel pump relay. Replaced relay today, fuel pump vibrates when ignition is on so I’m sure it’s working. Any help is appreciated, thank you.

1 Comment
2024/11/09
20:36 UTC

1

2009 Toyota Tundra sat for 3 Months

I’ve got a truck that’s been sitting for about 3 months without being driven. The battery was dead, so I’m jump-starting it, but it’s taking longer than I expected. Just want to make sure I’m following the right steps to get it started and to check if there’s anything I should be cautious about that could indicate a bigger issue.

When I try to start it, all I get is a clicking sound with no engine turnover. Is this normal for a vehicle that’s been sitting unused for a few months?

3 Comments
2024/11/09
20:36 UTC

1

Hood, or trunk light

2002 VW beetle. Is the light on the bottom left for the hood or trunk, or something else entirely?

2 Comments
2024/11/09
20:31 UTC

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