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the car has about 65,000 miles on it or so. i know i know, its been about 50,000miles sense the last oil change, which was at like 14,XXX miles. my brother drove my moms car to work, without any problems. on his way home from work he heard the knocking and the oil light came on, and the knocking sound was there. it was loud enough to know the oil was low. he drove it slow down the road not rough at all. when he got home we changed the oil. we put 5w-20 in, as thats what it says to put in it. we started it up after the oil change, still a little knock but nothing what it was. we drove it around a bit and on acceleration up past about 2,000RPMs it was there. we figured it needed to be worked in. we drove it around a bit longer and decided to head home. we were almost home and we soon found out that the knock was worse than it was than when we first started it up after the oil change. we took it slow and it stalled. we called it quits and towed it home to prevent further damage.
got any tips on what i should do? im thinking it needs thicker oil, and possibly the oil pump is dying? or could it be that the worst has happened and it needs to be rebuilt?
just let me know what you think it is and ill test it however which way. Thank you very much! i can make a video if needed or provide pictures if needed. Thanks again!
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If you drop the pan and look at the rod caps I think you will find one that looks like it has been hot – it should be a purple color. This means you have spun a bearing.
Anyway, if you find what I describe above the answer is rebuilt.
okay, is there a way i could tell if the knocking sound is coming from the bottom half of the engine, or the top? and okay. i might do that tomarrow, but i dont want to over step it. there was oil in it, but there may have been maybe a quarter inch of oil at the bottom of the dipstick. when we changed the oil, there had to have been maybe a bit more than a quart of oil in the engine?
also, if i do drop the oil pan, will anything come out? like oil pump or anything else that could be in there? obviously oil will come out, but any parts that i need to be aware of or anything?
Thank you for replying!You can post a video if you like but I have few doubts that it has a worn out or spun connecting rod bearing. You can install 80w90 gear oil and it’s not gonna repair the damage already done.
I’m sure you now know that regular oil changes would have been much cheaper than it’s gonna cost now.
oh i fully understand that. i didn’t think the oil was nowhere near that low untill today. if i knew it was that low, i would have put oil in it and changed it already.
is there anything else that you could think of that i could test to see if it could be something else?
With these modern engines even I have trouble telling where a knock is coming from. So, that is why I suggested going directly to the rod bearings and checking. As far as pulling the pan, most people can accomplish that. However, the questions you are asking causes me to suspect you are not experienced in auto mechanics. If you don’t know what you are looking for, sometimes it is very obvious and sometimes not. Probably best then to leave it to a professional. Have them at least do the inspection and report back to you.
Anyway, here are a few of videos on the subject.
oh, i know quite a bit about mechanics, i just don’t want to take it off because i don’t think that the knocking is coming from the rod bearings. a couple of my friends know much more about it than me, and they say it sounds like its a rocker for the valves.
thank you for posting the videos. you were 100% correct about the rod bearings. i took it up to advance auto parts and they told me that the sound is coming from the lower half of the engine. i put some locus oil stabilizer stuff in it, and it seems like it lowered the sound of the upper half of the engine. but the knocking is still there from one of the rod bearings. i used that exact technique to find out which piston had the problem and found out which one it was from the 3rd video you posted. i dont know how badly damaged it is, but ill be calling a couple places tomarrow for prices. thank you again!
If it is a bearing what happens is tiny metal particles get circulated throughout the oiling system. If this isn’t all cleaned out you will have the same problem again even with new parts. On the other hand, this being a nearly new car it may be easy of obtain a low mileage engine from a wrecker.
that is very true. we were going to take it to a shop and have them deal with it. for the main reason i dont got the tools to take the engine out and rebuild the bottom half of the engine. plus it would probably be done much better if a shop done it.
It does sound like an issue with the bottom end. I do not recommend using thicker oil as that can make the situation worse. I also do not recommend rebuilding the engine as that may be a waste of time. I think you’re better off with a reman engine with a warranty or a salvage engine. You might find both here.
You might find this useful the next time you have an engine noise.
http://www.ericthecarguy.com/faq/diagnosing-noises-in-your-car
And this
Good luck and keep us posted.
we put it in the shop yesterday. they said it would be better to put an engine in from the scrap yard due to the cost it would be to rebuild the engine would cost more than another engine. sadly, they said it would be like $2400….. i looked on the site and it said the closest one would be like 130 miles away.
I agree, it’s much more cost effective to replace a modern engine than rebuild it. $2400 doesn’t seem too bad considering.
Good luck and keep us posted.
Did I read that right? The last oil change was 50,000 miles ago? Please tell me that was a typo.
If that was the case that’s more than likely what cause the issue to begin with. When you do have a new engine put in I wouldn’t let things go that far.
yes. sadly you are reading it right. last oil change about 50,000miles ago. with the new/newer engine in it, its gona get changed much more frequently. i wasent the one that went and got the car so i dont know what was wrong with it. but more than likly one of the rod bearings got too hot and got scored too much.
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