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I just replaced the oil pump and oil pickup on my 1995 Acura Integra because I had a low oil pressure light on. Now I have discovered that when I crank the engine, it will not idle because of a crankshaft issue that is causing a very loud, constant grinding noise. Could this be due to bad bearings or maybe something got severely damaged? I’m going to drain the oil and check for shavings as well as examine the crankshaft through the oil pan housing. I would really appreciate some information.
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So it wasn’t making any real noise before replacing the pump?
Unless the pump was the wrong one and it is eating itself alive, it sounds like you may be in for some serious engine work.
If you remove the pump again, hand crank the engine (using the flywheel bolt) and see if it rotates and what noises are present. Well also try that with the oil pump attached.
The problem there is – if the pump was grinding, it may have clogged some of the oil ports with metal shavings.
The bad news is that internal lower engine damage is not easy to fix. If it were something in the heads like bent valves that would be one thing but crankshaft bearings – May be time to decide if you really want to keep this car.
Well, it’s not the oil pump, because before I got the old one off, i thought it was because the harmonic balancer bolt was on too tight. I couldn’t even get it off with an impact wrench. I eventually got it off and at some point. After the job was done, the noise was still there. The oil pump is definitely the correct one. Looks like the exact same thing as the old one, it fits it and all. So I can rule that out.
When I had low oil pressure, there was a point when i was driving, where the engine just shut off on me. I thought it might have locked up. I was so close to getting home, so I cranked it back up and limped home. It did not run well at all. I did notice the engine was running louder than usual as if it wasn’t being lubricated. Hence me replacing the oil pump.
To make things even more fun, is I have to do all of this with the engine in the car. I have no way of taking the engine out. That would honestly make things easier.
I want it supercoated. Lol. I got it to idle through the grinding but not for long. All I really want to know is what would be causing this sound.
[quote=”Dylonious94″ post=112638]I want it supercoated. Lol. I got it to idle through the grinding but not for long. All I really want to know is what would be causing this sound.[/quote]
Fair enough. If I was going to sugarcoat it I’d say it’s possible you might drop your oil pan and find a village of pixies running a rock polishing factory…Anyway, inside your engine, there are parts that are designed to never touch each other during normal operation. As an example, the main and rod bearings shouldn’t be in direct contact with their respective crank journals. These items are kept apart by a thin film of oil under pressure. When that film goes away (whether due to lack of oil pressure or volume) these parts touch and things get ugly… or in your case, noisy.
Though sudden loss of oil pressure can be caused by a failed oil pump, it usually stems from other problems. A clogged oil galley or a “spun” rod bearing are a couple of examples. The fact that you’re hearing a grinding noise would suggest that even if your problem originated with a failed oil pump… you have more than that on your plate now.
To be honest, there could be an alternate cause for your symptoms that can be rectified at a reasonable expenditure of time and money… but none are springing immediately to mind. Of course, I am assuming that description of your symptoms are accurate. Perhaps the noise isn’t coming from the crank region? That’d be a little ray of sunshine. Hopefully somebody else will chime in.
Good Luck
If there is serious internal engine damage, at this point it doesn’t matter exactly what is grinding. The engine will probably have to come out for a rebuild (if that is even practical) or replaced. Upon disassembly you would see what crapped out but there probably isn’t much you can do with the engine still in the car.
Don’t go out buying random engine parts because you THINK this or that might be ruined.The best you can do now with the car is either plan on an engine OR post it on craigslist saying “Engine locked up, $500 OBO”.
So I have gotten far enough to where I can see the crankshaft under the oil pan housing. Crankshaft seems fine so far. It’s just when I turn it by hand, there is a point where it is quite difficult to turn. It’s easy to turn on one portion of the rotation, then there is a portion where it is hard to turn.
Well nevermind. I just had to take the spark plugs out so the pistons wouldn’t compress the air. I did find tons of metal shavings in the oil when I drained it out.
One thing leads to another. I’m now just finding out about priming an oil pump, which is something I did not do. I listened to the sound again, and it sounds like aluminum grinding sound as well.
I really appreciate the help. Not quite what I’m looking for, but it’s definitely something I can consider and really helped me eliminate some possibilities. Thanks.
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