Big trouble or not?????
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This is a discussion on Big trouble or not????? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; So I am driving and noticed a knocking noise it is loud in low rpm and loud. Then i speed ...

  1. #1
    Registered User connorrock's Avatar
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    Big trouble or not?????

    So I am driving and noticed a knocking noise it is loud in low rpm and loud. Then i speed up and it goes away and comes back at higher rpm. So when i got home and popped the hood and reved it in neutral the noise hits at the same rpm pretty loud knocking from the top middle area of the motor. What the hell did the motor blow ? No noticed loss of power no overheating and plenty of oil what could this be ???? Thanks so much for your help...

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    Moderator T0rque's Avatar
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    Probably a rod knock. You won't really notice a loss of power til the bearring is really gone.. But I'd suggest never getting to that point if you want to rebuild what you have


    Lead Wrench @ WTF Tuning, LLC

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    Registered User connorrock's Avatar
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    Crap really ? What would something like that cost?

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    Moderator T0rque's Avatar
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    Lol that's just an educated guess my friend. I can't diagnose what I can't see, hear or touch


    Lead Wrench @ WTF Tuning, LLC

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    Registered User connorrock's Avatar
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    Lol well let me go ahead of myself and ask if it is what would it cost to rebuild the engine ? Would it be cheaper to buy a new or used engine? Im scared

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    Resident meany-rator 06wrx4me's Avatar
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    Usually cheaper to buy a new short block then rebuild the engine.

    You can buy new or used short blocks.

    Used ones in good shape go for about $1000+.
    New ones were between $2000-$3000 last I checked.

    Rebuilds vary wildly depending on how serious you get with the parts list.

    Pistons $350-$750
    crank new $500-$700
    crank machined $150-$300
    rods $750-$1000
    bearings few hundo
    gaskets (few hundred$)
    belts (hundred or two)
    machine work depending on severity $500-$1000
    cams (expensive)
    heads (expensive)
    valve work
    valves

    and the list goes on.

    Personally I'd buy a new short block and potentially do some head work.
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    Registered User Heide264's Avatar
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    Has the car been modded or anything?
    Quote Originally Posted by Trainrex
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    Registered User teflon_jones's Avatar
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    I agree sounds like rod knock. It goes away at certain RPM because it reaches a harmonic point where it isn't going out of its normal travel path. Think of what happens with an unbalanced tire sometimes. It can shake like the bejesus at 50 mph, mostly go away at 65, and at 80 feel like the car is going to shake apart again. Same basic idea.
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  10. #9
    Registered User connorrock's Avatar
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    Thanks everyone. To answer someone question the only mods are cat back exhaust and a knn air filter. My dad came by today and said O YEA that motor has to come out. He said sounds like a shaft bearing went out. So great it has 90,000 miles and i still owe 7k on the car and my motor is shot! So I really need help on a website where i can buy a short block or suggestions on what is better to buy as far a a junk yard engine with low miles or what to do. My dad said he has put one of these engines in before and would help me do all the work. I am 28 years old but little scared of the whole engine thing but would love to learn this motor inside and out. So at least the labor will be free (me). Any recommendations. As always thanks !!

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