Check it

[ogliquidmetal]

Okay so i was revving .. i got to 5k rpm and felt a bump comming from the engine .. i have noooooooooooooo clue what it is .. can someone help me out ?

[worldpower]

How do you feel a bump? Do you mean you heard a knock?
If you did it,do you do regular oil change,because maybe A piston broke.

[SmaartAasSaabr]

Hmmm... your engine threw a rod and the bump was the piece of the engine block that broke off hitting the firewall

[MerkXRTurbo]

"Bump" is so nondescriptive. Is it continuous? Does it get faster as the revs do? My first thought was a rod knock.

[ogliquidmetal]

i recently had an oil change .. how do i find out of the block is broken ?!

[ogliquidmetal]

well .. the engine spins faster as the rpms go up, i was in neutral so the car wasn't rolling .. after the bump, i lowered it down to about 2-3k rpm .. and it doesn't happen at 2-3k rpm i havn't tried to hit 5k again cuz i'm scared lol

EDITL Okay so i got my engine to 4k rpm .. but when i turned on my car, it choked a little before it started!!! now i'm getting really scared ..

[AirMoore]

EDITL Okay so i got my engine to 4k rpm .. but when i turned on my car, it choked a little before it started!!! now i'm getting really scared ..

I hate to say... you should be! I mean revving an engine (especially that high) under no 'load' is terrible for it, it is well known to 'stretch' parts, if not completely break them.


I would say try to describe the noise a bit better, your simply leaving us in the dark with 'bump' (as someone said).

I would say take it to your local mechanic, or auto-parts store, and have them check it out... tell them what you were doing (they will give you a :shock: look) and ask them if they could have any guesses what it is.


Also - A piece of your engine block did not fly off and hit your firewall after a rod went through it (SmaartAas is being a well... ), trust me if that happened... you wouldn't be describing a simple 'bump'.

BTW: What does your car redline at?

[SmaartAasSaabr]

One good idea is not to actually rev the engine without a load (ie actually in gear pushing the car) as this is hard on the main bearings, and to be honest is entirely pointless...

[ogliquidmetal]

redlines at 7k =] hehehe

so anyways .. it just like .. some gently rear ended me .. but from the front .. lol

another person also suggested a broken valve ..

[SmaartAasSaabr]

Also - A piece of your engine block did not fly off and hit your firewall after a rod went through it (SmaartAas is being a well... ), trust me if that happened... you wouldn't be describing a simple 'bump'.

You would have a simple bump. Then nothing... been there done that

If the engine runs fine, then I wouldn't worry. A broken valve, you would KNOW this every time the engine was turning. A bent valve, this would make one hell of a racket. You just had a simple "bump"?