ok heres the problem...the car idles fine but when you gas it theres a knocking sound coming from the head or block but i'm not sure where its coming from...a loud knocking sound...please help...I need your response on what you think it is....I need your advice so i can fix my car before i go home....

 

does it sound metallic?

 

i think so....its sounds like there maybe something loose in the valve train but it also sounds like it might be coming from the block....

 

maybe take a video or soundclip perhaps? That would help out bigtime if u can get either.

 

Sounds to me like a rod bearing is going out.

 

I think its a rod bearing also....Cause i let the car idle for about 40 minutes and the knocking go worst and the motor is idling low now(about 500 rpm)....and you can hear the knocking noise even when its idling now..yesterday the motor was fine when idling..but now u hear the knocking at idle....so what do u guys think...still need your help...

 

check your oil pressure.

 

Def sounds like a rod bearing. I just had the same thing happen to me. I thought I might have bent a valve but once I removed the head and saw that everything was 100%, it was easily ruled out as a rod bearing. Always check your oil!

 

So did you change out the rod bearings only or did it do any damage to the crank or rods? AlsoDo u guys think it might be a bad oil pump??????Will a bad oil pump make this kinda sound...the sound seems to be coming from under the cyclinder number 1..thats why i thought that it might be the oil pump...let me know

 

The noise in my motor was also coming from the #1 cylinder. The oil pump wouldn't necessarily make any noise... except your rod bearings when it's not pumping enough oil throughout the motor to keep it properly lubed.

 

so did u fix urs already?????....I think I over torque the rod bearing caps and the main bearing caps...cause after i assemble the motor.....the crank was hard to turn...i mean hard....i had to use a long *** breaker bar to get that damn thing to turn....I thought it was fine but i guess i was wrong....but oh well i guess i learn my lesson....

 

cehck the oil for metal i would def drop the oil pan and pop the rod caps and check the bearings.If its that you porbably need a new crank or have yours polished.do not even start the car or your gunna kill your motor

 

if your oil was really dirty that would cause it. how did it happen?when did it start?

 

Well i put the motor together myself.....I over torque the main caps and rod bolts by 10 ft-lbs...