|
i have a serious question....
alright, my motor started knockin the other day, every thing is new though bearings rods pistons and all, so i pulled the motor and found that three of the oil punp bolts had vibated all the way out, meaning that thee was only one left holding it together, so i put some lock tight on them and put everything back together.
heres he question can the oil pump cause the knocking i was hearing? :( |
QUESTION IS,..WHAT IS CAUSING THE VIBRATION ?????
was the rotating assembl balanced correctly, etc,.... or was it not assembled professionaly is it a 454 bbc ??? |
Oh boy does this post bring back some bad memories, I had a similar experience except mine ended in a destroyed engine. They were probably just lose from the oil pump manufactor (melling of mexico).
Since then I always remove the oil pump cover bolts and generously use red loctite on them. NOTE: They're usually lose or close to it. The knocking probably was due to the loss of oil pressure, motors tend to do that when they dont have any oil pressure. I also reccomend a great big low oil pressure warning light positioned at EYE level, another thing I learned tearing that motor up, no oil pressure kills motors in a hurry. Goodluck, Cp |
Re: i have a serious question....
Originally Posted by bowhay
heres he question
can the oil pump cause the knocking i was hearing? :( Curtis |
yes the rotating assembly was balanced
and i checked the mains and few of the rod bearings and they all looked good it almost sounded like the pump was rattleing around and hitting the oil pan its a 350 sbc bored and stroked to a 385 |
Bowhay,
I hope that didn't sound like a smart*** answer. How long did this motor run? Glad you could hear it over the exaust. If you don't mind who's pump was this? I have always taken apart new pumps and checked the gear clearance to cap dimension making sure it is .002-.003. I run a machine shop so I know how guys will let tolerances wander. :( I hope nothing was hurt in your motor. Curtis |
it was just a stock replacement gm high volume pump
was intstalled about a year ago, and i just put it back in i didnt check the clearance but i didnt think it was necessary beacuase it had run for the entire time that i have had the truck i really dont know i just hope that when i get all the electrical hooked back up i can start the motor and it wont knock |
Originally Posted by doorracer
Bowhay,
I hope that didn't sound like a smart*** answer. How long did this motor run? Glad you could hear it over the exaust. If you don't mind who's pump was this? I have always taken apart new pumps and checked the gear clearance to cap dimension making sure it is .002-.003. I run a machine shop so I know how guys will let tolerances wander. :( I hope nothing was hurt in your motor. Curtis |
I just added the part about checking the clearance as a std. course of prep that I do on a new pump. This also makes sure the bolts are tight when I put it back together. Sounds like the bolts must have been a little loose and I have heard that high volume pumps will the possibility of chatter or vibration. Not sure how true that is just things that I have heard through the years. I never run a high volume pump myself in a SBC, have never found the need for it with the clearances we run. I hope it doesn't knock also. Good luck.
Curtis |
What I would like to ask is, was there any metal in the bottom of the oil pan or in the oil filter?
|
| All times are GMT -8. The time now is 10:50 PM. |