Help please!!!!

[FAT TONY]

64 c10 it has a 230 inline 6 with a standard 3 speed floor shift, alright now my problem is a couple days ago i was having trouble turning it on so i cranked it up and kept on pressing on the pedal and at one point i had the gas pushed all the way down and it turned on but rite after it turned on a loud grinding sound came from the engine area i went to check and it was the blades on the alternator had some how bent i guess it was the high rev that it got from the gas pedal being all the way down so i fixed that problem but coupe days after i was adjusting the valves on top and you know how messy that gets some time i think it leaked around one-two quarts of oil and i noticed that when i heard loud grinding coming from inside the engine rite away i thought oh it must have low oil but i filled it up again and the grinding sound continued and its not like constant grinding its more of every couple seconds some times it sounds loud and some times you can barley hear it but it still worries me because i don't even what to touch it till i know what it could be....... by the way the grinding noise sounds kind of like when you scrape a metal pipe on concrete , if any one has any idea of what it could be id really appreciate it

[losthope]

you sure its still not the blades on the alternator? If that was what was making the noise in the first place id start there,maybe its still bent touching every once in awhile...its hard to say what it could be just by reading its a grinding noise, bu if i couldnt pin point where the noise was coming from with the engine running i would get a mechanic's Stethoscope :http://www.google.com/products/catal...ed=0CDkQ8wIwAA and start listening at every thing the belt runs on and see it anything needs to be replaced(on old water pumps ive seen the water wheel inside be rusted and come apart good idea to replace if its a old unit just for piece of mind),alternator,water pump, etc. , then id move on to listening to valve covers and motor.

[E911manager]

Hmm, alternator blades don’t just "bend" without help. How did you fix the bent blades? My first thoughts is a bearing or sleeve in the alternator is gone and is probably about to lock up. When it does your belt will smoke or just come off then your water pump stops then you are looking for a motor..

If the alternator fans had they kind of force on them then it probably got the bearing. It may have a bent shaft also. I would check your motor mounts too. The motor could be flopping around and when you revved it up it flopped into something. But something moved around and the alternator had to have hit something.

You can do the poor mans noise finder and take a wooden stick or tree branch and place one end on what you think is making the noise and the other end on your ear with your hand cushioning it. As you move the stick from place to place you should narrow down the sporadic noise to a certain location. (SAFETY BULLITAN: make sure the stick is longer than 2-3 inches or you'll get you head caught in the fan!!!), 2-3 foot should work..

[FAT TONY]

well today i am going to give it an oil change and put an lucas additive to see if it helps any and i might buy a mechanics stethoscope to because lately ive just been using a piece of hose to find the noise but its pretty hard finding the noise when i have the lifters ticking every second as well, and the alternator blades were bent out i was turning it by hand and saw that it was hitting on the bottom bolt that holds the alternator in place and i fixed that by using some pliers and bending them back straight... also i noticed that when i turn the engine by hand you can hear like a sort of sizzling sound coming from inside kind of like when you put water on a hot frying pan... also after bout ten minutes of being on when you turn it off you can hear a ticking every two seconds coming from around the valves, i don't know what that could be ether

[T2vigil]

If there is a possibility it is the alt. take the belt off and start it up and see if the sound goes away.

[FAT TONY]

is there a way that i can upload a video or sumting that way maybe you can see my engine running and kind of have an video of the sound it makes

[aerotruk63]

YouTube Tony! Then SHARE the link to the thread.

[Rich 5150 69]

Originally Posted by FAT TONY

... also i noticed that when i turn the engine by hand you can hear like a sort of sizzling sound coming from inside kind of like when you put water on a hot frying pan... also after bout ten minutes of being on when you turn it off you can hear a ticking every two seconds coming from around the valves, i don't know what that could be ether

The first condition you describe is the compression leaking past the rings when rotated by hand..... the second I surmize is the engine just cooling off.

[old cruiser]

Originally Posted by T2vigil

If there is a possibility it is the alt. take the belt off and start it up and see if the sound goes away.

I to would try this BUT DON'T let the motor run very long as the water pump won't be running without the belt on

[FAT TONY]

So with that am i going to have to buy new rings?.... and it only happens some times not all the times that i turn it by hand , and what could be the cause of the leaking?

[FAT TONY]

Originally Posted by old cruiser

I to would try this BUT DON'T let the motor run very long as the water pump won't be running without the belt on

so what do i do i just loosen the alternator take off the belt and crank it?....... this is my first project so im barely starting to learn

[Rich 5150 69]

Originally Posted by FAT TONY

So with that am i going to have to buy new rings?.... and it only happens some times not all the times that i turn it by hand , and what could be the cause of the leaking?

No that would be normal....its when the piston comes up on compression stroke...compressed air has to go some place.

[FAT TONY]

true..... well tomorrow ima try that running it without the alternator but i don't think that's the grinding sound coming.... and if its not is there any other possibilities of what the grinding could be? when i started hearing it i was adjusting the valves could i have done something wrong were it made something start grinding?

[Rich 5150 69]

Originally Posted by FAT TONY

so what do i do i just loosen the alternator take off the belt and crank it?....... this is my first project so im barely starting to learn

Yes take the belt off, start truck ( not for more than five minutes ) see if noise goes away, if it does its your alternator, if not you`ll have to keep looking.

[FAT TONY]

alright as soon as i get home tomorrow i will try that and i went to advance auto and bought me a stethoscope so hopefully it will be easier to see where the noise is coming from

[FAT TONY]

this is my engine ... well rite now it has new spark plugs and wires but still basically the same... and tomorrow i will post up a video of my truck on so y'all can see the engine running and the noises it makes

[Rich 5150 69]

It might be better if you got pics of the alternator and fan belt assembly....

[FAT TONY]

ill try to get better pictures tomorrow its kinda to dark to take pictures rite now but here is one i found

[losthope]

Originally Posted by Rich 5150 69

Yes take the belt off, start truck ( not for more than five minutes ) see if noise goes away, if it does its your alternator, if not you`ll have to keep looking.

dont forget taking off the belt stops turning your water pump also, so if the noise goes away it could be the alternator or the water pump, when you take off the belt try turning the waterpump and alernator by hand and see if you can feel or hear anything unusual.

[FAT TONY]

well that's another thing the noise doesn't start rite away it takes bout 5 - 10 minutes for it to start making the grinding noise i guess it has to warm up

[E911manager]

AHHHH Bearing in the alternator!!!!!!! It gave way when you revved the engine causing the shaft to move enough to bed the blades. Now when you start it is heats up and the noise starts and it can be intermittent just like you are describing. Been there done that..

You may just pull the belt off, grab the end of the alternator (with the engine off) and if the shaft moves around then you got a problem.

You can rent a compression tester at auto rip (zone) and run compression on each cylinder. They should come out pretty even at around 150 PSI (+/- 120 PSI)

[FAT TONY]

so the alternator is toast if the shaft moves around ..... does this mean that with a new alternator the noise might go away?
and ill try to go tomorrow to auto zone and see how much it is to rent one

[E911manager]

Yes the end should not move around. And it should be free with a small deposit. Again alternator fins don't bend unless they hit something. There should be no movement in the shaft.
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[FAT TONY]

i went out rite now and tried wiggling the shaft but i didn't feel much movement..... now when i turn on the truck without the alternator or water pup connected should i let it heat up with the alternator connected till i start hearing the sound and then take of the belt or do it while its not warmed up yet?

[E911manager]

It won't have movement with a tight belt around it. I would watch them temperature close cause you can overheat it quick with the belt off. I would say warm it up till it starts making the noise then pull the belt off and check it. But again a warm engine running with no water running through qauals blown head gaskets or worse.
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