valve job problem
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Senior User
Joined: May 2009
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From: Albany OR
valve job problem
Watch this video an tell me if the rocker arms should do this.
YouTube - 100 0249
I also want to know what rockers arms an push rod should i get for a 93 f-250 460.
YouTube - 100 0249
I also want to know what rockers arms an push rod should i get for a 93 f-250 460.
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Joined: Nov 2008
Posts: 276
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From: Nashville NC
Looks normal to me.
I would be more worried about if it didnt have any wiggle & was real tight like it was sitting on a cam lobe & realy wasnt. Tight like that would indicate the valve has beat up into the head & was way to much preload on the lifter & rocker arm.
Mighty black in there, not much cleaning going on from the type of oil used or a whole bunch of mighty short trips & the oil not getting hot enough to do its job.
Neil
I would be more worried about if it didnt have any wiggle & was real tight like it was sitting on a cam lobe & realy wasnt. Tight like that would indicate the valve has beat up into the head & was way to much preload on the lifter & rocker arm.
Mighty black in there, not much cleaning going on from the type of oil used or a whole bunch of mighty short trips & the oil not getting hot enough to do its job.
Neil
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From: Albany OR
ok cool i am just trying to find out why it is knocking what would be the most common thing to look at for a knocking noise? Dose the thing that the valve an rockers arms are in come off? Sorry i had a brain fart an cant think what the name is for the thing that the valve an rockers arms are on. Head right?
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From: Nashville NC
Now I'm just going by as black as those rocker arms look, but, how much oil presure does the engine have at first start up cold & then when hot, how much at idle & then going down the road.
The knock your hearing, is it a hard clunk, a rattle clunk or a jingle rattle.
yes, those things the rocker arms bolt to are called the cylinder heads.
Something I noticed in the video, those rocker arms dont have the little thin metal splash guards in place.
Those splash guards, would make the oil as it is spurted up through the push rod stay on the rocker arm instead being squrted past the rocker arm. Those little metal pieces not being in place could cause the rocker arms not to be lubed proper.
Still though, the movment your showing in that video looks normal.
Neil
The knock your hearing, is it a hard clunk, a rattle clunk or a jingle rattle.
yes, those things the rocker arms bolt to are called the cylinder heads.Something I noticed in the video, those rocker arms dont have the little thin metal splash guards in place.
Those splash guards, would make the oil as it is spurted up through the push rod stay on the rocker arm instead being squrted past the rocker arm. Those little metal pieces not being in place could cause the rocker arms not to be lubed proper.
Still though, the movment your showing in that video looks normal.
Neil
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From: Albany OR
Senior User
Joined: Nov 2008
Posts: 276
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From: Nashville NC
Hard to figure out the sound, I guess the video is making it sound different to me than how it sounds to you.
I'm hearing more squeeking than knocking more like fan belts. Ever once in a while it has a sound like a rocker arm rattle.
One more time, oil presure, or is it the truck dont have a gauge in the dash & you cant tell.
Neil
I'm hearing more squeeking than knocking more like fan belts. Ever once in a while it has a sound like a rocker arm rattle.
One more time, oil presure, or is it the truck dont have a gauge in the dash & you cant tell.
Neil
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From: Albany OR
i have a gauge that tells me but it dose not give it in psi. if i took pic of each would that help or is there any other way to find out.
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From: Indiana
What I hear, sounds like rocker arm clatter.
The fulcrums wear into the rocker arms over time. Both usually wind up scored and worn.
The rockers are non adjustable so you pick up some extra clearance, thus the light rattle.
And the oil splash guards (deflectors) missing, would not help keep the oil on top of the rockers as C-L-R mentioned above. The deflectors catch the squirt of oil as it comes up through the pushrod and direct it back down to the fulcrum area for lubrication.
Right now, your oil is shooting right over the rockers.
What year is you engine? If its a 93 gets rockers for a 93.
P.S. The tips of the pushrods that ride under the rockers, wear down over time too, And they will wear the pushrod slot on the underside of the rocker.
The fulcrums wear into the rocker arms over time. Both usually wind up scored and worn.
The rockers are non adjustable so you pick up some extra clearance, thus the light rattle.
And the oil splash guards (deflectors) missing, would not help keep the oil on top of the rockers as C-L-R mentioned above. The deflectors catch the squirt of oil as it comes up through the pushrod and direct it back down to the fulcrum area for lubrication.
Right now, your oil is shooting right over the rockers.
What year is you engine? If its a 93 gets rockers for a 93.
P.S. The tips of the pushrods that ride under the rockers, wear down over time too, And they will wear the pushrod slot on the underside of the rocker.
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From: Albany OR
Ok cool should i get all 16 or just get 8 since the knock is on the passenger side.
Do i need new rods to if so would these work to gather
1330-1 - Comp Cams Pro Magnum Roller Rocker Arms Comp Cams 1330-1
7834-16 - Comp Cams High Energy Pushrods Comp Cams 7834-16
Do i need new rods to if so would these work to gather
1330-1 - Comp Cams Pro Magnum Roller Rocker Arms Comp Cams 1330-1
7834-16 - Comp Cams High Energy Pushrods Comp Cams 7834-16
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Joined: Sep 1999
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From: Indiana
Ok cool should i get all 16 or just get 8 since the knock is on the passenger side.
Do i need new rods to if so would these work to gather
1330-1 - Comp Cams Pro Magnum Roller Rocker Arms Comp Cams 1330-1
7834-16 - Comp Cams High Energy Pushrods Comp Cams 7834-16
Do i need new rods to if so would these work to gather
1330-1 - Comp Cams Pro Magnum Roller Rocker Arms Comp Cams 1330-1
7834-16 - Comp Cams High Energy Pushrods Comp Cams 7834-16
If your motor is stock, I would replace them with stock parts. They will last a long time.
I would replace all at once. Be sure to put the oil deflectors on. I am thinking they come with the rockers, but not 100% sure.
If the parts are separate, you need 16 rocker arms, 16 fulcrums, (or pivots/pedestals), and 16 deflectors, and 16 push rods. You can reuse the hold down bolts if needed.
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Joined: Feb 2009
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From: American Samoa
For the price of an inlet manifold gasket and a few hydraulic lifters it wouldn't hurt to replace them while you are at it... Dont forget to oil it all where everything touches when you put it together and you'll need all of the associated gaskets as well - valve cover gaskets etc... Good luck.
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