HELP! good oil pressure at top of block but NO oil getting to the rockers????
10-12-2013, 11:52 AM
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Staging Lane
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HELP! good oil pressure at top of block but NO oil getting to the rockers???? i Drive a 1993 with a LT1, so here is the story my lifters started making some pretty bad noises, so i replaced them with some new AC delco lifters part # NAL-12499225 from summit , Everything was done very carefully and right, one of the lifters was scorn on the roller but the cam lobe looked good, ok well the car is still making this screeching noise on the ride home, same noise it was, i pulled the valve covers this morning and started it, there isnt a drop of oil getting to the rockers, any of them, im baffled because i have my mechanical oil pressure gauge on the top of the block behind the intake and it reads good pressure across all rpms. any help would be greatly appreciated,
10-12-2013, 10:34 PM
#3
First things first. Did you tighten the rocker arm nuts? If not, do so. If you did, Make sure there not to tight. Oil can sometimes take a awhile before it gets up to the rockers. I would set lash and run the car for atleast 3 minutes. I would even hold the throttle at around 2k until you see oil come up. If in the rare case that it doesnt. Then something may be up.
10-13-2013, 10:48 AM
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First things first. Did you tighten the rocker arm nuts? If not, do so. If you did, Make sure there not to tight. Oil can sometimes take a awhile before it gets up to the rockers. I would set lash and run the car for atleast 3 minutes. I would even hold the throttle at around 2k until you see oil come up. If in the rare case that it doesnt. Then something may be up.
all the rockers are torqued to the specs, Ive had the car running for 10 mins and i even drove it about 10 mins, the drive was before i knew it wasn't getting oil. thats when i noticed the squeak it was making still. Sounds like i should just start the engine build that i was planning on doing anyway.
10-13-2013, 01:19 PM
#6
all the rockers are torqued to the specs, Ive had the car running for 10 mins and i even drove it about 10 mins, the drive was before i knew it wasn't getting oil. thats when i noticed the squeak it was making still. Sounds like i should just start the engine build that i was planning on doing anyway.
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10-14-2013, 11:54 AM
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I ran into a similar problem and found the malfunction to be one of the three tiny soft plugs behind the timing gear had fallen out. Also, found the top center one wasn't the venten one required.
10-14-2013, 05:02 PM
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http://www.youtube.com/watch?v=Bpefz...ature=youtu.be
That is a video of the car running at idle and me rev'ing it up a little also has the squeak the motor is making in it, This was done on the motor under normal operating tempature, however i did let the car warm up and there was no change in the oil flow
That is a video of the car running at idle and me rev'ing it up a little also has the squeak the motor is making in it, This was done on the motor under normal operating tempature, however i did let the car warm up and there was no change in the oil flow
10-14-2013, 06:00 PM
#11
http://www.youtube.com/watch?v=Bpefz...ature=youtu.be
That is a video of the car running at idle and me rev'ing it up a little also has the squeak the motor is making in it, This was done on the motor under normal operating tempature, however i did let the car warm up and there was no change in the oil flow
That is a video of the car running at idle and me rev'ing it up a little also has the squeak the motor is making in it, This was done on the motor under normal operating tempature, however i did let the car warm up and there was no change in the oil flow
I suggest you do not operate the engine any more, until you figure out the problem....
10-14-2013, 06:36 PM
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http://www.youtube.com/watch?v=Bpefz...ature=youtu.be
That is a video of the car running at idle and me rev'ing it up a little also has the squeak the motor is making in it, This was done on the motor under normal operating tempature, however i did let the car warm up and there was no change in the oil flow
That is a video of the car running at idle and me rev'ing it up a little also has the squeak the motor is making in it, This was done on the motor under normal operating tempature, however i did let the car warm up and there was no change in the oil flow
I would manually poor some oil on the rockers for extra protection. Try pouring oil in the return oil passage and see what it does.
Last edited by 93Euphoria; 10-14-2013 at 06:42 PM.
10-14-2013, 07:06 PM
#13
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ive been keeping them well lubed when running the motor, that was just the first time i ran it with the valve covers off, today i pulled the covers back off ran it a little bit then adjusted the rockers to 1 1/4 turn and it started pumping oil, i took it for a ride was good for a bit then it started making that noise again, its dark now but tomorrow after work ill re pull the covers to see if its still pumping, if its still pumping oil then, i dont know... maybe a worn out rocker arm? it seems to be coming from the front cylinder on the drivers side, thats the side that had the bad lifter also when we changed them
